SONUS CORP
8-K, 1999-10-12
MISC HEALTH & ALLIED SERVICES, NEC
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                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549


                                    FORM 8-K

                                 CURRENT REPORT

                     Pursuant to Section 13 or 15(d) of the
                         Securities Exchange Act of 1934


                Date of Report (Date of Earliest Event Reported):

                                 October 1, 1999



                                   Sonus Corp.
             (Exact name of Registrant as Specified in its Charter)


                             Yukon Territory, Canada
                 (State or Other Jurisdiction of Incorporation)

                                     0-22367
                            (Commission File Number)

                                 Not Applicable
                        (IRS Employer Identification No.)

                        111 S.W. Fifth Avenue, Suite 1620
                             Portland, Oregon 97204
               (Address of Principal Executive Offices) (Zip Code)


               Registrant's Telephone Number, Including Area Code
                                 (503) 225-9152


<PAGE>

ITEM 5.  OTHER EVENTS.

      On October 1, 1999, Sonus Corp. (the  "Corporation")  consummated the sale
of 2,500,000  Series B Convertible  Preferred  Shares (the "Series B Shares") to
Warburg,  Pincus Ventures,  L.P., a Delaware limited partnership ("Warburg LP"),
for  $10,000,000  in cash.  The  source of funds  for the  purchase  was  liquid
investment  funds  held  by  Warburg  LP.  The  net  proceeds  of  approximately
$9,890,000 will be used for working  capital and for  acquisitions of additional
audiology-related  businesses.  The  Corporation  relied on the  exemption  from
registration  provided by Section 4(2) under the Securities Act of 1933 and Rule
506 of  Regulation  D  promulgated  thereunder  with  respect to the sale of the
Series B Shares.

      In  connection  with the sale of the  Series B Shares to  Warburg  LP, the
Corporation  agreed  to  reduce  the  exercise  price  of  outstanding  warrants
entitling  Warburg to purchase  2,000,000  Common Shares (the  "Warrants")  from
$12.00 to $6.75 per share, to extend the exercise period to October 1, 2004, and
to remove  the  limitation  on the  number of shares  that may be issued  upon a
cashless exercise of the Warrants. The Corporation also agreed to submit certain
amendments to the terms of the outstanding Series A Convertible Preferred Shares
(the  "Series A  Shares";  the  Series A Shares  and the  Series B Shares may be
collectively  referred  to as the  "Preferred  Shares")  owned by Warburg LP for
consideration and approval by the Corporation's  shareholders at the 1999 annual
meeting of  shareholders.  The proposed  amendments to the terms of the Series A
Shares provide that dividends  payable thereon may be paid in Common Shares,  at
the option of the  Corporation,  until December 24, 2002, and thereafter only in
cash, and lower the earnings and share price thresholds for mandatory conversion
of the  Series A  Shares.  The  Series A Shares  and  Warrants  were  originally
purchased by Warburg LP in December 1997.

      The Series B Shares are initially  convertible at the option of the holder
on a one-for-one  basis into  2,500,000  Common Shares at a conversion  price of
$4.00 per share.  The conversion  rate is subject to increase to the extent that
the  Corporation's  receivables as of July 31, 1999,  that are collected by July
31,  2000,  total  less than  $4,736,000,  as well as to  adjustments  for stock
dividends,  stock  splits,  recapitalizations,  and  other  similar  events.  In
addition,  until the Corporation  attains specified  quarterly earnings targets,
the  conversion  rate  will  increase  beginning  October  31,  2000,  such that
approximately 200,000 additional Common Shares would be issuable upon conversion
at that date with  respect to the four fiscal  quarters  then ended.  Additional
adjustments will be made each quarter thereafter as long as the earnings targets
have not been met. The amount of such quarterly  adjustments  will be based on a
factor of 2 percent  of the  original  purchase  price plus the sum of all prior
adjustments  until  November  1, 2004,  increasing  in steps  thereafter  to 4.5
percent  beginning  November 1, 2006. Once the Corporation has met the specified
earnings targets for four consecutive fiscal quarters, no further adjustments in
the  conversion  rate will be made. The Series B Shares are subject to mandatory
conversion at the option of the  Corporation if certain share price and earnings
targets are met.

      Cash  dividends  will accrue on the Series B Shares at an annual rate of 8
percent  of the  conversion  price  then  in  effect  until  November  1,  2004,
increasing  in steps  thereafter  to 18  percent  beginning  November  1,  2006,
provided that the Corporation has met specified  quarterly earnings targets.  If
the  Corporation  has not met the earnings  targets by July 31, 2002,  dividends
will not accrue or be payable on the  Series B Shares.  Upon  conversion  of the
Series B Shares, any accumulated dividends will be forfeited.

                                      -2-
<PAGE>

      The  Series B Shares  are  entitled  to one vote per share (or such  other
number of votes equal to the number of Common Shares into which a Series B Share
shall be convertible  from time to time) on all matters  presented for action by
the  Corporation's  shareholders.  As a result of the  purchase  of the Series B
Shares  and  continued  ownership  of the Series A Shares by  Warburg  LP,  both
Warburg LP and its general  partner,  Warburg,  Pincus & Co.  ("Warburg"),  have
beneficial  ownership,  including voting and investment  power,  with respect to
approximately   46  percent  of  the  outstanding   voting   securities  of  the
Corporation.  Including  the  Series A  Shares,  the  Series  B  Shares  and the
Warrants,  Warburg LP and Warburg have beneficial  ownership of approximately 54
percent  of the  voting  securities  of the  Corporation.  As long as Warburg LP
beneficially  owns at least  666,666  Common  Shares or  Preferred  Shares,  the
Corporation will not be permitted to engage in specified  significant  corporate
transactions without Warburg LP's written consent.

      For so long as Warburg LP beneficially owns a number of outstanding Common
Shares or Preferred  Shares  constituting at least 10 percent of the outstanding
Common  Shares  (including  the Common Shares  issuable  upon  conversion of the
Preferred Shares,  but excluding the Common Shares issuable upon exercise of the
Warrants),  the Corporation  will be required to nominate and use its reasonable
best  efforts  to cause to be  elected  and remain as  directors  three  persons
designated by Warburg LP who are reasonably satisfactory to the Corporation.  In
connection  with the sale of the Series B Shares to Warburg LP, the  Corporation
appointed  David J.  Wenstrup  as a  director.  Joel  Ackerman  and  Haywood  D.
Cochrane,  Jr., were previously elected to the board to fill two other positions
as Warburg LP designees.

      The number of board positions for which Warburg LP may designate a nominee
will  increase to four if and so long as the number of positions on the Board of
Directors exceeds eight. In addition, as long as Warburg LP beneficially owns at
least 666,666 Common Shares or Preferred Shares,  the number of positions on the
Board of Directors may not exceed 11. The  applicable  number of designees  will
decrease  by one at such  time as  Warburg  LP  beneficially  owns  less than 10
percent of the outstanding  Common Shares  (including the Common Shares issuable
upon conversion of the Preferred Shares but excluding the Common Shares issuable
upon exercise of the  Warrants),  and will decrease to none if Warburg LP ceases
to  beneficially  own at least 666,666  Common Shares or Preferred  Shares.  The
right to designate one nominee for director may be  transferred by Warburg LP to
a single  purchaser  of at least  1,333,333  Preferred  Shares or Common  Shares
issuable upon conversion thereof.

      The  Series  B  Shares  may  not  be  redeemed  before  October  1,  2004.
Thereafter,  the  Series  B  Shares  will be  redeemable  at the  option  of the
Corporation,  in  whole  or in  part,  for an  amount  per  share  equal  to the
conversion  rate then in effect  multiplied by (1) the conversion  price then in
effect plus any accrued and unpaid dividends or (2) the fair market value of the
Series B Shares, whichever is greater.

      The Series B Shares carry a liquidation  preference per share equal to the
conversion  rate then in effect  multiplied by (1) the conversion  price then in
effect plus any accrued and unpaid dividends or (2) the amount  distributable as
if the Series B Shares had been converted into Common Shares  immediately  prior
to liquidation plus any accrued and unpaid dividends,  whichever is greater. The
Corporation  will be prohibited  from paying cash dividends to holders of Common
Shares unless the accumulated dividends on the Series B Shares have been paid in
full.

                                      -3-
<PAGE>

      The Securities  Purchase  Agreement  pursuant to which the Series B Shares
were issued and sold,  including the terms of the Series B Shares,  the terms of
the Series A Shares as  proposed to be  amended,  and the  amended  terms of the
Warrants,  is attached as Exhibit 4 hereto.  The news release  dated  October 4,
1999,  in which the  Corporation  announced  the  consummation  of the foregoing
transaction, is attached as Exhibit 99 hereto.

ITEM 7.     FINANCIAL STATEMENTS, PRO FORMA FINANCIAL INFORMATION AND EXHIBITS.

            (c)  Exhibits

                  Exhibit 4 Securities Purchase Agreement dated as of October 1,
1999, between Sonus Corp. and Warburg, Pincus Ventures, L.P.

                  Exhibit 99  News Release of Sonus Corp. dated October 4, 1999

                                    SIGNATURE

      Pursuant to the  requirements of the Securities  Exchange Act of 1934, the
Registrant  has duly  caused  this  Report  to be  signed  on its  behalf by the
undersigned thereunto duly authorized.

DATED:  October 12, 1999            SONUS CORP.



                                    By  /s/ Scott E. Klein
                                        Scott E. Klein, President


<PAGE>




                                   SONUS CORP.
                         -------------------------------

                          SECURITIES PURCHASE AGREEMENT
                         -------------------------------

                 2,500,000 Series B Convertible Preferred Shares
                         -------------------------------





                           Dated as of October 1, 1999



<PAGE>


                                Table of Contents
                                -----------------

Section
- -------

1. Sale and Purchase...........................................................1
2. Closing; Payment of Purchase Price..........................................1
3. Representations and Warranties of the Company...............................2
         (a) Organization; Good Standing.......................................2
         (b) Governmental Authority............................................3
         (c) Authorization of Agreements.......................................3
         (d) Capitalization....................................................4
         (e) Authorization of Convertible Shares and Warrants..................4
         (f) Consents and Approvals............................................5
         (g) Noncontravention..................................................5
         (f) Consents and Approvals............................................5
         (h) Change in Ownership...............................................6
         (i) Litigation........................................................6
         (j) Reports and Financial Statements..................................7
         (k) Liabilities.......................................................7
         (l) Material Contracts................................................8
         (m) Employees.........................................................8
         (n) Employee Benefit Plans............................................9
         (o) Patents, Licenses, etc...........................................10
         (p) Taxes............................................................10
         (q) Properties.......................................................11
         (r) Condition of Properties..........................................11
         (s) Insurance........................................................12
         (t) No Adverse Change................................................12
         (u) Transactions with Related Parties................................12
         (v) Interest in Competitors..........................................12
         (w) Registration Rights..............................................13
         (x) Private Offering.................................................13
         (z) Illegal or Unauthorized Payments; Political Contributions........13
         (aa) Material Facts..................................................13
         (bb) No Integrated Offering..........................................14
         (cc) Accounts Receivable.............................................14
4. Covenants of the Company...................................................14
         (a) Representations and Warranties...................................14
         (b) Board of Directors...............................................14
         (c) Use of Proceeds..................................................16
         (d) Financial and Business Information...............................16
              (i)   Monthly and Quarterly Statements..........................16
              (ii)  Annual Statements.........................................16
              (iii) Business Plan; Projections................................17
              (iv)  Audit Reports.............................................17
              (v)   Other Reports.............................................17
              (vi)  Progress Report...........................................17
              (vii) Requested Information.....................................17
         (e) Audit Report.....................................................18
         (f) Inspection.......................................................18
         (g) Takeover Statute.................................................18
         (h) Conduct of Business and Maintenance of Existence.................18
         (i) Compliance with Laws.............................................19



<PAGE>


         (j) Insurance........................................................19
         (k) Keeping of Books.................................................19
         (l) Lost, etc. Certificates Evidencing Securities (or Common.........19
             Shares); Exchange
         (m) Limitations on Corporate Actions.................................19
         (n) Commencement and Termination of Covenants........................20
         (o) Form D Filing....................................................20
         (y) Brokerage........................................................20
5. Representations, Warranties and Covenants of the Investor;.................21
   Additional Covenants of the Company
         (a) General..........................................................21
         (b) Disclosure and Non-Public Information............................22
         (c) Securities Act Matters...........................................23
         (d) Limitation on Transfer...........................................23
         (e) No Intention of Board to Pay Dividends...........................23
         (g) Consents and Approvals...........................................23
6. Conditions to Closing......................................................24
              (i)    Representations and Warranties...........................24
              (ii)   Compliance with Agreement................................24
              (iii)  No Legislation or Injunction.............................24
              (iv)   Adverse Developments.....................................24
              (v)    Consents and Approvals...................................24
              (vi)   Officers' Certificate....................................24
              (vii)  Opinions of Counsel......................................25
              (viii) Secretary's Certificate..................................25
              (ix)   Approval of Proceedings..................................25
              (x)    Warrant Agreement........................................25
              (xiii) Filing of Convertible Shares Certificate.................26
              (xvi)  Directors................................................26
              (i)    Consents and Approvals...................................26
              (ii)   No Legislation or Injunction.............................26
              (iii)  General Partner's Certificate............................26
7. Expenses of Sale...........................................................26
8. Registration Rights........................................................27
9. Indemnification............................................................33
10. Contribution..............................................................36
11. Notices...................................................................37
12. Parties...................................................................38
13. Termination and Survival..................................................38
14. Amendment and Modification................................................38
15. Further Assurances........................................................39
16. Waiver of Breach..........................................................39
17. Entire Agreement..........................................................39
18. Severability..............................................................39
19. Limitation on Enforcement of Remedies.....................................39
20. Counterparts..............................................................39
21. Law.......................................................................39

    Schedule 3(d)                  Derivative Securities
    Schedule 3(f)                  Consents and Approvals
    Schedule 3(g)                  Defaults
    Schedule 3(k)                  Liabilities
    Schedule 3(l)                  Key Agreements and Instruments
    Schedule 3(m)(ii)              Employment Agreements


                                      -ii-

<PAGE>


    Schedule 3(n)                  Employee Benefit Plans Under ERISA
    Schedule 3(q)                  Properties
    Schedule 3(u)                  Related Parties
    Schedule 4(m)                  Redemption Obligations Incurred in Connection
                                   with the Acquisition of Hearing Clinics

Exhibit A      Form of Amended and Restated Warrant Agreement

Exhibit B      Form of Amended and Restated Terms of Series A Convertible
               Preferred Shares

Exhibit C      Form of Terms of Series B Convertible Preferred Shares

Exhibit D-1    Form of Opinion of Ballem MacInnes

Exhibit D-2    Form of Opinion of Davis & Company

Exhibit D-3    Form of Opinion of Miller, Nash, Wiener, Hager & Carlsen, LLP


Note:  All schedules and Exhibits D-1 through D-3 have been omitted. Copies will
       be furnished to the Commission supplementally upon request.

                                      -iii-

<PAGE>


                                   SONUS CORP.
                        ---------------------------------

                          SECURITIES PURCHASE AGREEMENT
                        ---------------------------------

                 2,500,000 Series B Convertible Preferred Shares
                        ---------------------------------

                        ---------------------------------


     This Securities Purchase Agreement (this "Agreement") is made as of October
1, 1999 by and between Sonus Corp.,  a corporation  continued and existing under
the laws of  Yukon  Territory,  Canada  (the  "Company"),  and  Warburg,  Pincus
Ventures, L.P., a Delaware limited partnership (the "Investor").

     WHEREAS,  the Investor  wishes to purchase  and the Company  wishes to sell
certain securities of the Company as set forth in this Agreement;

     WHEREAS,  the Investor and the Company  entered into a Securities  Purchase
Agreement,  dated November 21, 1997 (the "1997 Securities Purchase  Agreement"),
pursuant  to  which  the  Investor  received  13,333,333  Series  A  Convertible
Preferred  Shares,  no par value,  of the  Company  (the  "Series A  Convertible
Shares");

     WHEREAS,  the  Investor and the Company  entered into a Warrant  Agreement,
dated  December  24,  1997  (the  "Warrant  Agreement"),  pursuant  to which the
Investor received  warrants (the "Warrants") to purchase  2,000,000 (as adjusted
for the  Company's  1-for-5  reverse  stock split on  February  9, 1998)  common
shares, without par value, of the Company (the "Common Shares").

     NOW,  THEREFORE,  to effect such purchase and sale and in  consideration of
the mutual covenants, representations, warranties and agreements hereinafter set
forth and intending to be legally bound by this  Agreement,  the Company and the
Investor agree as follows:

     1. Sale and Purchase.  The Company agrees to issue and sell to the Investor
and the  Investor  agrees  to  purchase  from  the  Company  2,500,000  Series B
Convertible  Preferred  Shares,  no par value,  of the  Company  (the  "Series B
Convertible Shares" and,  collectively with the Series A Convertible Shares, the
"Convertible  Shares") for an aggregate purchase price of U.S.  $10,000,000 (the
"Purchase  Price") on the terms and conditions set forth in this Agreement.  The
Series B Convertible  Shares are sometimes  referred to in this Agreement as the
"Securities."

     2. Closing; Payment of Purchase Price. The closing of the purchase and sale
of the Securities  hereunder (the  "Closing")  shall occur on October 1, 1999 at
the offices of Willkie Farr &




<PAGE>


Gallagher,  787  Seventh  Avenue,  New York,  New York,  or such  other date and
location  as may be  agreed  upon by the  Company  and the  Investor;  provided,
however,  the Closing shall not occur until the closing  conditions set forth in
Section 6 hereto have been satisfied.  At the Closing:  (a) the Investor and the
Company shall execute and deliver the amendment and  restatement  to the Warrant
Agreement,  in the form of Exhibit A hereto (the  "Amended and Restated  Warrant
Agreement";  this Agreement and the Amended and Restated  Warrant  Agreement are
collectively referred to herein as the "Transaction Documents"); (b) the Company
shall file articles of amendment  designating  the Series B Convertible  Shares,
the  terms  thereof  to be  in  the  form  of  Exhibit  C  hereto;  and  (c)  in
consideration  and exchange for the delivery to the Investor at the Closing of a
certificate for 2,500,000 Series B Convertible Shares, the Investor shall pay to
the Company the Purchase Price by wire transfer of immediately  available  funds
to an account previously  designated in writing by the Company.  The date of the
Closing may be changed by mutual agreement of the Company and the Investor,  and
the date on which  the  Closing  actually  occurs is  referred  to herein as the
"Closing Date."

     3.  Representations  and Warranties of the Company.  The Company represents
and warrants to the Investor as follows:

          (a)  Organization;  Good Standing.  The Company is a corporation  duly
     continued,  validly  existing and in good standing  under the laws of Yukon
     Territory,  Canada with full power and authority,  corporate and other,  to
     own or lease and operate  its  properties  and to conduct  its  business as
     currently  conducted.  Except as provided in Section 3(b),  the Company has
     made all necessary filings under all applicable  corporate,  securities and
     any other laws to which it is subject,  except where  failure to file would
     not  have  a  material  adverse  effect  on  the  condition  (financial  or
     otherwise),  results of operations,  business,  assets, or prospects of the
     Company  and its  Subsidiaries  (as  defined  below)  taken  as a whole  (a
     "Material  Adverse  Effect").   The  Company  is  the  direct  or  indirect
     beneficial  owner of all of the  outstanding  securities  of the  following
     corporations (each, a "Subsidiary" and, collectively, the "Subsidiaries"):

          SONUS-Canada Ltd., a British Columbia, Canada, corporation;

          SONUS-USA, Inc., a Washington corporation;

          Hear PO Corp., a New Mexico corporation; and

          SONUS-Texas, Inc., an Oregon corporation.

     Each Subsidiary is a corporation  duly organized,  validly  existing and in
     good standing under the laws of its  jurisdiction  of  incorporation,  with
     full power and


                                      -2-

<PAGE>


     authority,  corporate and other, to own or lease and operate its properties
     and to conduct its business as currently  conducted,  and is duly qualified
     to do  business  as a foreign  corporation  and is in good  standing in all
     jurisdictions  where such  qualification  is  necessary  and  except  where
     failure  to so  qualify  would not have a  Material  Adverse  Effect.  Each
     Subsidiary  has made all necessary  filings  required  under all applicable
     corporate,  securities  and any other laws to which it is  subject,  except
     where failure to file would not have a Material Adverse Effect. The Company
     has no subsidiaries other than the Subsidiaries.

          (b)  Governmental  Authority.  Each filing,  authorization,  approval,
     consent,   order,   registration,   license  or  permit  of  any  court  or
     governmental  or regulatory  agency or body required in connection with the
     execution and delivery by the Company of the Transaction  Documents and the
     consummation  of the  transactions  therein  contemplated  has been made or
     obtained,  except such as may be required  under (i) the  Securities Act of
     1933, as amended (the  "Securities  Act"), the Blue Sky laws or regulations
     of the  various  states  or  the  securities  laws  of  the  provinces  and
     territories  of  Canada  and (ii)  the  by-laws  or  rules of the  National
     Association of Securities Dealers, Inc.

          (c)  Authorization  of  Agreements.  The  Company  has full  power and
     authority,  corporate  and other,  to  execute,  deliver  and  perform  the
     Transaction  Documents  and to  consummate  the  transactions  contemplated
     thereby and to perform its obligations thereunder. The execution,  delivery
     and  performance  of the  Transaction  Documents  by the  Company  and  the
     consummation by the Company of the transactions  therein  contemplated have
     been duly authorized by all necessary  corporate  action on the part of the
     Company.  This  Agreement has been,  and as of the Closing Date the Amended
     and Restated Warrant  Agreement will be, duly executed and delivered by the
     Company. This Agreement constitutes, and as of the Closing Date the Amended
     and  Restated  Warrant  Agreement  will  constitute,  the valid and binding
     obligations  of the Company  enforceable  against the Company in accordance
     with  their  terms,  except  insofar  as  enforcement  may  be  limited  by
     applicable  bankruptcy,  insolvency,  reorganization,  moratorium and other
     laws  affecting the rights of creditors  generally and by the discretion of
     courts in granting equitable  remedies,  and except that (i) enforceability
     of the indemnification provisions and the contribution provisions set forth
     in this  Agreement  may be limited by  Canadian  law,  the federal or state
     securities  laws of the United States or the public policy  underlying  any
     such  laws,  and (ii) the  validity  of Section  21 of this  Agreement  and
     Sections 13 and 15 of the Amended and  Restated  Warrant  Agreement  may be
     limited by the public  policy of Canada or the State of New York,  and with
     respect to the United States District Court for the Southern District of


                                      -3-

<PAGE>


     New York,  may be subject to the  discretion  of the Court  pursuant  to 28
     U.S.C.  Section  1404(a).  The execution,  delivery and  performance of the
     Transaction  Documents by the Company,  the  consummation by the Company of
     the transactions  therein  contemplated,  and the compliance by the Company
     with the terms of the  Transaction  Documents do not, and will not, with or
     without the giving of notice or the lapse of time,  or both,  (i) result in
     any  violation  of the  constating  documents  of the Company or any of its
     Subsidiaries,  (ii) result in a breach of or conflict with any of the terms
     or  provisions  of,  or  constitute  a  default  under,  or  result  in the
     modification  or termination of, or result in the creation or imposition of
     any  lien,  security  interest,  charge  or  encumbrance  upon  any  of the
     properties or assets of the Company or any of its Subsidiaries pursuant to,
     any indenture,  mortgage, note, contract,  commitment or other agreement or
     instrument that is material to the Company and the Subsidiaries  taken as a
     whole,  to which the Company or any  Subsidiary  is a party or by which the
     Company or any  Subsidiary or any of its or their  properties or assets are
     bound or  affected;  (iii)  violate  any  existing  applicable  law,  rule,
     regulation,  judgment, order or decree of any governmental agency or court,
     domestic or foreign, having jurisdiction over the Company or any Subsidiary
     or its or their  properties or business;  or (iv) have any Material Adverse
     Effect.

          (d) Capitalization.

               (i)  The  authorized  capital  of  the  Company  consists  of  an
          unlimited  number of Common Shares  without par value and an unlimited
          number of preferred  shares without par value  issuable in series.  At
          the date hereof,  there were issued and outstanding  6,109,026  Common
          Shares and 13,333,333 Series A Convertible  Shares,  all of which have
          been  duly  authorized  and  validly  issued  and are  fully-paid  and
          non-assessable.  The terms of the Series B Convertible Shares shall be
          as described in Exhibit C.

               (ii) Except as  disclosed in or  contemplated  by the Company SEC
          Reports  (defined  below) and in Schedule  3(d)  hereto,  there are no
          outstanding  securities convertible into Common Shares or any options,
          warrants or other rights to purchase any Common  Shares or  securities
          convertible into Common Shares.

          (e)  Authorization  of  Convertible  Shares  and  Warrants.  As of the
     Closing Date, the Company will have duly authorized and created a series of
     preferred shares designated as "Series B Convertible  Preferred Shares" and
     consisting of the Series B Convertible Shares. The issuance and sale of the
     Series  B  Convertible  Shares  and the  Common  Shares  issuable  upon the
     conversion of the Series A


                                      -4-

<PAGE>


     Convertible  Shares and the Series B Convertible Shares and the exercise of
     the Warrants have been duly authorized by the Company and, when issued, the
     Series B Convertible  Shares and each Common Share issuable upon conversion
     of the Series A Convertible  Shares and the Series B Convertible Shares and
     upon  exercise of the Warrants,  will be validly  issued and fully paid and
     nonassessable,  and the holder  thereof  will not be  subject  to  personal
     liability solely by reason of being such holder.  None of the Securities or
     such  Common  Shares  is or will be  subject  to  preemptive  rights of any
     securityholder of the Company. The issuance of new warrant certificates for
     the  Warrants,  the terms of which  reflect  the terms of the  Amended  and
     Restated Warrant Agreement, has been duly authorized by the Company.

          (f) Consents and Approvals.  Except as set forth on Schedule 3(f), the
     execution  and delivery by the Company of the  Transaction  Documents,  the
     issuance of the Series B Convertible  Shares and the Common Shares issuable
     upon the  conversion  of the Series A  Convertible  Shares and the Series B
     Convertible Shares and the exercise of the Warrants, the performance by the
     Company of its obligations hereunder and thereunder and the consummation by
     the  Company of the  transactions  contemplated  hereby and  thereby do not
     require  the  Company or any of its  Subsidiaries  to obtain  any  consent,
     approval,  clearance  or  action  of,  or make  any  filing  submission  or
     registration with, or give any notice to, any Person or judicial authority.
     As used in this Agreement, "Person" shall mean an individual,  partnership,
     joint stock  company,  corporation,  limited  liability  company,  trust or
     unincorporated organization, and a government, agency, regulatory authority
     or political subdivision thereof.

          (g)  Noncontravention.  Except as set forth on Schedule 3(g),  neither
     the Company nor any of its  Subsidiaries  is in violation of, or in default
     under,  any term or provision  of (i) its  constating  documents,  (ii) any
     indenture,  mortgage,  deed of  trust,  credit  agreement,  note  or  other
     evidence of indebtedness,  contract, commitment, undertaking,  arrangement,
     or other  agreement or  instrument to which it is a party or by which it or
     any of its  properties or business is bound or subject and which  violation
     or default would have a Material  Adverse  Effect  (collectively,  the "Key
     Agreements and Instruments"), or (iii) except as described in Item 1 of the
     Company's  Annual Report on Form 10-KSB for the year ended July 31, 1998 as
     amended  by  Amendment  No. 1 on Form  10-KSB/A  (such Form  10-KSB,  as so
     amended,  being  hereinafter  referred to as the "1998 Form  10-KSB"),  any
     existing applicable law, rule, regulation, ordinance, code, judgment, order
     or decree of any governmental agency or court, domestic or foreign,  having
     jurisdiction  over the Company or any Subsidiary or any of their respective
     properties or businesses, which violation would have a


                                       -5-

<PAGE>


     Material Adverse Effect. The Company and each Subsidiary owns, possesses or
     has  obtained  all  material  governmental  and  other  licenses,  permits,
     certifications,    registrations,   approvals   or   consents   and   other
     authorizations  necessary  to own or  lease,  as the  case  may be,  and to
     operate its properties  and to conduct its business as currently  conducted
     and  described in the 1998 Form  10-KSB,  and all such  licenses,  permits,
     certifications, registrations, approvals, consents and other authorizations
     are in good standing.  There are no proceedings  pending or, to the best of
     the Company's knowledge,  threatened, seeking to cancel, terminate or limit
     any such licenses,  permits,  certifications,  registrations,  approvals or
     consents or authorizations, nor is there any basis therefor.

          (h) Change in Ownership. Neither the purchase of the Securities by the
     Investor nor the  consummation  of the  transactions  contemplated  by this
     Agreement will result in (i) a Material Adverse Effect, (ii) to the best of
     the Company's knowledge,  the loss of the benefits of any material business
     relationship,   including   with  any  customer  or  supplier,   (iii)  the
     acceleration  of the  vesting of any  outstanding  option,  warrant,  call,
     commitment, agreement, conversion right, preemptive right or other right to
     subscribe  for,  purchase  or  otherwise  acquire  any of the shares of the
     capital stock of the Company or any of its Subsidiaries, or debt securities
     of the Company or any of its Subsidiaries (collectively "Commitments",  and
     each  individually a  "Commitment"),  (iv) any obligation of the Company or
     its Subsidiaries to grant, extend or enter into any Commitment,  or (v) any
     right in favor of any Person to  terminate  or cancel any Key  Agreement or
     Instrument.

          (i)  Litigation.  There are no claims,  actions,  suits,  proceedings,
     arbitrations,  investigations  or inquiries  by or before any  governmental
     agency,  court or  tribunal,  domestic  or  foreign,  or before any private
     arbitration  tribunal,  pending or, to the best of the Company's knowledge,
     threatened   against  the  Company  or  any  Subsidiary  or  involving  the
     properties  or  business  of  the  Company  or  any  Subsidiary  which,  if
     determined adversely,  would, individually or in the aggregate, result in a
     Material Adverse Effect,  or which relate in any way to the validity of the
     capital stock of the Company or the validity of this  Agreement,  or of any
     action  taken or to be taken by the Company  pursuant  to or in  connection
     with this  Agreement.  Neither the Company nor any Subsidiary is subject to
     any order, writ, judgment,  injunction,  decree,  determination or award of
     any  court  or of  any  governmental  agency  or  instrumentality  (whether
     federal,  state,  local or foreign)  which could  reasonably be expected to
     have a Material Adverse Effect.


                                       -6-

<PAGE>


          (j) Reports and  Financial  Statements.  KPMG Peat Marwick LLP,  which
     rendered a report with respect to the financial  statements included in the
     1998 Form 10-KSB, are "independent  public  accountants" within the meaning
     of the  Securities  Act and the  regulations  promulgated  thereunder.  The
     Company has  furnished  the Investor  with true and complete  copies of the
     Company's  Quarterly  Reports on Form 10-QSB for the quarters ended October
     31, 1998, January 31, 1999, and April 30, 1999, the Company's  Registration
     Statement on Form SB-2 (Registration No. 333-23137) as amended by Amendment
     Nos. 1 and 2 and Post-Effective Amendment Nos. 1, 2 and 3 thereto, the 1998
     Form 10-KSB, and the Company's definitive  Management  Information Circular
     and Proxy Statement dated November 12, 1998 (collectively, the "Company SEC
     Reports").  As of their respective dates, the Company SEC Reports were duly
     filed and complied in all material  respects with the  requirements  of the
     Securities  Act or the  Securities  Exchange  Act of 1934,  as amended (the
     "Exchange  Act"),  as  applicable,  and the  rules and  regulations  of the
     Securities and Exchange Commission (the "Commission") thereunder applicable
     to such Company SEC Reports.  As of their respective dates, the Company SEC
     Reports did not contain any untrue  statement of a material fact or omit to
     state a material  fact  required to be stated  therein or necessary to make
     the statements therein, in light of the circumstances under which they were
     made, not misleading.  The audited  consolidated  financial  statements and
     unaudited  interim  financial  statements  of the  Company  included in the
     Company  SEC  Reports  comply  as to form  in all  material  respects  with
     applicable  accounting  requirements  of the Securities Act or the Exchange
     Act, as  applicable,  and with the published  rules and  regulations of the
     Commission with respect thereto.  The financial  statements included in the
     Company SEC Reports (i) have been prepared in accordance with United States
     generally accepted  accounting  principles ("GAAP") applied on a consistent
     basis (except as may be indicated  therein or in the notes  thereto),  (ii)
     present fairly,  in all material  respects,  the financial  position of the
     Company  and its  Subsidiaries  as at the dates  thereof and the results of
     their operations and cash flows for the periods then ended subject,  in the
     case of the unaudited  interim  financial  statements,  to normal  year-end
     audit adjustments and any other adjustments  described therein and the fact
     that  certain  information  and notes  have been  condensed  or  omitted in
     accordance  with  the  Securities  Act or the  Exchange  Act and the  rules
     promulgated  thereunder,  and  (iii)  are,  in all  material  respects,  in
     accordance  with the books of account and records of the Company  except as
     indicated therein.

          (k)  Liabilities.  Except as disclosed on Schedule 3(k), and except as
     and to  the  extent  reflected  or  reserved  against  in the  consolidated
     financial  statements of the Company  included in the  Company's  Quarterly
     Report on Form


                                       -7-

<PAGE>


     10-QSB for the quarter  ended April 30,  1999,  the Company has no material
     liabilities,  debts,  obligations  or claims  asserted  against it, whether
     accrued,  absolute,  contingent or otherwise,  and whether due or to become
     due, and  including,  but not limited to,  liabilities on account of taxes,
     unfunded  past service  liabilities  under any pension,  profit  sharing or
     similar plan, other governmental  charges or lawsuits brought subsequent to
     such date.

          (l) Material  Contracts.  Schedule 3(l) sets forth a true and complete
     list of each Key Agreement and  Instrument  other than Key  Agreements  and
     Instruments listed as exhibits to the 1998 Form 10-KSB.  Each Key Agreement
     and Instrument and any other material  contract listed as an exhibit to the
     1998 Form  10-KSB  that is  currently  in  effect,  is valid,  binding  and
     enforceable  against the Company or such  Subsidiary  and, to the Company's
     best knowledge,  the other parties  thereto,  in accordance with its terms,
     and is in full force and effect on the date hereof.

          (m) Employees.

               (i) The Company and its  Subsidiaries are in full compliance with
          all  laws  regarding  employment,  wages,  hours,  equal  opportunity,
          collective  bargaining and payment of social  security and other taxes
          except to the  extent  that  noncompliance  would not have a  Material
          Adverse Effect. Except as would not have a Material Adverse Effect, no
          complaint of any unfair labor  practice or  discriminatory  employment
          practice  against the Company or any  Subsidiary has been filed or, to
          the best of the Company's knowledge, threatened to be filed with or by
          the National Labor Relations Board,  the Equal Employment  Opportunity
          Commission  or any  other  administrative  agency,  federal,  state or
          provincial,  that regulates labor or employment practices,  nor is any
          grievance filed or, to the best of the Company's knowledge, threatened
          to be filed,  against the Company or any  Subsidiary  by any  employee
          pursuant to any collective bargaining or other employment agreement to
          which  the  Company  or any  Subsidiary  is a party or is  bound.  The
          Company and its  Subsidiaries  are in compliance  with all  applicable
          federal,  state,  provincial and local laws and regulations  regarding
          occupational  safety and health  standards  except to the extent  that
          noncompliance  will  not  have a  Material  Adverse  Effect,  and have
          received no unresolved complaints from any federal,  state, provincial
          or local agency or  regulatory  body  alleging  violations of any such
          laws or regulations.

               (ii) Except as set forth in Schedule 3(m)(ii),  the employment of
          all Persons  employed by the  Company or any of its  Subsidiaries  is,
          subject to the provisions


                                       -8-

<PAGE>


          of applicable law, terminable at will without any penalty or severance
          obligation of any kind on the part of the  employer.  All sums due for
          employee  compensation and benefits and all vacation time owing to any
          employees of the Company or any of its Subsidiaries have been duly and
          adequately  accrued on the  accounting  records of the Company and its
          Subsidiaries.

               (iii) The Company is not aware that any of its executive officers
          is obligated  under any  contract  (including  licenses,  covenants or
          commitments  of any  nature)  or other  agreement,  or  subject to any
          judgment,  decree or order of any court or administrative agency, that
          would interfere with the use of such executive  officer's best efforts
          to promote the  interests of the Company or that would  conflict  with
          the Company's business as proposed to be conducted.

               (iv) The Company is not aware that any  officer or key  employee,
          or that  any  group  of key  employees,  intends  to  terminate  their
          employment  with the  Company,  nor does the  Company  have a  present
          intention to terminate the employment of any of the foregoing.

          (n) Employee Benefit Plans.  Except as referred to in Schedule 3(n) or
     the  Company  SEC  Reports,  the  Company  and  its  Subsidiaries  have  no
     retirement  or  pension  plans in  respect  of  Canadian  employees  and no
     employee benefit plans (as defined for the purpose of employees  located in
     the  United  States  in  Section  3(3) of the  Employee  Retirement  Income
     Security Act of 1974) covering former and current  employees of the Company
     or any of its  Subsidiaries,  or  under  which  the  Company  or any of its
     Subsidiaries  has any  obligation  or  liability.  Schedule  3(n) lists all
     material compensation plans, including,  without limitation, those relating
     to bonuses, commissions,  profit-sharing, savings, stock options, insurance
     and deferred  compensation  or other  similar  fringe or employee  benefits
     arrangements  covering former or current employees of the Company or any of
     its  Subsidiaries or under which the Company or any of its Subsidiaries has
     any obligation or liability  (each, a "Benefit  Arrangement")  that are not
     referred  to in the 1998 Form 10-KSB or  material  incorporated  therein by
     reference.  True and complete copies of all Benefit  Arrangements have been
     provided or made available to the Investor for inspection prior to the date
     hereof.  The  Benefit  Arrangements  are  and  have  been  administered  in
     substantial  compliance  with  their  terms  and with the  requirements  of
     applicable law.


                                       -9-

<PAGE>


          (o) Patents, Licenses, etc.

               (i) Except as  described  in the 1998 Form 10-KSB and except with
          respect to the  security  interest  granted to Royal Bank of Canada by
          Sonus-Canada  Ltd., the Company or one of its Subsidiaries  owns, free
          and clear of all encumbrances, restrictions, liens, security interests
          and charges,  and has good and marketable  title to, or holds adequate
          licenses or otherwise  possesses  all such rights as are  necessary to
          use all  patents  (and  applications  therefor),  patent  disclosures,
          trademarks,  service marks, trade names,  copyrights (and applications
          therefor), integrated circuit topographies,  inventions,  discoveries,
          processes, know-how, scientific,  technical, engineering and marketing
          data,  formulae  and  techniques  used or proposed  to be used,  in or
          necessary  for the  conduct of its  business  as now  conducted  or as
          proposed to be conducted (collectively, "Intellectual Property").

               (ii) Neither the Company nor any of its Subsidiaries has received
          notice nor  otherwise  has reason to know of any  conflict  or alleged
          conflict  with the  rights of others  pertaining  to the  Intellectual
          Property  described  in this  Section  3(o)  where the  effect of such
          conflict could have a Material  Adverse Effect.  To the Company's best
          knowledge,  the  Company's  business,  as presently  conducted  and as
          proposed to be conducted, does not infringe upon or violate any patent
          rights or trade secrets of others.  To the Company's  best  knowledge,
          the  Company  and its  Subsidiaries  have the  right to use all  trade
          secrets, processes,  customer lists and other rights incident to their
          respective businesses as now conducted or as proposed to be conducted.

               (iii) To the best  knowledge of the Chief  Executive  Officer and
          the acting Chief Financial  Officer and Chief Operating Officer of the
          Company,  no employee of the  Company or any of its  Subsidiaries  has
          violated any employment agreement or proprietary information agreement
          which he or she had with a previous  employer or any patent  policy of
          such  employer,  or is a  party  to or  threatened  by any  litigation
          concerning  any patents,  trademarks,  trade  secrets,  service names,
          trade names, copyrights, licenses and the like.

          (p) Taxes.  The Company and each  Subsidiary has filed all tax returns
     required to be filed with the appropriate  taxing authorities in Canada and
     the United States,  including all  provincial,  state,  municipal and other
     local authorities  (whether relating to income,  sales, goods and services,
     franchise, withholding, real or personal property


                                      -10-

<PAGE>


     or other types of taxes) or has duly  obtained  extensions  of time for the
     filing  thereof,  and has paid in full all  taxes  which  have  become  due
     pursuant to such returns or claimed to be due by any such taxing  authority
     or otherwise due and owing,  except for taxes which are being  contested in
     good  faith  by way of  appropriate  proceedings  and in  respect  of which
     appropriate  reserves  have been taken on the  financial  statements of the
     Company  and except  where the  failure to file such tax  returns or to pay
     such taxes would not have a Material  Adverse  Effect.  The  provisions for
     taxes on the audited and unaudited  balance  sheets  described in Section 3
     (j) are sufficient for the payment in all material  respects of all accrued
     and unpaid  federal,  state,  county and local taxes of the Company and its
     Subsidiaries whether or not assessed or disputed as of the respective dates
     of such balance sheets.

          (q)  Properties.   The  Company  and  each  Subsidiary  has  good  and
     marketable  title to all  properties  owned by them,  free and clear of all
     security interests,  charges,  mortgages,  liens, encumbrances and defects,
     except such as are  described in the 1998 Form 10-KSB,  in Schedule 3(q) or
     such as do not  materially  affect  the  value or  transferability  of such
     property  and do not  interfere  with  the  use of  such  property  made or
     proposed to be made by the Company or such Subsidiary. The leases, licenses
     or  other  contracts  or  instruments  under  which  the  Company  and each
     Subsidiary  leases,  holds  or is  entitled  to use any  property,  real or
     personal,  are valid,  subsisting and enforceable with only such exceptions
     as are not  material  and do not  interfere  with the use of such  property
     made,  or proposed to be made, by the Company or such  Subsidiary,  and all
     rentals,  royalties or other payments accruing  thereunder which became due
     prior to the date of this  Agreement  have been duly paid,  and neither the
     Company nor any Subsidiary is in default thereunder and, to the best of the
     Company's knowledge,  no event has occurred which, with the passage of time
     or the giving of notice,  or both, would  constitute a default  thereunder.
     Neither the Company nor any Subsidiary has received notice of any violation
     of any applicable law, ordinance, regulation, order or requirement relating
     to its owned or leased  properties,  except where such violation  would not
     have a Material Adverse Effect.

          (r) Condition of Properties.  All  facilities,  machinery,  equipment,
     fixtures,  vehicles  and  other  properties  owned,  leased  or used by the
     Company and its Subsidiaries are reasonably fit and usable for the purposes
     for  which  they are  being  used,  are  adequate  and  sufficient  for the
     Company's  or  such  Subsidiary's  business  and  conform  in all  material
     respects with all applicable ordinances, regulations and laws.


                                      -11-

<PAGE>


          (s) Insurance.  The Company and each Subsidiary has adequately insured
     its  properties  against  loss or  damage  by fire or  other  casualty  and
     maintains  such other  insurance,  including but not limited to,  liability
     insurance,  as is usually  maintained by prudent  companies  engaged in the
     same or similar businesses.

          (t)  No  Adverse  Change.  Since  the  date  of the  latest  financial
     statements in the Company's Quarterly Report on Form 10-QSB for the quarter
     ended April 30, 1999,  except as otherwise stated in or contemplated by the
     Company's  Quarterly  Report on Form 10-QSB for the quarter ended April 30,
     1999 or the Company's internal  management reports provided to the Investor
     and except for the Transaction  Documents,  (i) the Company has not entered
     into  any  material  transactions  other  than in the  ordinary  course  of
     business;  and (ii) there has not been, and prior to the Closing Date there
     will not be, any event that constitutes a Material Adverse Effect.

          (u) Transactions with Related Parties. Except as described in the 1998
     Form 10-KSB or material  incorporated  therein by  reference or in Schedule
     3(u),  neither the Company nor any  Subsidiary  is a party to any agreement
     with  any of the  Company's  directors,  officers  or,  to the  best of the
     Company's knowledge,  any stockholders or any affiliate or family member of
     any of the foregoing  including,  without  limitation  any agreement  under
     which it: (i) leases any real or personal  property (either to or from such
     Person), (ii) licenses technology (either to or from such Person), (iii) is
     obligated to purchase any  tangible or  intangible  asset from or sell such
     asset to such Person,  (iv) purchases products or services from such Person
     (v) has borrowed  money from or lent money to such Person,  or (vi) employs
     as an employee or engages as a consultant  any family  member of any of the
     Company's  directors  or  officers.  To the best  knowledge of the Company,
     there  exist no  agreements  among  stockholders  of the  Company to act in
     concert with respect to their voting or holding of Company securities.

          (v) Interest in  Competitors.  Neither the Company nor, to the best of
     its knowledge, any of its officers or directors,  has any interest,  either
     by way of  contract  or by way of  investment  (other than as holder of not
     more than 2% of the outstanding  capital stock of a publicly traded Person)
     or otherwise,  directly or indirectly, in any Person other than the Company
     that (i) provides any services or designs, produces or sells any product or
     product lines or engages in any activity similar to or competitive with any
     activity  currently  proposed to be  conducted by the Company or any of its
     Subsidiaries  or (ii) has any direct or  indirect  interest in any asset or
     property, real or personal, tangible or intangible, of the Company.


                                      -12-

<PAGE>


          (w) Registration  Rights.  Except with respect to registration  rights
     granted in  connection  with (i) 20,000  options to purchase  Common Shares
     granted to The Equity Group,  Inc.;  (ii) Section 8 hereof;  (iii) the 1997
     Securities  Purchase  Agreement;  and (iv) 94,072  Common  Shares  owned by
     Gregory J. Frazer,  the Company will not, as of the Closing  Date, be under
     any obligation to register any of its securities under the Securities Act.

          (x) Private  Offering.  Neither  the Company nor anyone  acting on its
     behalf  has sold or has  offered  any of the  Securities  for  sale to,  or
     solicited  offers to buy from, or otherwise  approached or negotiated  with
     respect  thereto with, any prospective  purchaser of the Securities,  other
     than the  Investor.  Neither the  Company  nor anyone  acting on its behalf
     shall  offer the  Securities  for issue or sale to, or solicit any offer to
     acquire any of the same from,  anyone so as to bring the  issuance and sale
     of such Securities, or any part thereof, within the provisions of Section 5
     of the Securities Act. Based upon the  representations  of the Investor set
     forth in Section 5 hereof,  the offer,  issuance and sale of the Securities
     are and  will be  exempt  from the  registration  and  prospectus  delivery
     requirements  of the Securities  Act, and have been registered or qualified
     (or are exempt from registration and qualification) under the registration,
     permit or qualification requirements of all applicable provincial and state
     securities laws.

          (y) Illegal or Unauthorized Payments; Political Contributions. Neither
     the Company nor any of its  Subsidiaries  nor, to the best of the Company's
     knowledge  (after  reasonable   inquiry  of  its  executive   officers  and
     directors), any of the current officers and directors of the Company or any
     of its Subsidiaries,  has,  directly or indirectly,  made or authorized any
     payment,  contribution or gift of money,  property,  or services,  (a) as a
     kickback or bribe to any Person or (b) to any  political  organization,  or
     the holder of or any aspirant to any elective or  appointive  public office
     except for personal political  contributions not involving the use of funds
     of the Company or any of its Subsidiaries.

          (z)  Material   Facts.   This  Agreement,   the  schedules   furnished
     contemporaneously   herewith,   and  the   other   agreements,   documents,
     certificates  or written  statements  furnished  or to be  furnished to the
     Investor  through  the  Closing  Date by or on  behalf  of the  Company  in
     connection with the transactions  contemplated  hereby taken as a whole, do
     not  contain  any untrue  statement  of a material  fact or omit to state a
     material fact necessary to make the statements contained therein or herein,
     in light of the  circumstances  in which  they were made,  not  misleading.
     Except for  factors  affecting  the  economy or the  health  care  industry
     generally, there is no fact which is known to the


                                      -13-

<PAGE>


     Company and which has not been disclosed herein or otherwise by the Company
     to the  Investor  which is  reasonably  likely to have a  Material  Adverse
     Effect.

          (aa) No  Integrated  Offering.  Neither  the  Company,  nor any of its
     affiliates,  nor  any  person  acting  on  its  behalf,  has,  directly  or
     indirectly,  made any  offers or sales of any  security  or  solicited  any
     offers  to  buy  any  security  under   circumstances  that  would  require
     registration  of the  Securities  being offered hereby under the Securities
     Act or the filing of any prospectus under any Canadian securities laws.

          (bb) Accounts  Receivable.  All Accounts  Receivable payable to or for
     the benefit of the Company that will be  reflected  on the audited  balance
     sheet of the  Company  as of July  31,  1999  (the  "1999  Audited  Balance
     Sheet"),   were  legally  and  validly  incurred   pursuant  to  bona  fide
     transactions  in the ordinary course of business and have been collected or
     are (or will be)  current  and  collectible  in  amounts  not less than the
     aggregate  amount thereof,  net of reserves,  carried (or to be carried) on
     the books of the Company in  accordance  with GAAP,  and are not subject to
     any counterclaims or set-offs which are not recorded in the accounts of the
     Company.  Reserves  established against Accounts Receivable are sufficient,
     and have been  calculated in accordance  with GAAP and consistent with past
     practices.  The  Company  has no  knowledge  of any facts or  circumstances
     generally  (other than general economic  conditions)  which would result in
     any material increase in the uncollectibility of the Accounts Receivable as
     a class in  excess  of the  reserves  therefor  to be set forth on the 1999
     Audited Balance Sheet. "Accounts Receivable" means all accounts,  notes and
     leases receivable of the Company existing as of a given time.

     4. Covenants of the Company. The Company covenants and agrees that:

          (a) Representations and Warranties.  The Company will not, without the
     Investor's prior written consent, take any action prior to the Closing Date
     which would result in any of the representations or warranties contained in
     this Agreement not being true at and as of the time immediately  after such
     action,  or in any of the Company's  covenants  contained in this Agreement
     becoming  incapable of  performance.  The Company will promptly  advise the
     Investor  of any  action or event of which it becomes  aware  which has the
     effect of making  incorrect  any of such  representations  or warranties or
     which has the  effect  of  rendering  any of such  covenants  incapable  of
     performance; and

          (b) Board of Directors.  From and after the Closing  Date,  and for so
     long as the Investor owns beneficially


                                      -14-

<PAGE>


     (within the meaning of Rule 13d-3 under the Exchange  Act) at least 666,666
     outstanding Common Shares or Convertible Shares (as appropriately  adjusted
     for any stock splits,  consolidations  or the like),  the Company shall use
     its  reasonable  best  efforts to fix and  maintain the number of Directors
     that shall  constitute  the entire  Board of  Directors of the Company (the
     "Board")  to be not less than seven (7) nor more than eleven  (11).  For so
     long as the Investor  owns  beneficially  (within the meaning of Rule l3d-3
     under  the  Exchange  Act)  a  number  of  outstanding   Common  Shares  or
     Convertible  Shares  constituting  at least 10% of the  outstanding  Common
     Shares (which for this purpose  shall  include the Common  Shares  issuable
     upon the  conversion  of the  Convertible  Shares but not the Common Shares
     issuable upon the exercise of the Warrants),  the Company will nominate and
     use its  reasonable  best  efforts to cause to be  elected  and to cause to
     remain as  directors  on the  Board  three (3)  persons  designated  by the
     Investor,  who shall be reasonably  satisfactory to the Company and subject
     to  applicable  law, such number to increase to four (4) if and for as long
     as the number of Directors that shall  constitute the entire Board shall be
     in excess of eight (8).  Such number of directors to be  designated  by the
     Investor  shall be (i) decreased by one if the Investor  owns  beneficially
     (within  the  meaning of Rule  l3d-3  under the  Exchange  Act) a number of
     outstanding Common Shares or Convertible Shares  constituting less than 10%
     of the outstanding  Common Shares (which for this purpose shall include the
     Common Shares  issuable upon the conversion of the  Convertible  Shares but
     not the Common Shares issuable upon the exercise of the Warrants), and (ii)
     decreased to none if the Investor owns beneficially  (within the meaning of
     Rule l3d-3 under the  Exchange  Act) less than 666,666  outstanding  Common
     Shares or  Convertible  Shares  (as  appropriately  adjusted  for any stock
     splits,  consolidations  or the like).  The  Investor  shall,  during  such
     period,  have the right to designate a person,  reasonably  satisfactory to
     the Company and subject to applicable  law, to fill any vacancy  created by
     the  death,  disability,  retirement  or  removal  of any  such  individual
     previously designated by the Investor. The Company shall pay all reasonable
     out-of-pocket expenses incurred by the Directors designated by the Investor
     in connection  with attending  Board meetings or transacting  other Company
     business.

          In the event that the  Investor  shall  transfer to any one  purchaser
     beneficial  ownership  (within the meaning of Rule 13d-3 under the Exchange
     Act) of at least 1,333,333 outstanding  Convertible Shares or Common Shares
     issued upon conversion of Convertible Shares (all as appropriately adjusted
     for any stock splits, consolidations or the like), then the Investor in its
     discretion  may transfer to such  purchaser  its right to designate one (1)
     director as provided above. If so transferred, such right shall not be


                                      -15-

<PAGE>


     further  transferable  and shall  terminate at such time as such  purchaser
     shall own beneficially less than 666,666 outstanding  Convertible Shares or
     such Common Shares (as so adjusted). Any such purchaser's designee shall be
     reasonably satisfactory to the Company and subject to applicable law.

          (c) Use of  Proceeds.  The  proceeds  received by the Company from the
     issuance  and sale of the  Securities  shall be used by the Company to make
     acquisitions and for working capital purposes.

          (d) Financial and Business  Information.  The Company shall deliver to
     the Investor:

               (i) Monthly and  Quarterly  Statements - as soon as  practicable,
          and in any event  within 30 days after the close of each month of each
          fiscal  year of the Company in the case of monthly  statements  and 45
          days after the close of each of the first  three  fiscal  quarters  of
          each fiscal year of the Company in the case of quarterly statements, a
          consolidated balance sheet,  statement of income and statement of cash
          flows of the  Company  and any  subsidiaries  as at the  close of such
          month or quarter and covering operations for such month or quarter, as
          the case may be, and the portion of the  Company's  fiscal year ending
          on the last day of such month or quarter, all in reasonable detail and
          prepared  in  accordance  with  GAAP,  subject  to audit and  year-end
          adjustments,  setting  forth  in each  case in  comparative  form  the
          figures for the  comparable  period of the previous  fiscal year.  The
          Company   shall  also  provide   comparisons,   on  a  quarterly   and
          year-to-date  basis,  of each pertinent item to the budget referred to
          in subsection  (iii) below;  such  statement  shall  include,  without
          limitation,  the results of  operations  for all clinics  owned by the
          Company  during  the same  period  of both the  current  and the prior
          fiscal year.

               (ii) Annual  Statements - as soon as practicable after the end of
          each  fiscal  year of the  Company,  and in any  event  within 90 days
          thereafter, duplicate copies of:

                    (A) a  consolidated  balance  sheet of the  Company  and any
               subsidiaries at the end of such year; and

                    (B) consolidated statements of income,  stockholders' equity
               and cash flows of the Company and any subsidiaries for such year,
               setting  forth in each case in  comparative  form the figures for
               the  previous   fiscal  year,   all  in  reasonable   detail  and
               accompanied by an opinion thereon of


                                      -16-

<PAGE>


               independent certified public accountants of recognized national
               standing selected by the Company.

               (iii) Business Plan; Projections - no later than 30 days prior to
          the  commencement  of each  fiscal  year  of the  Company,  an  annual
          business  plan of the Company  and  operating  results,  prepared on a
          monthly  basis,  and a three year  business  plan of the  Company  and
          projections of operating results.  Such business plans and projections
          shall  contain such  substance and detail and shall be in such form as
          will be reasonably acceptable to the Investor.

               (iv) Audit Reports - promptly upon receipt  thereof,  one copy of
          each other financial  report and internal  control letter submitted to
          the Company by independent  accountants in connection with any annual,
          interim or special audit made by them of the books of the Company.

               (v) Other Reports - promptly upon their becoming  available,  one
          copy of: each financial statement,  report,  notice or proxy statement
          sent  by  the  Company  to  stockholders  generally;   each  financial
          statement,  report,  notice or definitive  proxy statement sent by the
          Company or any of its  subsidiaries to the Commission or any successor
          agency or any Canadian securities regulatory authority, if applicable;
          each  regular  or  periodic  report  and any  registration  statement,
          prospectus or written  communication  (other than transmittal letters)
          in respect  thereof  filed by the Company or any  subsidiary  with, or
          received by such Person in connection  therewith from, any domestic or
          foreign securities exchange, the Commission or any successor agency or
          any foreign regulatory  authority  performing functions similar to the
          Commission; any press release issued by the Company or any subsidiary;
          and any material  communications of any nature whatsoever  prepared by
          the  Commission  or any  successor  agency  thereto  or  any  Canadian
          securities  regulatory  authority or any state blue sky or  securities
          law  commission  which relates to or affects in any way the Company or
          any subsidiary.

               (vi) Progress Report - prior to each regularly  scheduled meeting
          of the Board of Directors of the  Company,  a narrative  report of the
          Company's activities since the date of the last such report, including
          a description of business development, operating results and marketing
          efforts.

               (vii) Requested  Information - with reasonable  promptness,  such
          other data and information as from


                                      -17-

<PAGE>


          time to time may be reasonably requested by the Investor.

          (e) Audit Report. The Company agrees to cause an audit to be performed
     by  KPMG  Peat  Marwick  LLP  no  later  than  October  31,  1999,  of  its
     consolidated   balance  sheet  as  of  July  31,  1999,   and  the  related
     consolidated statements of operations,  shareholders' equity and cash flows
     for the fiscal year ended July 31, 1999 (collectively,  the "1999 Financial
     Statements").  The 1999 Financial  Statements will comply as to form in all
     material respects with applicable accounting requirements of the Securities
     Act or the Exchange Act, as  applicable,  and with the published  rules and
     regulations  of the  Commission  with respect  thereto.  The 1999 Financial
     Statements  (i) will be  prepared  in  accordance  with GAAP  applied  on a
     consistent  basis  (except  as may be  indicated  therein  or in the  notes
     thereto), (ii) will present fairly, in all material respects, the financial
     position of the Company and its  Subsidiaries  as at the dates  thereof and
     the results of their  operations and cash flows for the periods then ended,
     and (iii) will be, in all material  respects,  in accordance with the books
     of account and records of the Company except as indicated therein.

          (f) Inspection.  The Company shall permit the Investor,  its nominees,
     and  representatives  to visit and  inspect  any of the  properties  of the
     Company and its Subsidiaries, to examine all its books of account, records,
     reports and other  papers not  contractually  required of the Company to be
     kept confidential or secret, to make copies and extracts therefrom,  and to
     discuss its affairs,  finances and accounts  with the  Company's  officers,
     directors,  key employees and independent public accountants or any of them
     (and by this provision the Company  authorizes said  accountants to discuss
     with such  Investor,  its  nominees  and  representatives  the finances and
     affairs of the Company and its Subsidiaries),  all at such reasonable times
     and as often as may be reasonably requested.

          (g) Takeover Statute.  If any corporate  takeover  provision under the
     laws of any  provincial,  state  or  federal  "fair  price",  "moratorium",
     "control  share  acquisition"  or other  similar  antitakeover  statute  or
     regulation shall become applicable to the transactions contemplated hereby,
     the Company and the members of the Board shall, to the extent  permitted by
     applicable law, grant such approvals and take such actions as are necessary
     so that the transactions contemplated hereby may be consummated as promptly
     as  practicable  on the terms  contemplated  hereby  and  otherwise  act to
     eliminate  or minimize  the effects of such  statute or  regulation  on the
     transactions contemplated hereby.

          (h) Conduct of Business and Maintenance of Existence. The Company will
     continue to engage in business of the same


                                      -18-

<PAGE>


     general type as now conducted by it, and  preserve,  renew and keep in full
     force and effect its corporate  existence and take all reasonable action to
     maintain all rights,  privileges and  franchises  necessary or desirable in
     the normal conduct of its business.

          (i) Compliance with Laws. The Company and its subsidiaries will comply
     in all material respects with all applicable laws,  rules,  regulations and
     orders except where the failure to comply would not have a Material Adverse
     Effect.

          (j) Insurance.  The Company will maintain  insurance with  responsible
     and  reputable  insurance  companies  or  associations  in such amounts and
     covering such risks as is usually  carried by companies of similar size and
     credit standing engaged in similar business and owning similar  properties,
     provided  that such  insurance  is and remains  available to the Company at
     commercially reasonable rates.

          (k) Keeping of Books. The Company will keep proper books of record and
     account,  in which full and correct  entries shall be made of all financial
     transactions   and  the  assets  and   business  of  the  Company  and  its
     subsidiaries in accordance with GAAP.

          (l) Lost, etc. Certificates  Evidencing Securities (or Common Shares);
     Exchange.  Upon receipt by the Company of evidence reasonably  satisfactory
     to it of the loss,  theft,  destruction  or mutilation  of any  certificate
     evidencing any  Securities or Common Shares owned by the Investor,  and (in
     the  case  of  loss,  theft  or  destruction)  of  an  unsecured  indemnity
     satisfactory to it, and upon reimbursement to the Company of all reasonable
     expenses  incidental  thereto,  and upon surrender and cancellation of such
     certificate,  if  mutilated,  the Company  will make and deliver in lieu of
     such  certificate  a new  certificate  of like  tenor and for the number of
     securities  evidenced by such  certificate  which remain  outstanding.  The
     Investor's agreement of indemnity shall constitute  indemnity  satisfactory
     to the Company for purposes of this  Section  4(l).  Upon  surrender of any
     certificate  representing any securities of the Company for exchange at the
     office of the  Company,  the Company at its expense will cause to be issued
     in exchange therefor new certificates in such denomination or denominations
     as may be requested for the same aggregate number of securities represented
     by the  certificate  so  surrendered  and  registered  in the  name  of the
     Investor.

          (m) Limitations on Corporate  Actions.  The Company shall not, without
     the consent of the Investor,  such consent not to be unreasonably withheld,
     (A) sell,  lease,  exchange or  transfer  all or  substantially  all of its
     assets to any person other than an affiliate of the Company; (B)


                                      -19-

<PAGE>


     amalgamate  the Company with another  corporation  with the effect that the
     then existing  shareholders of the Company,  ordinarily having the right to
     vote in the  election  of  directors,  hold less  than 51% of the  combined
     voting power of the amalgamated  corporation;  (C) permit either Subsidiary
     to merge,  amalgamate or consolidate with or into another  corporation with
     the effect that the Company will hold less than 51% of the combined  voting
     power of the surviving corporation; (D) materially change the nature of the
     Company's business;  (E) effect a liquidation,  amalgamation or sale of the
     Company or sell  substantially all of its or its  Subsidiaries'  assets; or
     (F) except as  described in Schedule  4(m),  redeem or pay or permit any of
     its  Subsidiaries  to redeem or pay any  dividend  or  distribution  on its
     Common Shares.

          (n)  Commencement  and  Termination  of Covenants.  From and after the
     Closing Date, the obligations of the Company and the rights of the Investor
     set forth in Sections 4(d),  4(f),  4(h),  4(i),  4(j), 4(k) and 4(m) shall
     terminate once the Investor no longer owns beneficially (within the meaning
     of Rule l3d-3 under the Exchange Act) at least 666,666  outstanding  Common
     Shares or  Convertible  Shares  (as  appropriately  adjusted  for any stock
     splits, consolidations or the like).

          (o) Form D Filing.  The  Company  will  timely file a Form D under the
     Securities Act in connection with the offer and sale of the Securities.

          (p)  Brokerage.  The Company agrees to indemnify and hold the Investor
     harmless  against  any costs or damages  incurred as a result of any claims
     for  brokerage  commissions  or finder's  fees or similar  compensation  in
     connection  with the  transactions  contemplated by this Agreement based on
     any arrangement made by or on behalf of the Company.

          (q)  Shareholder  Approval  of the Series A  Amendment.  At its annual
     meeting of  shareholders  scheduled for December 15, 1999, the Company will
     submit  for  approval  by a  special  resolution  of its  shareholders  the
     articles of amendment (the "Series A Amendment")  amending the terms of the
     Series A  Convertible  Shares in the form of Exhibit B hereto.  The Company
     will,  through  its  Board  of  Directors,  recommend  to its  shareholders
     approval  of  the  Series  A  Amendment,  such  recommendation  not  to  be
     withdrawn,  modified or amended.  The Company shall use all best efforts to
     obtain the required  shareholder approval of the Series A Amendment at such
     meeting  and,  if  approval is not  obtained  at such  meeting,  as soon as
     possible thereafter.

          (r)  Series  A  Amendment.  Promptly  after  receipt  of the  required
     shareholder approval, the Company shall file the


                                      -20-

<PAGE>


     Series A Amendment with the Registrar of Corporations  of Yukon  Territory,
     Canada (the "Registrar").

          (s) Shareholder  Election of Investor Designee.  At its annual meeting
     of  shareholders  scheduled for December 15, 1999,  the Company will submit
     for election to the Board of Directors by its  shareholders  David Wenstrup
     or, in his place,  any other  designee of the  Investor.  The Company will,
     through its Board of Directors,  recommend to its shareholders  election of
     Mr.  Wenstrup  or  such  other  designee,  such  recommendation  not  to be
     withdrawn,  modified or amended.  The Company shall use all best efforts to
     obtain the  required  shareholder  vote  necessary  for the election of Mr.
     Wenstrup or such other designee at the annual meeting, and, if the required
     vote is not obtained at the annual meeting, as soon as possible thereafter.

          (t)  Listing.  The  Company  shall  use all best  efforts  to have the
     American  Stock  Exchange   ("Amex")  approve  for  listing,   as  soon  as
     practicable following the Closing Date, the Common Shares issuable upon the
     conversion of the Series B Convertible  Shares.  Prior to the Closing Date,
     the  Company  shall file with Amex the  listing  application  and all other
     documents  required  by Amex to list the Common  Shares  issuable  upon the
     conversion of the Series B Convertible Shares.

     5.  Representations,  Warranties and Covenants of the Investor;  Additional
Covenants of the Company.

          (a) General. The Investor hereby represents and warrants that:

               (i) it has full power and  authority,  corporate  and  other,  to
          execute,   deliver  and  perform  the  Transaction  Documents  and  to
          consummate the  transactions  contemplated  thereby and to perform its
          obligations thereunder. This Agreement has been, and as of the Closing
          Date the Amended and Restated Warrant Agreement will be, duly executed
          and delivered by the Investor.  This Agreement constitutes,  and as of
          the Closing  Date the  Amended and  Restated  Warrant  Agreement  will
          constitute,   the  valid  and  binding   obligation  of  the  Investor
          enforceable against the Investor in accordance with their terms;

               (ii) it is an  "accredited  investor"  within the meaning of Rule
          501(a) of Regulation D under the Securities Act, and will purchase the
          Securities  and the Common  Shares  issuable on the  conversion of the
          Convertible  Shares  and  the  exercise  of the  Warrants  for its own
          account  and  not  with  a  view  to  any  distribution  thereof  in a
          transaction  that would violate the  Securities  Act or the securities
          laws of any State of


                                      -21-

<PAGE>


          the United States or any other applicable  jurisdiction,  but subject,
          nevertheless,  to any  requirement of law that the  disposition of the
          Investor's  property  shall at all  times  be  within  the  Investor's
          control, and without prejudice to the Investor's right at all times to
          sell or otherwise  dispose of all or any part of such securities under
          a  registration  statement  under  the  Securities  Act  or  under  an
          exemption from said registration available under the Securities Act;

               (iii) it  understands  that an  investment in the Company bears a
          high  degree of risk and  represents  that it has such  knowledge  and
          experience  in financial  and  business  matters that it is capable of
          evaluating  the merits and risks of purchasing  the Securities and the
          Common Shares  issuable upon exercise of the Warrants,  and is able to
          bear the economic risks of its investment for an indefinite  period of
          time; and

               (iv) it has  received  copies of the  Company SEC Reports and has
          had  access  to such  financial  and other  information,  and has been
          afforded the opportunity to ask such questions of  representatives  of
          the Company and receive  answers  thereto,  as it deems  necessary  in
          connection with its purchase of the Securities.

          (b)  Disclosure  and  Non-Public  Information.  As to so  much  of the
     information  and other material  furnished under or in connection with this
     Agreement (whether furnished before, on or after the date hereof, including
     without limitation  information furnished pursuant to Sections 4(d) and (f)
     hereof) as constitutes or contains non-public business,  financial or other
     information of the Company or its Subsidiaries ("Non-Public  Information"),
     the Investor covenants for itself and its directors,  officers and partners
     that it will use due care to prevent  its  officers,  directors,  partners,
     employees,   counsel,   accountants  and  other  representatives  from  (i)
     disclosing any Non-Public  Information to Persons other than the Investor's
     authorized employees, counsel, accountants, shareholders, partners, limited
     partners  and other  authorized  representatives  or (ii) using  Non-Public
     Information  in any manner that would  constitute  a violation  of Canadian
     federal or provincial or U.S. federal or state  securities laws;  provided,
     however, that the Investor may disclose or deliver any information or other
     material  disclosed to or received by it should such Investor be advised by
     its  counsel  (such  writing  to be  delivered  to the  Company)  that such
     disclosure  or  delivery  is  required  by law,  regulation  or judicial or
     administrative  order.  In the event of any  termination  of this Agreement
     prior to the Closing  Date,  the  Investor  shall return to the Company all
     confidential   material  previously  furnished  to  such  Investor  or  its
     officers,  directors,  partners,  employees, counsel, accountants and other
     representatives in


                                      -22-

<PAGE>


     connection with this  transaction.  For purposes of this Section 5(b), "due
     care" means at least the same level of care that such Investor would use to
     protect  the   confidentiality   of  its  own   sensitive  or   proprietary
     information,   and  this  obligation  shall  survive  termination  of  this
     Agreement.

          (c)  Securities  Act  Matters.  The  Investor  acknowledges  that  the
     Securities  are being  offered in a  transaction  not  involving any public
     offering  within the meaning of the  Securities Act and that the Securities
     and the Common  Shares  issuable  upon the  conversion  of the  Convertible
     Shares and the exercise of the Warrants have not been registered  under the
     Securities Act, or under the securities laws of any province of Canada, and
     agrees that it will not sell or otherwise  transfer the  Securities  except
     pursuant to an effective registration statement under the Securities Act or
     Canadian  securities  laws or in a  transaction  which,  in the  opinion of
     counsel  reasonably  satisfactory  to the  Company,  qualifies as an exempt
     transaction  under  the  Securities  Act  and  the  rules  and  regulations
     promulgated thereunder. The Investor acknowledges that certificates for the
     Securities  and  such  Common  Shares  will  bear a legend  reflecting  the
     substance of this Section 5(c) and that  appropriate  stop transfer  orders
     may be lodged with respect thereto.

          (d)  Limitation on Transfer.  The Investor  agrees that it shall in no
     event sell or  otherwise  transfer (i) any of the  Securities  for a period
     ending six months  from the Closing  Date or (ii) any of the Common  Shares
     issuable upon the  conversion or exercise of the Securities for a period of
     six months from the  Closing  Date.  If such Common  Shares are issued on a
     date later  than six months  from the  Closing  Date,  they shall be freely
     transferable, subject to applicable securities laws.

          (e) No Intention of Board to Pay Dividends.  The Investor acknowledges
     that the Board of Directors of the Company has no obligation to declare and
     has no present  intention of  declaring  any  dividends on the  Convertible
     Shares,  but that such dividends will nevertheless  accumulate  pursuant to
     the terms of the Convertible Shares.

          (f) Consents  and  Approvals.  The Company and the  Investor  will use
     their  respective   reasonable  best  efforts  to  obtain  as  promptly  as
     practicable any consent or approval of any Person, including any regulatory
     authority,  required  in  connection  with  the  transactions  contemplated
     hereby.

          (g) Vote by Investor.  The Investor  hereby  agrees to vote all of the
     Series A  Convertible  Shares  and all of the Series B  Convertible  Shares
     owned  by it in  favor  of  the  Series  A  Amendment  at  the  meeting  of
     shareholders  scheduled  for  December  15,  1999  or  at  any  meeting  of
     shareholders of


                                      -23-

<PAGE>


     the Company at which the Series A Amendment is submitted for shareholder
     approval.

     6. Conditions to Closing.

          (a) The obligations of the Investor  hereunder at the Closing shall be
     subject to the performance by the Company of all its obligations  hereunder
     to be performed  on or prior to the Closing  Date and to the  satisfaction,
     prior thereto or concurrently therewith, of the following conditions:

               (i)  Representations  and  Warranties.  The  representations  and
          warranties of the Company contained in this Agreement shall be true on
          and  as  of  the   Closing   Date  as  though  such   warranties   and
          representations  were made on and as of such date, except as otherwise
          affected by the transactions contemplated hereby.

               (ii) Compliance with Agreement.  The Company shall have performed
          and complied with all agreements,  covenants and conditions  contained
          in this Agreement  which are required to be performed or complied with
          by the Company prior to or on the Closing Date.

               (iii) No Legislation or Injunction. There shall have been adopted
          no law or regulation and there shall be no effective injunction, writ,
          preliminary  restraining  order or any order of any nature issued by a
          court of competent jurisdiction  prohibiting the transactions provided
          for in the Transaction Documents or any of them from being consummated
          as herein provided.

               (iv) Adverse Developments.  There shall have been no developments
          in the business of the Company or any of its Subsidiaries which in the
          reasonable  opinion of the  Investor  would  have a  Material  Adverse
          Effect.

               (v) Consents and Approvals.  Except for  shareholder  approval of
          the   Series   A   Amendment,   all   filings,   consents,    waivers,
          authorizations,  licenses, permits,  certificates and approvals of any
          Person  required  to have  been  made or  obtained  on or prior to the
          Closing  Date  in  connection   with  the   execution,   delivery  and
          performance of this Agreement,  all of which are set forth on Schedule
          3(f)  hereto,  shall have been duly made or  obtained  and shall be in
          full force and effect on the Closing Date.

               (vi) Officers'  Certificate.  The Company shall have delivered to
          the  Investor  a  certificate  of the  Company's  Chairman  and  Chief
          Executive Officer,  dated as of the Closing Date,  certifying that the
          conditions


                                      -24-

<PAGE>


          specified in the foregoing Sections 6(a)(i) through (v) hereof have
          been fulfilled.

               (vii)  Opinions of Counsel.  The Investor shall have received (a)
          from Ballem MacInnes,  counsel to the Company, a legal opinion,  dated
          as of the  Closing  Date,  in  substantially  the form of Exhibit  D-1
          hereto,  (b) from Davis & Company,  counsel  to the  Company,  a legal
          opinion,  dated as of the Closing Date, in  substantially  the form of
          Exhibit  D-2  hereto,  and (c)  from  Miller,  Nash,  Wiener,  Hager &
          Carlsen,  LLP, United States counsel to the Company,  a legal opinion,
          dated as of the Closing Date, in substantially the form of Exhibit D-3
          hereto;

               (viii) Secretary's Certificate.  The Investor shall have received
          a certificate, dated the Closing Date, of the Secretary of the Company
          attaching (i) a true and complete copy of the constating  documents of
          the  Company,  with all  amendments  thereto,  (ii) true and  complete
          copies of the  Company's  By-Laws  in effect  as of such  date,  (iii)
          certificates  of good  standing of the  appropriate  officials  of the
          jurisdictions  of incorporation of the Company and each Subsidiary and
          of each  jurisdiction  in which the  Company  and each  Subsidiary  is
          qualified to do business as a foreign corporation, (iv) resolutions of
          the Board  authorizing  the execution and delivery of the  Transaction
          Documents and the transactions  contemplated  thereby, the issuance of
          the Securities and the reservation for issuance of a sufficient number
          of Common Shares into which the Securities  may be converted,  and the
          amendment amending the terms of the Series A Convertible Shares as set
          forth in Exhibit B hereto and (v) proof of filing of the  Articles  of
          Amendment to designate the Series B Convertible Shares as set forth in
          Exhibit C hereto.

               (ix)  Approval of  Proceedings.  All  proceedings  to be taken in
          connection with the transactions  contemplated by this Agreement,  and
          all documents  incident thereto,  shall be reasonably  satisfactory in
          form and  substance to the Investor and its special  counsel,  Willkie
          Farr & Gallagher;  and the Investor shall have received  copies of all
          documents or other  evidence which it and Willkie Farr & Gallagher may
          reasonably  request in connection  with such  transactions  and of all
          records of corporate  proceedings in connection  therewith in form and
          substance  reasonably  satisfactory to the Investor and Willkie Farr &
          Gallagher.

               (x) Warrant Agreement. The Amended and Restated Warrant Agreement
          shall have been executed and delivered.


                                      -25-

<PAGE>


               (xi)  Filing of  Articles of  Amendment.  The Company  shall have
          filed or caused to be filed with the  Registrar  Articles of Amendment
          to amend the Company's Articles of Continuance to designate the Series
          B  Convertible  Shares,  such  series  to have the  terms set forth in
          Exhibit C, and such Articles of Amendment shall have been accepted for
          filing by the Registrar.

               (xii)  Directors.  As of the Closing Date,  David  Wenstrup shall
          have been appointed to the Board.

               (xiii)  The  Company  shall  have  filed  with  Amex the  listing
          application  and all  other  documents  required  by Amex to list  the
          Common Shares issuable upon the conversion of the Series B Convertible
          Shares.

          (b) The  obligations of the Company at the Closing shall be subject to
     the performance by the Investor of all of its  obligations  hereunder to be
     performed  on or prior to the Closing Date and to the  satisfaction,  prior
     thereto or concurrently therewith, of the following conditions:

               (i) Consents and Approvals.  Except for  shareholder  approval of
          the   Series   A   Amendment,   all   filings,   consents,    waivers,
          authorizations,  licenses, permits,  certificates and approvals of any
          Person  required  to have  been  made or  obtained  on or prior to the
          Closing  Date  in  connection   with  the   execution,   delivery  and
          performance of this Agreement,  all of which are set forth on Schedule
          3(f)  hereto,  shall have been duly made or  obtained  and shall be in
          full force and effect on the Closing Date.

               (ii) No Legislation or Injunction.  There shall have been adopted
          no law or regulation and there shall be no effective injunction, writ,
          preliminary  restraining  order or any order of any nature issued by a
          court of competent jurisdiction  prohibiting the transactions provided
          for in the Transaction Documents or any of them from being consummated
          as herein provided.

               (iii)  General  Partner's  Certificate.  The Investor  shall have
          delivered to the Company a certificate  of the General  Partner of the
          Investor,  dated as of the  Closing  Date,  affirming  the  continuing
          accuracy as of the Closing Date, of the representations and warranties
          and the  performance  of all  agreements  made by the Investor in this
          Agreement.

     7.  Expenses of Sale.  In the  absence of a default by the  Investor in the
performance of its  obligations  hereunder,  the Company shall pay, or reimburse
the Investor for all reasonable  out-of-pocket expenses incurred by the Investor
in connection


                                      -26-

<PAGE>


with this  transaction,  including without  limitation,  the reasonable fees and
disbursements of its counsel in connection  herewith.  The Company shall pay all
finders' or brokers' fees or similar payments  incurred by it in connection with
the transactions  contemplated hereby. The Investor represents and warrants that
it has not  incurred  any  liability  for,  and is unaware of any claim for, any
finders'  or  brokers'  fees  or  similar   payments  in  connection   with  the
transactions contemplated hereby.

     8. Registration Rights.

          (a) For the purpose of this Section 8, the term "Registerable  Shares"
     shall mean (i) the Common Shares issuable upon the conversion of the Series
     B Convertible Shares, and (ii) any share capital of the Company issued as a
     dividend or other  distribution  with  respect to, or in exchange for or in
     replacement of, the Common Shares referred to in clause (i).

          (b) At any time  subsequent to 180 days after the date of the Closing,
     the Investor may request, in writing, that the Company register all or part
     of the  Registerable  Shares issued,  or issuable,  upon  conversion of the
     Series B  Convertible  Shares  for resale  under the  Securities  Act.  The
     Company will, as soon as practicable after receipt of such request, prepare
     and file with the Commission,  at the Company's own expense, a registration
     statement under the Securities Act sufficient to permit the public offering
     of all or such  portion  of such  Common  Shares as are  specified  in such
     request.  The Company  will use its  reasonable  best efforts to cause such
     registration  statement  to  become  effective  under  the  Securities  Act
     (including,  without  limitation,  the execution of an  undertaking to file
     post-effective amendments,  appropriate qualification under applicable blue
     sky  or  other  state  securities  laws  and  appropriate  compliance  with
     applicable  regulations  issued  under the  Securities  Act) as promptly as
     practicable.  The  Company  shall  only  be  obligated  to  file  one  such
     registration   statement   under  this  Section  8(b)  provided  that  such
     registration  statement  pursuant  to this  Section  8(b)  shall  have been
     declared or ordered  effective  and the sales of such Common  Shares  shall
     have been  closed.  However,  if the sales of such  Common  Shares have not
     closed,  the Investor may preserve its one demand  registration right under
     this Section  8(b) by paying all the  Company's  Registration  Expenses (as
     defined  below)  associated  with the  registration  of such Common Shares;
     provided  that such  right  may not be  exercised  until 90 days  after the
     effective date of such registration statement.

          (c) If the Investor  intends to  distribute  the  Registerable  Shares
     covered  by  its  request   pursuant  to  Section   8(b)  by  means  of  an
     underwriting, it shall so advise


                                      -27-

<PAGE>


     the Company as a part of its request made pursuant to Section 8(b).

          If holders of securities of the Company other than Registerable Shares
     who are  entitled,  by  contract  with the  Company or  otherwise,  to have
     securities  included  in such a  registration  (the  "Other  Stockholders")
     request such inclusion,  the Investor shall offer to include the securities
     of such Other Stockholders in the underwriting and may condition such offer
     on their acceptance of the further applicable provisions of this Section 8.
     The Investor and the Company shall  (together  with all Other  Stockholders
     proposing to distribute their securities through such  underwriting)  enter
     into an underwriting agreement in customary form with the representative of
     the  underwriter  or  underwriters  selected for such  underwriting  by the
     Investor and  reasonably  acceptable  to the Company.  Notwithstanding  any
     other  provision  of this  Section  8, if the  representative  advises  the
     Investor in writing that  marketing  factors  require a  limitation  on the
     number of shares to be underwritten,  the securities of the Company held by
     Other  Stockholders  shall be excluded from such registration to the extent
     so required by such  limitation.  If,  after the  exclusion of such shares,
     further reductions are still required, the number of shares included in the
     registration  by the Investor  shall be reduced by such  minimum  number of
     shares as is necessary to comply with such request.  No Registerable Shares
     or any other  securities  excluded from the  underwriting  by reason of the
     underwriter's  marketing limitation shall be included in such registration.
     If the Investor or any Other  Stockholder  who has  requested  inclusion in
     such  registration  statement as provided above disapproves of the terms of
     the  underwriting,  such person may elect to withdraw  therefrom by written
     notice to the Company, the underwriter and the Investor, and the securities
     so  withdrawn  shall also be  withdrawn  from  registration.  If the person
     electing such  withdrawal is the Investor,  then the demand right exercised
     under Section 8(b) shall be preserved and may be exercised a second time if
     (A) the registration  statement  covering such underwriting is not declared
     or ordered  effective,  or (B) the  registration  statement  covering  such
     underwriting  is declared  effective  and (i) the sale of at least  100,000
     Common Shares by Other  Stockholders  pursuant to such  underwriting  shall
     close,  or (ii) the Investor pays all the Company's  Registration  Expenses
     (as defined below)  associated with the  registration of such Common Shares
     and 90 days shall  elapse  after the  effective  date of such  registration
     statement.  If the  underwriter  has not limited the number of Registerable
     Shares to be  underwritten,  the Company may include its securities for its
     own account in such registration if the representative so agrees and if the
     number of  Registerable  Shares which would otherwise have been included in
     such registration and underwriting will not thereby be limited.


                                      -28-

<PAGE>


          (d) If at any  time  subsequent  to 180  days  after  the  date of the
     Closing,  the Company  proposes to  register  any of its equity  securities
     under the Securities Act either for its own account or for the account of a
     security holder or holders exercising their respective demand  registration
     rights  (on a form other  than Form S-4 or S-8 or their  equivalents),  the
     Company will (i) promptly  notify the  Investor in writing  (which  written
     notice shall include,  to the extent known, a list of the  jurisdictions in
     which the Company intends to attempt to qualify such  securities  under the
     applicable blue sky or other state securities laws) that such  registration
     statement  will be filed and that the  Registerable  Shares  which are then
     held by the Investor will be included in such registration statement at its
     request and (ii) subject to the last sentence of this subsection (e), cause
     such registration  statement to cover all Registerable  Shares which it has
     been so  requested  to include by the  Investor,  provided  such request is
     delivered  to the Company not later than 20 days after such notice is given
     to the  Investor  and  specifies  the number of  Registerable  Shares to be
     included  in  the  proposed  registration  statement.  Notwithstanding  the
     foregoing  provisions,   if  such  registration  statement  relates  to  an
     underwritten  offering of Common Shares and the managing  underwriter shall
     inform  the  Company  and  the   Investor  in  writing  that  the  managing
     underwriter  believes  that the  number of Common  Shares  requested  to be
     included in such registration  statement would materially  adversely affect
     its ability to effect such offering,  then the Company will include in such
     registration  statement the number of Common Shares which the Company is so
     advised  can be sold in (or during the time of) such  offering  as follows:
     first,  all shares  proposed by the Company to be sold for its own account,
     and,  second,  such  Registerable  Shares  requested to be included in such
     registration statement, pro rata by the Investor and other security holders
     exercising  registration  rights on the basis of the number of Registerable
     Shares and other  Common  Shares so proposed to be sold by the Investor and
     by such other security holders and so requested to be included.

          (e) In connection  with any  registration  statement filed pursuant to
     this Section 8 (a  "Registration  Statement"),  the Company shall take such
     action as may be necessary to register or qualify the  Registerable  Shares
     registered  thereunder under the securities or Blue Sky laws of such states
     of the United States as shall reasonably be requested by the Investor,  and
     shall do any and all other  acts which may be  necessary  or  advisable  to
     permit the proposed sale or other disposition of such  Registerable  Shares
     in any such state; provided that in no event shall the Company be obligated
     in  connection  therewith  to  qualify  as a  foreign  corporation  in  any
     jurisdiction where it is not already so qualified,  or to execute a general
     consent for


                                      -29-

<PAGE>


     service of process in suits  other than those  arising out of the offer and
     sale of the Registerable  Shares, or to take any action which would subject
     it to taxation in any jurisdiction where it is not then so subject.

          (f) The  Company's  obligations  under this  Section 8 to register and
     qualify  Registerable Shares shall be conditioned in each instance upon the
     timely  receipt  by the  Company in  writing  of (i)  information  from the
     Investor as to the proposed plan of distribution of the Registerable Shares
     to  be  included  in  the  Registration  Statement,  and  (ii)  such  other
     information  as the Company may  reasonably  require  from the Investor for
     inclusion in the Registration Statement.

          (g) All  Registration  Expenses (as defined below) in connection  with
     each Registration Statement (or seeking or obtaining the opinion of counsel
     to the Company  under  Section 8(h) and, if in the sole  discretion  of the
     Company deemed  desirable,  any no-action  position of the Commission  with
     respect  to sales  pursuant  to Rule 144  under  the  Securities  Act),  in
     complying  with  applicable  state  securities  laws,  and with  any  other
     qualification  or compliance  pursuant to this Section 8, shall be borne by
     the Company.  All Selling Expenses (as defined below) shall be borne by the
     holders of the securities so registered pro rata on the basis of the number
     of their shares so registered.  The Company at its expense will furnish the
     Investor  with copies of such  Registration  Statement  and the  prospectus
     included  therein and in such quantities as may be reasonably  requested by
     the Investor. In connection with each Registration  Statement,  the Company
     shall furnish the Investor with such opinions of counsel,  comfort  letters
     of accountants, certificates and such other documents that are customary in
     connection  with  underwritten  public  offerings  and that are  reasonably
     requested by the Investor.  "Registration Expenses" shall mean all expenses
     incurred  by the  Company in  compliance  with  Sections  8(b)  through (e)
     hereof,  including,  without limitation,  all registration and filing fees,
     printing expenses,  fees and disbursements of counsel for the Company, fees
     and expenses of one counsel for all the holders of  Registerable  Shares in
     an amount not to exceed $15,000, blue sky fees and expenses and the expense
     of any special audits incident to or required by any such registration (but
     excluding the compensation of regular employees of the Company, which shall
     be paid in any event by the  Company).  "Selling  Expense"  shall  mean all
     brokerage fees,  underwriting  discounts and selling commissions applicable
     to the sale of Registerable Shares.

          (h) The Company  shall not be  required by this  Section 8 to file any
     Registration  Statement relating to the Registerable Shares of the Investor
     if the Company shall furnish the Investor with a written opinion of counsel


                                      -30-

<PAGE>


     reasonably  satisfactory  to the  Investor to the effect that the  proposed
     public  offering  or other  transfer  of  Registerable  Shares  as to which
     registration is requested is exempt from the  registration or qualification
     requirements of all applicable  federal and state securities laws and would
     result in all purchasers or transferees thereof obtaining  securities which
     are not "restricted securities" as defined in Rule 144 under the Securities
     Act.

          (i) If,  after the date  hereof,  the  Company  grants  to any  person
     registration  rights  which are more  favorable  to such  person than those
     afforded to the Investor  under this Section 8, the Investor  shall without
     further action be entitled to the benefits of such more favorable rights.

          (j) Registration Procedures. In the case of each registration effected
     by the  Company  pursuant  to this  Section  8, the  Company  will keep the
     Investor,  as  applicable,  advised in writing as to the initiation of each
     registration and as to the completion thereof. At its expense,  the Company
     will:

               (i) keep such registration  effective for a period of one hundred
          eighty (180) days or until the Investor has completed the distribution
          described in the registration  statement  relating thereto,  whichever
          first occurs; provided,  however, that in the case of any registration
          of Registerable Shares on Form S-3 which are intended to be offered on
          a continuous or delayed  basis,  such 180-day period shall be extended
          until all such Registerable  Shares are sold,  provided that Rule 415,
          or any successor rule under the Securities Act, permits an offering on
          a continuous or delayed basis,  and provided  further that  applicable
          rules under the  Securities  Act  governing  the  obligation to file a
          post-effective  amendment  permit,  in lieu of filing a post-effective
          amendment which (y) includes any prospectus  required by Section 10(a)
          of the Securities  Act or (z) reflects facts or events  representing a
          material or  fundamental  change in the  information  set forth in the
          registration statement,  the incorporation by reference of information
          required  to be  included  in (y) and (z)  above  to be  contained  in
          periodic reports filed pursuant to Section 13 or 15(d) of the Exchange
          Act in the registration statement;

               (ii)  furnish  such number of  prospectuses  and other  documents
          incident  thereto  as the  Investor  from time to time may  reasonably
          request;

               (iii) notify the Investor at any time when a prospectus  relating
          thereto is required to be delivered  under the  Securities  Act of the
          happening of any event as a result of which the prospectus included in
          such


                                      -31-

<PAGE>


          registration   statement,  as  then  in  effect,  includes  an  untrue
          statement  of a  material  fact or  omits  to  state a  material  fact
          required  to be stated  therein or  necessary  to make the  statements
          therein  not  misleading  in  the  light  of  the  circumstances  then
          existing; and

               (iv)  furnish,  on the date that  such  Registerable  Shares  are
          delivered to the  underwriters  for sale, if such securities are being
          sold through  underwriters  or, if such  securities are not being sold
          through underwriters, on the date that the registration statement with
          respect to such securities becomes effective, (1) an opinion, dated as
          of such date, of the counsel representing the Company for the purposes
          of such registration, in form and substance as is customarily given to
          underwriters  in  an  underwritten   public  offering  and  reasonably
          satisfactory  to the  Investor  addressed  to the  Investor  and (2) a
          letter,  dated as of such date, from the independent  certified public
          accountants  of the  Company,  in form and  substance  as is customary
          given by independent  certified public  accountants to underwriters in
          an  underwritten  public  offering and reasonably  satisfactory to the
          Investor  addressed to the  underwriters,  if any, and if permitted by
          applicable accounting standards, to the Investor.

          (k) Rule 144 Reporting.  With a view to making  available the benefits
     of certain rules and  regulations  of the  Commission  which may permit the
     sale of  restricted  securities  to the public  without  registration,  the
     Company agrees to:

               (i) make and keep public information available as those terms are
          understood  and  defined in Rule 144,  at all times from and after the
          Closing Date;

               (ii) use its reasonable  best efforts to file with the Commission
          in a timely  manner all  reports and other  documents  required of the
          Company  under the  Securities  Act and the  Exchange  Act at any time
          after it has become subject to such reporting requirements; and

               (iii)  so long as the  Investor  owns  any  Registerable  Shares,
          furnish to the  Investor  upon  request,  a written  statement  by the
          Company  as to its  compliance  with the  current  public  information
          requirements  of Rule  144(c)(1),  a copy of the most recent annual or
          quarterly report of the Company,  and such other reports and documents
          so filed as the Investor may reasonably  request in availing itself of
          any rule or regulation of the Commission allowing the Investor to sell
          any such securities without registration.


                                      -32-

<PAGE>


          (l) The  Company  shall  not be  required  to  effect  a  registration
     pursuant  to  Section  8(b)  if at the  time  of any  request  to  register
     Registerable  Shares,  the Company has filed or will file within 60 days of
     the time of the request a registration  statement  under the Securities Act
     with  respect to a public  offering  as to which the  Investor  may include
     Registerable  Shares  pursuant to Section  8(d).  The  Company  may, at its
     option,  direct that such  request be delayed for a period not in excess of
     three months from the effective date of such offering,  such right to delay
     a request to be exercised by the Company not more than once in any one-year
     period.

          (m)  Transfer  of  Registration  Rights.  The  rights  granted  to the
     Investor to cause the Company to register securities under Section 8(b) may
     be assigned to a  transferee  or  assignee in  connection  with the sale or
     other transfer of at least 100,000  Registerable  Shares (as  appropriately
     adjusted for any stock splits, consolidations,  or the like), provided that
     (i) such transfer may otherwise be effected in accordance  with  applicable
     securities laws, (ii) the Company is given reasonably prompt written notice
     of such  assignment,  and (iii) the rights  provided in Section 8(b) may be
     exercised  only once,  except as  otherwise  provided in this Section 8, by
     either the Investor or a transferee.

     9. Indemnification.

          (a) In the event of the filing of any Registration  Statement pursuant
     to Section 8 hereof,  the Company agrees to indemnify and hold harmless the
     Investor  and each person,  if any,  who  controls the Investor  within the
     meaning of the Securities Act, against any and all losses,  claims, damages
     or  liabilities,  joint or several  (including  the costs of any reasonable
     investigation and legal and other expenses incurred in connection with, and
     any amount paid in  settlement  of, any action,  suit or  proceeding or any
     claim asserted) to which they, or any of them, may become subject under the
     Securities  Act,  the  Exchange  Act  or  other  federal  or  state  law or
     regulation,  at common law or  otherwise,  insofar as such losses,  claims,
     damages or liabilities (or actions in respect  thereof) arise out of or are
     based upon any untrue  statement or alleged untrue  statement of a material
     fact contained in such Registration  Statement,  or any related preliminary
     prospectus,  final prospectus,  or amendment thereof or supplement thereto,
     or arise out of or are based upon any omission or alleged omission to state
     therein a material fact required to be stated  therein or necessary to make
     the statements therein, in light of the circumstances under which they were
     made,  not  misleading;  provided,  however,  that the Company shall not be
     liable under this Section 9(a) in any such case to the extent that any such
     losses, claims, damages or liabilities arise solely


                                      -33-

<PAGE>


     out of or are based upon an untrue  statement of a material fact  contained
     in or any  omission of a material  fact from such  Registration  Statement,
     preliminary prospectus, final prospectus or amendment thereof or supplement
     thereto in reliance upon, and in conformity with,  information furnished in
     writing to the Company by the Investor  specifically for use therein.  This
     indemnity  will be in  addition  to any  liability  which the  Company  may
     otherwise have.

          (b) The Investor  agrees to indemnify  and hold  harmless the Company,
     each other  person  referred to in subparts  (1), (2) and (3) of Section 11
     (a) of the Securities Act in respect of such  Registration  Statement,  and
     each person, if any, who controls the Company or any such person within the
     meaning of Section 15 of the  Securities  Act,  against any and all losses,
     claims,  damages  or  liabilities  (including  the costs of any  reasonable
     investigation and legal and other expenses incurred in connection with, and
     any amount paid in  settlement  of, any action,  suit or  proceeding or any
     claim asserted) to which they, or any of them, may become subject under the
     Securities Act, the Exchange Act or other federal,  provincial or state law
     or regulation, at common law, or otherwise, insofar as such losses, claims,
     damages or liabilities (or actions in respect  thereof) arise out of or are
     based upon any untrue  statement or alleged untrue  statement of a material
     fact contained in such Registration  Statement,  or any related preliminary
     prospectus, final prospectus or amendment thereof or supplement thereto, or
     arise out of or are based upon any  omission  or alleged  omission to state
     therein a material fact required to be stated  therein or necessary to make
     the statements therein, in light of the circumstances under which they were
     made, not misleading,  in each case to the extent,  but only to the extent,
     that  such  untrue  statement  or  omission  was made in such  Registration
     Statement, preliminary prospectus, final prospectus or amendment thereof or
     supplement  thereto in reliance upon, and in conformity  with,  information
     furnished  in writing to the Company by the Investor  specifically  for use
     therein; provided,  however, that the obligations of the Investor hereunder
     shall be limited to an amount equal to the net proceeds to it from sales of
     securities sold as contemplated  herein;  and provided  further,  that this
     indemnity, as to any preliminary prospectus, shall not inure to the benefit
     of the Investor (or any person  controlling the Investor) on account of any
     loss,  claim,  damage,  liability  or  litigation  arising from the sale of
     Registerable  Shares to any person by the  Investor if it failed to send or
     give a copy of any subsequent  prospectus or prospectus  supplement to such
     person  within the time  required  by the  Securities  Act,  and the untrue
     statement or alleged untrue  statement or omission or alleged omission of a
     material  fact  in  such  preliminary   prospectus  was  corrected  in  the
     subsequent prospectus or prospectus supplement. This


                                      -34-

<PAGE>


     indemnity agreement will be in addition to any liability which the Investor
     may otherwise have.

          (c) Any party  that  proposes  to assert  the right to be  indemnified
     under  this  Section  9 shall,  promptly  after  receipt  of  notice of the
     commencement  of any  action,  suit or  proceeding  against  such  party in
     respect  of which a claim is to be made  against an  indemnifying  party or
     parties  under this Section 9, notify each such  indemnifying  party of the
     commencement   thereof,   enclosing  a  copy  of  all  papers  served.   No
     indemnification  provided for in Section 9(a) or 9(b) shall be available to
     any party who shall fail to give notice as provided in this  Section  9(c),
     provided  that the  failure  of any  indemnified  party to give  notice  as
     provided herein shall not relieve the indemnifying party of its obligations
     under  this  Section 9 unless  the  indemnifying  party was  unaware of the
     proceeding  to which such  notice  would have  related  and was  materially
     prejudiced  by the  failure  to give  such  notice  and  provided  that the
     omission so to notify such indemnifying  party of any such action,  suit or
     proceeding  shall not relieve it from any liability that it may have to any
     indemnified  party other than under this Section 9 or Section 10 below.  In
     case any such action, suit or proceeding is brought against any indemnified
     party and it notifies the indemnifying  party of the commencement  thereof,
     such  indemnifying  party will be entitled to  participate  in, and, to the
     extent  that  it may  wish,  jointly  with  any  other  indemnifying  party
     similarly  notified,  to assume the defense thereof with counsel reasonably
     satisfactory  to  such  indemnified  party,  and,  after  notice  from  the
     indemnifying  party to such indemnified  party of its election so to assume
     the defense  thereof  and the  approval  by the  indemnified  party of such
     counsel (which shall not be unreasonably withheld),  the indemnifying party
     shall  not be  liable  to such  indemnified  party  for any  legal or other
     expenses,  except as provided below and except for the reasonable  costs of
     investigation subsequently incurred by such indemnified party in connection
     with the defense  thereof.  The  indemnified  party shall have the right to
     employ its counsel in any such action,  suit or proceeding but the fees and
     expenses of such counsel shall be at the expense of such indemnified  party
     unless (i) the  employment  of counsel by such  indemnified  party has been
     authorized in writing by the  indemnifying  parties,  (ii) the  indemnified
     party  shall  have  reasonably  concluded  that there may be  differing  or
     additional  defenses  available  to it  and  not  to  one  or  more  of the
     indemnifying parties in such action, suit or proceeding so that it would be
     inappropriate  for counsel to represent both the indemnified  party and the
     indemnifying party in view of actual or potential conflicts of interest (in
     which case if such  indemnified  party notifies the  indemnifying  party in
     writing  that it elects to employ  separate  counsel at the  expense of the
     indemnifying  party,  the  indemnifying  party  shall not have the right to
     assume


                                      -35-

<PAGE>


     the  defense  of  such  action,  suit  or  proceeding  on  behalf  of  such
     indemnified  party);  or (iii)  the  indemnifying  parties  shall  not have
     employed  counsel to assume the defense of such action  within a reasonable
     time after notice of the commencement  thereof,  in each of which cases the
     fees  and  expenses  of the  indemnified  party's  counsel  shall be at the
     expense of the indemnifying parties, it being understood, however, that the
     indemnifying party shall not, in connection with any one such action,  suit
     or proceeding  or separate but  substantially  similar or related  actions,
     suits or  proceedings  in the  same  jurisdiction  arising  out of the same
     general allegations or circumstances, be liable for the reasonable fees and
     expenses of more than one separate  firm of attorneys  for the Investor and
     its controlling  persons. An indemnifying party shall not be liable for any
     settlement of any action,  suit,  proceeding or claim effected  without its
     written consent.

     10. Contribution.  In order to provide for just and equitable  contribution
in circumstances in which the  indemnification  provided for in Section 9 is due
in  accordance  with its terms but for any reason is held to be  unavailable  or
insufficient to hold harmless an indemnified  party, the Company on the one hand
and  the  Investor  on the  other  hand  shall,  in lieu  of  indemnifying  such
indemnified  party,  contribute  to the  aggregate  losses,  claims,  damages or
liabilities  referred to in Section 9 (including costs of any  investigation and
legal and other expenses  reasonably incurred in connection  therewith,  and any
amount paid in  settlement  of, any  action,  suit or  proceeding  or any claims
asserted),  in such  proportions as is appropriate to reflect the relative fault
of the Company and the Investor in connection  with the  statements or omissions
which resulted in such losses, claims, damages, liabilities or expenses, as well
as any  other  relevant  equitable  considerations.  The  relative  fault of the
Company and the  Investor  shall be  determined  by  reference  to,  among other
things,  whether the untrue or alleged  untrue  statement of a material  fact or
omission  related to  information  supplied by the Company  (including  for this
purpose information supplied by any officer, director,  employee or agent of the
Company) or to written  information  furnished to the Company by or on behalf of
the  Investor  specifically  for  use in  the  preparation  of the  Registration
Statement  or any  amendment  thereof or  supplement  thereto,  and the parties'
relative intent, knowledge,  access to information and opportunity to correct or
prevent such  statement  or omission.  Notwithstanding  the  provisions  of this
Section 10 in no case shall the Investor be liable or responsible for any amount
in  excess  of the  proceeds  received  by the  Investor  from  the  sale of the
Registerable Shares included in the Registration Statement,  provided,  however,
that no person  guilty of  fraudulent  misrepresentation  (within the meaning of
Section 11 (f) of the Securities Act) shall be entitled to contribution from any
person who was not guilty of such fraudulent misrepresentation.  For purposes of
this  Section 10, each person,  if any,  who  controls  the Investor  within the
meaning of Section


                                      -36-

<PAGE>


15 of the  Securities  Act or Section  20(a) of the  Exchange Act shall have the
same rights to  contribution  as the  Investor,  and each  person,  if any,  who
controls the Company  within the meaning of the Section 15 of the Securities Act
or Section  20(a) of the  Exchange  Act,  each  director of the Company and each
officer of the Company who shall have signed the  Registration  Statement  shall
have the same rights to contribution as the Company,  subject to the immediately
preceding  sentence of this Section 10. Any party entitled to contribution will,
promptly  after  receipt  of  notice  of  commencement  of any  action,  suit or
proceeding  against such party in respect of which a claim for  contribution may
be made against  another  party or parties  under this  Section 10,  notify such
party or parties from whom  contribution  may be sought,  and the omission so to
notify such party or parties from whom  contribution may be sought shall relieve
the party or  parties  from whom  contribution  may be sought (if such party was
unaware of such action,  suit, or proceeding  and was  materially  prejudiced by
such omission) from any liability  under this Section 10, but not from any other
obligation it or they may have hereunder or other than under this Section 10. No
party shall be liable for  contribution  with respect to the  settlement  of any
action,  suit,  proceeding or claim effected  without its written  consent.  The
obligations  of the  Investor  to  contribute  pursuant  to this  Section 10 are
several in proportion to its respective  number of Registerable  Shares included
in the Registration Statement and not joint.  Notwithstanding the foregoing,  to
the extent that the provisions on indemnification and contribution  contained in
the  underwriting  agreement  entered into in connection  with any  underwritten
public  offering  contemplated  by  this  Agreement  are in  conflict  with  the
foregoing  provisions,  the provisions in such  underwriting  agreement shall be
controlling.

     11.  Notices.  Any  notice  hereunder  shall  be in  writing  and  shall be
effective  when  delivered  in person  or by  facsimile  transmission,  or seven
business  days after being  mailed by  certified  or  registered  mail,  postage
prepaid,  return receipt  requested,  to the appropriate  party at the following
addresses:

If to the Investor:

                  Warburg, Pincus Ventures, L.P.
                  466 Lexington Avenue
                  New York, New York 10017-3147
                  Facsimile:  212-878-9351
                  Attention:  Mr. Joel Ackerman

with a copy to:

                  Willkie Farr & Gallagher
                  787 Seventh Avenue
                  New York, New York 10019-6099
                  Facsimile:  212-728-8111
                  Attention:  Steven J. Gartner, Esq.


                                      -37-

<PAGE>


If to the Company:

                  Sonus Corp.
                  111 SW Fifth Avenue, Suite 1620
                  Portland, Oregon 97204
                  Facsimile:  503-225-9309
                  Attention:  Mr. Brandon M. Dawson

with a copy to:

                  Sonus Corp.
                  111 SW Fifth Avenue, Suite 1620
                  Portland, Oregon 97204
                  Facsimile:  503-225-9309
                  Attention:  Brian S. Thompson, Esq.

     12.  Parties.  This  Agreement  will inure to the benefit of and be binding
upon the Investor, the Company and their respective successors and assigns. This
Agreement  is intended to be, and is for the sole and  exclusive  benefit of the
parties hereto and the other indemnified  parties described in Sections 9 and 10
hereof and their  respective  successors and assigns,  and for the benefit of no
other person, and no other person will have any legal or equitable right, remedy
or claim under, or in respect of this  Agreement.  Except as provided in Section
4(b) and Section 8(m) hereof,  no  purchaser  of any of the  Securities  will be
construed as a successor  or assign of the Investor  entitled to any benefits of
this Agreement, merely by reason of such purchase.

     13. Termination and Survival. Unless the Closing has occurred prior thereto
or simultaneously  herewith,  this Agreement and, except as herein provided, all
the rights of the parties  hereto,  shall terminate on November 30, 1999 (unless
such date is extended by mutual written consent). Notwithstanding the foregoing,
Section  7  hereof  shall  survive  the  termination  of  this  Agreement.   All
warranties,  representations, and covenants made by the Investor and the Company
herein or in any  certificate or other  instrument  delivered by the Investor or
the Company under this Agreement shall be considered to have been relied upon by
the  Company  or the  Investor,  as the  case  may be,  and  shall  survive  all
deliveries to the Investor of the Securities, or payment to the Company for such
Securities, regardless of any investigation made by the Company or the Investor,
as the case may be, or on the Company's or the Investor's behalf. All statements
in any such  certificate or other  instrument  shall  constitute  warranties and
representations by the Company or the Investor, as the case may be, hereunder.

     14.  Amendment and  Modification.  Neither this Agreement,  nor any term or
provision  hereof,  may be changed,  waived,  discharged,  amended,  modified or
terminated in any manner other than by an  instrument in writing  signed by each
of the parties hereto.


                                      -38-

<PAGE>


     15. Further  Assurances.  Each party to this Agreement will perform any and
all acts and execute any and all  documents as may be necessary and proper under
the  circumstances  in order to  accomplish  the  intent  and  purposes  of this
Agreement  and to carry  out its  provisions.  Each  such  party  shall  use its
reasonable  efforts  to  fulfill or obtain  the  fulfillment  of the  respective
conditions to the Closing as promptly as practicable.

     16. Waiver of Breach. The failure of any party hereto to insist upon strict
performance  of any of the  covenants and  agreements  herein  contained,  or to
exercise any option or right herein conferred in any one or more instances, will
not be construed to be a waiver or  relinquishment  of any such option or right,
or of any other covenants or agreements, and the same will be and remain in full
force and effect.

     17. Entire  Agreement.  This  Agreement  contains the entire  agreement and
understanding  of the parties with respect to the entire  subject matter hereof,
and there are no representations,  inducements,  promises or agreements, oral or
otherwise,  not embodied herein.  Any and all prior  discussions,  negotiations,
commitments and  understandings  relating thereto,  whether written or oral, are
superseded  hereby.  There are no conditions  precedent to the  effectiveness of
this Agreement other than as stated herein,  and there are no related collateral
agreements existing between the parties that are not referred to herein.

     18.  Severability.  In the event  that any part or parts of this  Agreement
shall be held illegal or  unenforceable by any court or  administrative  body of
competent  jurisdiction,  such  determination  shall not  affect  the  remaining
provisions of this Agreement which shall remain in full force and effect.

     19. Limitation on Enforcement of Remedies.  Without in any way limiting its
rights  against the Investor or its general  partner,  the Company hereby agrees
that it will not assert  against the limited  partners of the Investor any claim
it may have under this Agreement by reason of any failure or alleged  failure by
the Investor to meet its obligations hereunder.

     20.  Counterparts.  This Agreement may be executed in counterparts and each
of such counterparts will for all purposes be deemed to be an original, and such
counterparts will together constitute one and the same instrument.

     21. Law. This  Agreement  will be deemed to have been made and delivered in
New York City and will be governed as to validity, interpretation, construction,
effect and in all other  respects by the internal laws of the State of New York.
The Company (a) agrees that any legal suit, action or proceeding  arising out of
or relating to this  Agreement  may be  instituted  in the Supreme  Court of the
State of New York,  County of New York, or in the United States  District  Court
for the  Southern  District  of New York,  (b)  waives any  objection  which the
Company may have


                                      -39-

<PAGE>


now or hereafter to the venue of any such suit,  action or  proceeding,  and (c)
irrevocably  consents to the  jurisdiction  of the Supreme Court of the State of
New York,  County of New York,  and the  United  States  District  Court for the
Southern  District  of New York in any such  suit,  action  or  proceeding.  The
Company further agrees to accept and acknowledge  service of any and all process
which may be served in any such suit,  action or  proceeding  in such courts and
agrees that service of process upon the Company  mailed by certified mail to the
Company's  address will be deemed in every respect  effective service of process
upon the Company, in any such suit, action or proceeding.

                     [This space intentionally left blank.]


                                      -40-

<PAGE>


     IN WITNESS  WHEREOF,  the  Company and the  Investor  have each caused this
Agreement  to be executed by its duly  authorized  officer,  each as of the date
first above written.


                                        SONUS CORP.



                                        By:  /s/ Brandon M. Dawson
                                            ------------------------------
                                            Name:  Brandon M. Dawson
                                            Title: Chairman and
                                                   Chief Executive Officer



                                        WARBURG, PINCUS VENTURES, L.P.
                                        By: Warburg, Pincus & Co.,
                                            General Partner


                                        By:  /s/ Joel Ackerman
                                            ------------------------------
                                            Name:  Joel Ackerman
                                            Title: Partner



<PAGE>


                                                                       EXHIBIT A








                                   SONUS CORP.


- --------------------------------------------------------------------------------

                              AMENDED AND RESTATED
                                WARRANT AGREEMENT

- --------------------------------------------------------------------------------

                  Warrants to Purchase 2,000,000 Common Shares

- --------------------------------------------------------------------------------


     THIS AMENDED AND RESTATED WARRANT AGREEMENT (this  "Agreement") dated as of
October  1,  1999  is made  and  entered  into by and  between  Sonus  Corp.,  a
corporation  continued and existing  under the laws of Yukon  Territory,  Canada
(the  "Company"),  and  Warburg,  Pincus  Ventures,  L.P.,  a  Delaware  limited
partnership (the "Warrantholder").

     Subject  to the terms  and  conditions  hereof,  pursuant  to a  Securities
Purchase  Agreement  dated as of October 1, 1999, by and between the Company and
the Warrantholder (the "Securities Purchase  Agreement"),  the Company agrees to
(a) amend and  restate,  as  hereinafter  described,  the terms of the  warrants
described in and issued pursuant to that certain  Warrant  Agreement dated as of
December  24,  1997,  by and  between  the  Company  and the  Warrantholder,  as
represented  by Warrant  Certificate  No. W-1 of the Company dated  December 24,
1997 (the "Old Warrant  Certificate");  (b) cancel the Old Warrant  Certificate;
and (c) issue to the Warrantholder, Amended and Restated Warrant Certificate No.
W-1 of the  Company,  the  form of  which  is  attached  hereto  as  Exhibit  1,
representing  warrants  (the  "Warrants")  to  purchase  up to an  aggregate  of
2,000,000 common shares without par value of the Company (the "Common  Shares"),
at the Warrant Price (as hereinafter defined), subject to adjustment pursuant to
Section 6 hereof.  As used herein (i) the term "Shares"  shall mean,  unless the
context  otherwise  requires,  collectively  the  Common  Shares  issuable  upon
exercise of the Warrants  together with any other  securities or other  property
issuable upon such exercise as provided in Section 6 of this Agreement; (ii) the
term "Warrants" shall include any and all warrants  outstanding pursuant to this
Agreement,  including those  evidenced by a certificate or  certificates  issued
upon division, exchange or substitution pursuant to this Agreement; (iii) the


                                       -1-

<PAGE>


term "Warrant Price" shall mean the price per Share at which Shares shall at any
time be  purchasable  upon  exercise of the  Warrants,  such price to equal U.S.
$6.75, subject to adjustment pursuant to Section 6 hereof,  provided that if the
Series A Amendment  Filing Date has not  occurred on or prior to March 31, 2000,
then from and after March 31, 2000, such price shall equal U.S.  $4.00,  subject
to  adjustment  pursuant  to  Section  6  hereof;  and (iv) the term  "Series  A
Amendment  Filing  Date"  shall  mean the date  upon  which  the  amendment  and
restatement  of the  terms  of the  Series  A  Convertible  Shares,  in the form
attached to the Securities Purchase Agreement as Exhibit B, shall have occurred,
as  preceded  by the  passing  of  resolutions  by a  majority  of not less than
two-thirds of the votes cast by the holders of the Common  Shares,  the Series A
Convertible Shares and Series B Convertible  Shares of the Company,  each voting
separately  as a  class,  as  evidenced  by (1) a  duly  executed  report  of an
inspector  of election,  (2) a copy of the  articles of  amendment  amending the
terms  of the  Series  A  Convertible  Shares,  certified  by the  registrar  of
Corporations  of the  Yukon  Territory  and (3) an  opinion  of  counsel  to the
Company,  addressed to the Investor,  in the form attached  hereto as Exhibit 4,
and such other  documentation as the Investor may reasonably  request;  provided
that no Series A Amendment  Filing Date shall occur after March 31, 2000.  Terms
which are  capitalized but not defined herein shall have the same meanings as in
the Securities Purchase  Agreement.  Any amounts herein referencing share prices
or numbers of shares shall be subject to appropriate adjustments in the event of
any stock splits, consolidations or the like.

     For the purpose of defining  the terms and  provisions  of the Warrants and
the  respective  rights  and  obligations   thereunder,   the  Company  and  the
Warrantholder, for value received, hereby agree as follows:

     Section 1. Restrictions on Transfer and Form of Warrants.

     1.1. Registration.  Certificates  evidencing the Warrants shall be numbered
and shall be registered  on the books of the Company when issued,  in accordance
with Yukon Territory corporate practice.

     1.2.  Restriction  on Transfer of the Warrants.  The Warrants  shall not be
transferable  and  may  not  be  sold,   assigned,   hypothecated  or  otherwise
transferred  by the  Warrantholder  without the express  written  consent of the
Company, such consent not to be unreasonably  withheld. Any transferee permitted
under this Section 1.2 shall acquire title to such  transferred  Warrants and to
all rights represented thereby.

     1.3.  Form of Warrants.  The form of  certificate  evidencing  the Warrants
shall be substantially as set forth in Exhibit 1 hereto. Certificates evidencing
the Warrants  shall be executed on behalf of the Company by its  President or by
any Vice President, shall be attested to by its Secretary or any Assistant


                                       -2-

<PAGE>


Secretary, and shall be dated as of the date of execution thereof.

     1.4.  Legends on Warrants and Common Shares.  The Warrants,  and the Shares
issuable  upon  the  exercise  thereof,  have  not  been  registered  under  the
Securities Act of 1933, as amended (the "Securities  Act"). Each certificate for
the Warrants shall bear the following legend:

          "THE WARRANTS  REPRESENTED BY THIS CERTIFICATE,  AND THE COMMON SHARES
          ISSUABLE  UPON  EXERCISE OF SUCH  WARRANTS,  HAVE NOT BEEN  REGISTERED
          UNDER THE UNITED STATES  SECURITIES ACT OF 1933 OR THE SECURITIES LAWS
          OF ANY STATE OF THE UNITED  STATES OR ANY  PROVINCE  OF  CANADA.  SUCH
          WARRANTS  MAY NOT BE SOLD,  OFFERED  FOR  SALE,  ASSIGNED,  EXCHANGED,
          PLEDGED OR HYPOTHECATED OR OTHERWISE  TRANSFERRED,  IN ANY MANNER, AND
          SUCH  COMMON  SHARES MAY NOT BE  OFFERED  FOR SALE,  SOLD,  PLEDGED OR
          HYPOTHECATED OR TRANSFERRED IN THE ABSENCE OF SUCH  REGISTRATION OR AN
          OPINION OF COUNSEL,  REASONABLY  SATISFACTORY TO THE COMPANY,  THAT AN
          EXEMPTION   FROM  SUCH   REGISTRATION   IS  AVAILABLE.   THE  WARRANTS
          REPRESENTED BY THIS  CERTIFICATE MAY NOT BE TRADED IN CANADA EXCEPT AS
          PERMITTED BY RELEVANT CANADIAN SECURITIES LAWS."

Each certificate for the Shares shall bear the following legend:

          "THE  COMMON  SHARES  REPRESENTED  BY THIS  CERTIFICATE  HAVE NOT BEEN
          REGISTERED  UNDER  THE  UNITED  STATES  SECURITIES  ACT OF 1933 OR THE
          SECURITIES  LAWS OF ANY STATE OF THE UNITED  STATES OR ANY PROVINCE OF
          CANADA  AND  MAY  NOT  BE  SOLD,  ASSIGNED,   EXCHANGED  OR  OTHERWISE
          TRANSFERRED,  IN THE  ABSENCE  OF SUCH  REGISTRATION  OR AN OPINION OF
          COUNSEL,  REASONABLY  SATISFACTORY  TO THE COMPANY,  THAT AN EXEMPTION
          FROM  SUCH   REGISTRATION  IS  AVAILABLE  THIS   CERTIFICATE  MAY  NOT
          CONSTITUTE  'GOOD DELIVERY' IN SATISFACTION OF A TRADE MADE ON A STOCK
          EXCHANGE IN CANADA.  THIS  CERTIFICATE IS NOT  TRANSFERABLE  IN CANADA
          UNTIL  MARCH  30,  2000  EXCEPT  PURSUANT  TO AN  EXEMPTION  FROM  THE
          PROSPECTUS   REQUIREMENTS   CONTAINED  IN  THE  APPLICABLE  SECURITIES
          LEGISLATION."

     Any  certificate  issued at any time in  exchange or  substitution  for any
certificate bearing such legend (except a new certificate issued upon completion
of  a  public  distribution  pursuant  to a  registration  statement  under  the
Securities Act of


                                       -3-

<PAGE>


the Common Shares represented  thereby) shall also bear a like legend unless, in
the opinion of counsel  reasonably  satisfactory to the Company,  the securities
represented thereby need no longer be subject to such restrictions.

     Section 2. Term of Warrants; Exercise of Warrants.

     (a) Subject to the terms of this Agreement,  the  Warrantholder  shall have
the right,  at any time and from time to time  during the period  commencing  at
9:00 a.m.,  Pacific  Time,  on October 1, 1999,  (the  "Commencement  Date") and
ending at 5:00 p.m.,  Pacific Time, on October 1, 2004 (the "Termination  Date")
to purchase  from the  Company up to the number of fully paid and  nonassessable
Shares which the  Warrantholder may at the time be entitled to purchase pursuant
to this Agreement,  upon surrender to the Company at its principal office of the
certificates evidencing the Warrants to be exercised, with the purchase form, in
the form  attached  hereto as Exhibit 2, duly  completed  and  signed,  and upon
payment  to the  Company  of an amount  (the  "Exercise  Payment")  equal to the
Warrant  Price  multiplied by the number of Shares being  purchased  pursuant to
such exercise,  payable in cash, by certified or official bank check, or by wire
transfer.

     (b) At any time  subsequent to the first  anniversary  of the  Commencement
Date, in lieu of exercising the Warrants as provided in Section 2(a) above,  and
subject  to  all  applicable  law  and  all  applicable   regulatory  approvals,
limitations and restrictions,  the  Warrantholder may elect to receive,  without
any cash payment, a number of Shares equal to the value (as determined below) of
any or all of the Warrants held of record by the  Warrantholder,  upon surrender
to the  Company at its  principal  office of the  certificates  evidencing  such
Warrants,  with the attached cashless exercise form attached hereto as Exhibit 3
duly  completed  and  signed,  in which  event the  Company  shall  issue to the
Warrantholder a number of Shares computed using the following formula:

          X  =  Y(A-B)
                ------
                  A

where

          X     = the  number of Common  Shares  to be issued  pursuant  to this
                Section 2(b).

          Y     = the number of Common  Shares  issuable  upon  exercise  of the
                surrendered Warrants.

          A     = the average of the Market  Prices of the Common Shares for the
                sixty (60)  calendar  days  immediately  preceding the date upon
                which the certificates  evidencing the surrendered  Warrants are
                received by the Company at its principal office.


                                       -4-


<PAGE>


          B = the Warrant Price on such date.

     For all  purposes  of this  Agreement  the term  "Market  Price"  as of any
specified  date shall mean:  (i) if the Common Shares are listed or admitted for
trading on one or more United States national  securities  exchanges,  the daily
closing  price for the Common  Shares on the  principal  exchange  in the United
States on which the Common Shares are listed;  (ii) if the Common Shares are not
listed  or  admitted  for  trading  on any  United  States  national  securities
exchange,  the daily closing price for the Common Shares on the Nasdaq  National
or Nasdaq Small-Cap Market ("Nasdaq"); (iii) if the Common Shares are not listed
or admitted for trading on a United States  national  securities  exchange or on
Nasdaq,  the daily closing  price of the Common  Shares on the  principal  stock
exchange in Canada on which the Common  Shares are listed  (expressed  in United
States  dollars  based  upon the noon  buying  rate in New York  City for  cable
transfers in Canadian  dollars as certified for customs  purposes by the Federal
Reserve Bank of New York);  (iv) if the Common Shares are not listed or admitted
to  trading  on any United  States  national  or  Canadian  national  securities
exchange or on Nasdaq,  the average of the  reported bid and asked prices on the
trading day preceding such date in the  over-the-counter  market as furnished by
the National Quotation Bureau, Inc., or, if such firm is not then engaged in the
business of reporting  such  prices,  as furnished by any member of the National
Association of Securities  Dealers,  Inc. selected by the Company; or (y) if the
Common  Shares are not publicly  traded,  the Market Price for such day shall be
the  fair  market  value  thereof  determined  jointly  by the  Company  and the
Warrantholder;  provided,  however,  that if such  parties  are  unable to reach
agreement  within  a  reasonable  period  of time,  the  Market  Price  shall be
determined  in good faith by an  independent  investment  banking firm  selected
jointly by the Company and the  Warrantholder  or, if that  selection  cannot be
made within an  additional 15 days, by an  independent  investment  banking firm
selected by the American Arbitration Association in accordance with its rules.

     (c) The  Company  may,  at any  time,  elect to force the  exercise  of the
Warrants by the  Warrantholder  subject to the terms of this Agreement  provided
that the Company shall have satisfied all of the following  conditions  prior to
the date of such election by the Company:

          (i) the Common Shares are listed on the New York Stock Exchange, the
     American Stock Exchange or the Nasdaq National Market;

          (ii) the Common Shares are traded on the New York Stock Exchange,  the
     American  Stock  Exchange or the Nasdaq  National  Market at a Market Price
     greater than U.S.


                                       -5-

<PAGE>


     $8.00 per share for the 10 consecutive trading days immediately preceding
     the date of such election; and

          (iii) The Company's net income  (excluding  profit or loss on disposal
     of a significant  part of the Company's assets or separate segment thereof,
     gains on restructuring  payables,  gains or losses on the extinguishment of
     debt,  expropriations  of  property,  gains or losses  that are the  direct
     result of a major casualty,  or one-time losses resulting from prohibitions
     under a newly-enacted law or regulation) for the three  consecutive  fiscal
     quarters ended immediately prior to the date of such election,  as reported
     in or  derived  from  its  quarterly  or  annual  reports  filed  with  the
     Securities and Exchange Commission,  before income taxes,  dividends on the
     Company's  Series A Convertible  Preferred  Shares and Series B Convertible
     Preferred Shares (collectively,  the "Convertible Shares") and amortization
     of goodwill and covenants not to compete for such quarterly periods,  shall
     have averaged at least U.S. $0.35 per fully diluted Common Share per fiscal
     quarter,  provided,  however,  that in making such calculation,  the Common
     Shares  issuable upon exercise of the Warrants shall be excluded but Common
     Shares issuable upon the conversion of the Convertible Shares shall not.

The foregoing  conditions (i), (ii) and (iii) shall  hereinafter be collectively
referred to as the "Triggering  Conditions." All references to per share amounts
or prices  with  respect to the  Triggering  Conditions  shall be  appropriately
adjusted for any stock splits, consolidations or the like.

     The Company shall give the Warrantholder written notice that the Triggering
Conditions  have  been  satisfied  and that the  Company  intends  to force  the
exercise of the Warrants.  In this event, the Termination Date shall be the date
ten (10) business days after such notice shall be  effectively  delivered to the
Warrantholder as provided in Section 10 of this Agreement.

     In the event of a forced  exercise  of Warrants  pursuant  to this  Section
2(c), in lieu of exercising the Warrants as provided in Section 2(a) above,  and
subject  to  all  applicable  law  and  all  applicable   regulatory  approvals,
limitations and restrictions,  the  Warrantholder may elect to receive,  without
any cash payment, a number of Shares equal to the value (as determined below) of
any or all of the Warrants held of record by the  Warrantholder,  upon surrender
to the  Company at its  principal  office of the  certificates  evidencing  such
Warrants,  with the attached  cashless  exercise form thereof duly completed and
signed,  in which event the Company shall issue to the holder a number of Shares
computed using the formula set forth in Section 2(b) except the term "A" in such
formula, the Market Price of the Common Shares, shall be calculated based on the
ten (10) trading days  immediately  preceding the date on which the certificates
evidencing the


                                       -6-

<PAGE>


surrendered Warrants are received by the Company at its principal offices.

     (d) Upon the surrender of Warrant  certificates and payment of the Exercise
Payment (in cash, except in the event of a cashless  exercise),  the Company, at
its expense, shall issue and cause to be delivered with all reasonable dispatch,
and in any  event  within  ten (10)  days  thereafter,  to the  Warrantholder  a
certificate or  certificates  for the number of full Shares so acquired upon the
exercise of the Warrant,  together with cash in respect of any fractional Shares
otherwise issuable upon such surrender,  determined in accordance with Section 7
hereof.  Such  certificate or certificates  shall be deemed to have been issued,
and the Warrantholder  shall be deemed to have become a holder of record of such
Shares,  as of the date of surrender of the Warrants being exercised and (in the
case of  exercise  pursuant to Section  2(a))  payment of the  Exercise  Payment
notwithstanding   that  the  certificate  or  certificates   representing   such
securities  shall not actually  have been  delivered or that the stock  transfer
books of the Company shall then be closed.  The Warrants shall be exercisable at
the  election of the  Warrantholder  either in full or from time to time in part
and, in the event that a certificate evidencing Warrants is exercised in respect
of fewer  than all of the  Shares  specified  therein  at any time  prior to the
Termination  Date, a new  certificate  evidencing  the remaining  portion of the
Warrants shall be issued by the Company.

     Section 3.  Payment of Taxes.  The Company  will pay all transfer and stamp
taxes and fees, if any,  attributable to the initial issuance of the Warrants or
the issuance of Shares upon exercise of the Warrants.

     Section  4.  Mutilated  or Missing  Warrants.  In case the  certificate  or
certificates  evidencing  any  Warrants  shall be  mutilated,  lost,  stolen  or
destroyed,  the Company  shall,  at the request of the  affected  Warrantholder,
issue and deliver in exchange and substitution for and upon  cancellation of the
mutilated  certificate or  certificates,  or in lieu of and substitution for the
certificate or certificates lost, stolen or destroyed, a new Warrant certificate
or certificates of like tenor and  representing an equivalent right or interest,
but only upon receipt of evidence reasonably  satisfactory to the Company of the
loss, theft, destruction or mutilation of such Warrant and, if requested, at the
cost  and  expense  of  the  Warrantholder  (in  the  case  of  loss,  theft  or
destruction),  an  unsecured  bond of  indemnity  in form and amount  reasonably
satisfactory to the Company.  Such  substitute  Warrant  certificate  shall also
comply with such other reasonable regulations as the Company may prescribe.

     Section 5. Reservation of Common Shares. There has been reserved, and the
Company shall at all times keep reserved and available so long as any Warrants
remain outstanding, out of its authorized share capital, such number of Shares
as shall be


                                       -7-

<PAGE>


subject to purchase under all outstanding Warrants. Every transfer agent for the
Common Shares and other  securities of the Company issuable upon the exercise of
Warrants  will be  irrevocably  authorized  and directed at all times to reserve
such  number  of  authorized  Common  Shares  and other  securities  as shall be
requisite for such  purposes.  The Company will keep a copy of this Agreement on
file with every transfer  agent for the Common  Shares.  The Company will supply
every such transfer  agent with duly executed stock and other  certificates,  as
appropriate,  for such purpose and will provide or otherwise  make available any
cash which may be payable as provided in Section 7 hereof.

     Section 6. Adjustment of Number and Kind of Securities. The number and kind
of  securities  purchasable  upon the  exercise of the  Warrants and the Warrant
Price shall be subject to  adjustment  from time to time upon the  happening  of
certain events, as follows:

     6.1.  Anti-Dilution  Provisions And Other Adjustments.  In order to prevent
dilution of the rights granted hereunder,  the Warrant Price shall be subject to
adjustment  from  time to time in  accordance  with  this  Section  6. Upon each
adjustment  of the Warrant Price  pursuant to this Section 6, the  Warrantholder
shall  thereafter  be entitled to acquire upon  exercise,  at the Warrant  Price
resulting from such adjustment,  the number of Shares  obtainable by multiplying
the Warrant Price in effect  immediately  prior to such adjustment by the number
of Shares  acquirable  immediately  prior to such  adjustment  and  dividing the
product thereof by the Warrant Price resulting from such adjustment.

     (a)  Adjustment  for Issue or Sale of Common Shares at Less than  Specified
Prices.  Except as provided in Sections 6.3 or 6.5 below,  if and whenever on or
after the date hereof the Company  shall issue or sell,  or shall in  accordance
with subparagraphs 6.1(a)(1) to (8), inclusive, be deemed to have issued or sold
(such issuance or sale,  whether actual or deemed,  a "Triggering  Transaction")
any Common Shares for a consideration per share less than

          (I)  (if the  Common  Shares  are not  traded  on the New  York  Stock
     Exchange,  the American Stock Exchange or the Nasdaq National  Market) U.S.
     $6.75 then  forthwith  upon such  issue or sale the  Warrant  Price  shall,
     subject to subparagraphs  (1) to (8) of this Section 6.1(a),  be reduced to
     the Warrant Price (calculated to the nearest tenth of a cent) determined by
     dividing:  (i) an amount  equal to the sum of (x) the  product  derived  by
     multiplying  the Number of Common  Shares  Deemed  Outstanding  immediately
     prior to such  Triggering  Transaction by the Warrant Price then in effect,
     plus  (y)  the  consideration,   if  any,  received  by  the  Company  upon
     consummation of such Triggering Transaction, by (ii) an amount equal to the
     sum of (x) the Number of Common Shares Deemed Outstanding immediately prior
     to such  Triggering  Transaction  plus (y) the  number  of shares of Common
     Stock


                                       -8-

<PAGE>


     issued (or deemed to be issued in accordance with subparagraphs 6.1(a)(1)
     to (8)) in connection with the Triggering Transaction; or

          (II) (if the Common Shares are traded on the New York Stock  Exchange,
     the  American  Stock  Exchange or the Nasdaq  National  Market) the average
     Market Price for the ten trading days  immediately  preceding such issuance
     or sale, then forthwith upon such Triggering Transaction, the Warrant Price
     shall,  subject to  subparagraphs  (1) to (8) of this  Section  6.1(a),  be
     reduced to the Warrant  Price  (calculated  to the nearest tenth of a cent)
     determined by multiplying the Warrant Price in effect  immediately prior to
     the time of such  Triggering  Transaction  by a fraction,  the numerator of
     which  shall  be  the  sum  of (x)  the  Number  of  Common  Shares  Deemed
     Outstanding  immediately  prior to such Triggering  Transaction and (y) the
     number of Common Shares which the aggregate  consideration  received by the
     Company  upon such  Triggering  Transaction  would  purchase at the average
     Market Price for the ten trading days immediately preceding such Triggering
     Transaction,  and the  denominator  of which  shall be the Number of Common
     Shares Deemed Outstanding immediately after such Triggering Transaction.

     For purposes of this Section 6, the term  "Number of Common  Shares  Deemed
Outstanding"  at any given  time  shall mean the sum of (i) the number of Common
Shares  outstanding at such time, and (ii) the number of Common Shares deemed to
be outstanding under subparagraphs 6.1(a)(1) to (8), inclusive, at such time.

     For purposes of determining  the adjusted  Warrant Price under this Section
6.1(a), the following subsections (1) to (8), inclusive, shall be applicable:

          (1) In case the Company at any time shall in any manner grant (whether
     directly or by assumption in an  amalgamation  or otherwise)  any rights to
     subscribe  for or to purchase,  or any options for the purchase of,  Common
     Shares or any stock or other  securities  convertible  into or exchangeable
     for Common Shares (such rights or options being herein called "Options" and
     such  convertible or exchangeable  stock or securities  being herein called
     "Convertible  Securities"),  whether  or not such  Options  or the right to
     convert  or  exchange  any  such  Convertible  Securities  are  immediately
     exercisable,  and the price per share  for  which  the  Common  Shares  are
     issuable upon exercise,  conversion or exchange (determined by dividing (x)
     the  total  amount,  if any,  received  or  receivable  by the  Company  as
     consideration for the granting of such Options,  plus the minimum aggregate
     amount of additional consideration payable to the Company upon the exercise
     of all such  Options,  plus,  in the case of such  Options  which relate to
     Convertible   Securities,   the  minimum  aggregate  amount  of  additional
     consideration, if any, payable upon the issue or sale of such Convertible


                                       -9-

<PAGE>


     Securities  and upon the conversion or exchange  thereof,  by (y) the total
     maximum number of Common Shares  issuable upon the exercise of such Options
     or the conversion or exchange of such Convertible Securities) shall be less
     than  the  average  Market  Price  in  effect  for  the  ten  trading  days
     immediately prior to the time of the granting of such Option (if the Common
     Shares  are  traded on The New York  Stock  Exchange,  The  American  Stock
     Exchange or The National Nasdaq Market) or U.S. $6.75 (if the Common Shares
     are not traded on The New York Stock Exchange, The American Stock Exchange,
     or the Nasdaq  National  Market)  then the total  maximum  amount of Common
     Shares  issuable  upon the  exercise  of such  Options,  or, in the case of
     Options for Convertible Securities, upon the conversion or exchange of such
     Convertible Securities,  shall (as of the date of granting of such Options)
     be deemed to be outstanding and to have been issued and sold by the Company
     for such price per share.  No adjustment of the Warrant Price shall be made
     upon the actual issue of such Common Shares or such Convertible  Securities
     upon  the  exercise  of such  Options,  except  as  otherwise  provided  in
     subparagraph (3) below.

          (2) In case the Company at any time shall in any manner issue (whether
     directly or by  assumption  in an  amalgamation  or  otherwise) or sell any
     Convertible  Securities,  whether or not the rights to  exchange or convert
     thereunder are immediately  exercisable,  and the price per share for which
     Common Shares are issuable upon such conversion or exchange  (determined by
     dividing  (x) the total  amount  received or  receivable  by the Company as
     consideration  for the issue or sale of such Convertible  Securities,  plus
     the minimum aggregate amount of additional  consideration,  if any, payable
     to the Company upon the  conversion or exchange  thereof,  by (y) the total
     maximum number of Common Shares issuable upon the conversion or exchange of
     all such  Convertible  Securities)  shall be less than the  average  Market
     Price in effect for the ten trading days  immediately  prior to the time of
     such issue or sale (if the  Common  Shares are traded on The New York Stock
     Exchange,  The American Stock Exchange,  or The Nasdaq National  Market) or
     U.S.  $6.75 (if the  Common  Shares  are not  traded on The New York  Stock
     Exchange, The American Stock Exchange, or The Nasdaq National Market), then
     the total  maximum  number of Common  Shares  issuable  upon  conversion or
     exchange of all such  Convertible  Securities  shall (as of the date of the
     issue or sale of such  Convertible  Securities) be deemed to be outstanding
     and to have been  issued and sold by the  Company for such price per share.
     No  adjustment  of the Warrant Price shall be made upon the actual issue of
     such Common Shares upon exercise of the rights to exchange or convert under
     such Convertible  Securities,  except as otherwise provided in subparagraph
     (3) below.


                                      -10-

<PAGE>


          (3) If the purchase price  provided for in any Options  referred to in
     subparagraph  (1), the additional  consideration,  if any, payable upon the
     conversion  or  exchange  of  any  Convertible  Securities  referred  to in
     subparagraphs  (1) or (2), or the rate at which any Convertible  Securities
     referred to in subparagraph (1) or (2) are convertible into or exchangeable
     for Common  Shares  shall change at any time (other than under or by reason
     of provisions designed to protect against dilution of the type set forth in
     Section 6.1 (a) or (b)),  the  Warrant  Price in effect at the time of such
     change shall  forthwith be readjusted to the Warrant Price which would have
     been in effect  at such time had such  Options  or  Convertible  Securities
     still  outstanding  provided for such changed  purchase  price,  additional
     consideration or conversion rate, as the case may be, at the time initially
     granted,  issued or sold. If the purchase  price provided for in any Option
     referred  to in  subparagraph  (1) or the  rate at  which  any  Convertible
     Securities  referred to in subparagraphs (1) or (2) are convertible into or
     exchangeable  for Common  Shares,  shall be reduced at any time under or by
     reason of  provisions  with  respect  thereto  designed to protect  against
     dilution,  then in case of the delivery of Common  Shares upon the exercise
     of any such Option or upon  conversion or exchange of any such  Convertible
     Security,  the Warrant Price then in effect  hereunder  shall  forthwith be
     adjusted to such  respective  amount as would have been  obtained  had such
     Option or  Convertible  Security never been issued as to such Common Shares
     and had  adjustments  been  made upon the  issuance  of the  Common  Shares
     delivered  as  aforesaid,  but only if as a result of such  adjustment  the
     Warrant Price then in effect hereunder is hereby reduced.

          (4) On the expiration of any Option or the termination of any right to
     convert or exchange any Convertible  Securities,  the Warrant Price then in
     effect  hereunder  shall  forthwith be increased to the Warrant Price which
     would have been in effect at the time of such expiration or termination had
     such  Option  or  Convertible   Securities,   to  the  extent   outstanding
     immediately prior to such expiration or termination, never been issued.

          (5) In case any Options shall be issued in  connection  with the issue
     or sale  of  other  securities  of the  Company,  together  comprising  one
     integral  transaction  in which no specific  consideration  is allocated to
     such Options by the parties  thereto,  such Options shall be deemed to have
     been issued without consideration.

          (6) In case any Common Shares, Options or Convertible Securities shall
     be  issued or sold or  deemed  to have  been  issued or sold for cash,  the
     consideration  received  therefor shall be deemed to be the amount received
     by the Company therefor. In case any Common Shares, Options or Convertible


                                      -11-

<PAGE>


     Securities shall be issued or sold for a consideration other than cash, the
     amount of the  consideration  other than cash received by the Company shall
     be the fair value of such  consideration as determined in good faith by the
     Board of Directors of the Company.  In case any Common  Shares,  Options or
     Convertible  Securities shall be issued in connection with any amalgamation
     in  which  the  Company  is an  amalgamating  corporation,  the  amount  of
     consideration therefor shall be deemed to be the fair value of such portion
     of the net assets and business of the other corporation which is a party to
     the  amalgamation  as shall be  attributed by the Board of Directors of the
     Company  in good  faith  to such  Common  Shares,  Options  or  Convertible
     Securities, as the case may be.

          (7) In case the  Company  shall  declare a dividend  or make any other
     distribution   upon  the  stock  of  the  Company  payable  in  Options  or
     Convertible  Securities,  then in such  case  any  Options  or  Convertible
     Securities,  as the case may be,  issuable  in payment of such  dividend or
     distribution   shall  be  deemed  to  have  been  issued  or  sold  without
     consideration.

          (8) For purposes of this  Section  6.1(a),  in case the Company  shall
     take a record of the  holders  of its  Common  Shares  for the  purpose  of
     entitling them (x) to receive a dividend or other  distribution  payable in
     Common Shares,  Options or in Convertible  Securities,  or (y) to subscribe
     for or purchase Common Shares, Options or Convertible Securities, then such
     record  date  shall be  deemed  to be the date of the  issue or sale of the
     Common  Shares deemed to have been issued or sold upon the  declaration  of
     such dividend or the making of such other  distribution  or the date of the
     granting of such right or subscription or purchase, as the case may be.

     (b) In case the Company shall (i) pay a dividend in Common Shares or make a
distribution in Common Shares or (ii) subdivide its  outstanding  Common Shares,
the Warrant Price in effect  immediately  prior to such  subdivision or dividend
shall  be  proportionately  reduced  by  the  same  ratio  as  the  dividend  or
subdivision.  In case the  Company  shall at any time  combine  its  outstanding
Common Shares, the Warrant Price in effect immediately prior to such combination
shall be  proportionately  increased by the same ratio as the  combination.  Any
adjustment  made  pursuant to this  subsection  6.1 (b) shall  become  effective
immediately on the effective date of such event  retroactive to the record date,
if any, for such event.

     (c) Whenever the number of Common Shares  purchasable  upon the exercise of
Warrants is adjusted as herein provided,  the Company shall cause to be promptly
delivered to the  Warrantholder  notice of such  adjustment and a certificate of
the chief financial officer of the Company setting forth the number of


                                      -12-

<PAGE>


Common  Shares  purchasable  upon  the  exercise  of  the  Warrants  after  such
adjustment,  the Warrant Price that will be effective after such  adjustment,  a
brief  statement of the facts  requiring such  adjustment and the computation by
which  such  adjustment  was  made.  If such  notice  relates  to an  adjustment
resulting  from an event referred to in Section 8, such notice shall be included
as  part  of the  notice  required  to be  delivered  and  published  under  the
provisions of Section 8 hereof.

     6.2. No Adjustment for Dividends.  Except as provided in this Section 6, no
adjustment to the Warrants or any  provision or condition  thereof in respect of
any dividends or distributions  out of earnings shall be made during the term of
the Warrants or upon the exercise of Warrants.

     6.3. Dividends Not Paid Out of Earnings or Earned Surplus. In the event the
Company  shall  declare a dividend upon the Common Shares (other than a dividend
payable in Common  Shares)  payable  otherwise  than out of  earnings  or earned
surplus, determined in accordance with generally accepted accounting principles,
including the making of appropriate  deductions for minority interests,  if any,
in subsidiaries (herein referred to as "Liquidating  Dividends"),  then, as soon
as possible  after the exercise of this  Warrant,  the Company  shall pay to the
person  exercising  such Warrant an amount equal to the  aggregate  value at the
time of such exercise of all Liquidating Dividends (including but not limited to
the  Common  Shares  which  would have been  issued at the time of such  earlier
exercise and all other  securities  which would have been issued with respect to
such Common Shares by reason of stock splits, stock dividends,  amalgamations or
reorganizations,  or for any other reason).  For the purposes of this subsection
6.3, a dividend  other than in cash shall be considered  payable out of earnings
or earned  surplus only to the extent that such  earnings or earned  surplus are
charged an amount equal to the fair value of such dividend as determined in good
faith by the Board of Directors of the Company.

     6.4. Reclassification,  Amalgamation, etc. If any capital reorganization or
reclassification  of the share capital of the Company,  or  amalgamation  of the
Company with another corporation, or the sale of all or substantially all of its
assets to another  corporation  shall be effected in such a way that  holders of
Common  Shares  shall be entitled to receive  stock,  securities,  cash or other
property with respect to or in exchange for Common Shares,  then, as a condition
of such  reorganization,  reclassification,  amalgamation  or sale,  lawful  and
adequate provision shall be made whereby the Warrantholder  shall have the right
to acquire  and receive  upon  exercise  of this  Warrant  such shares of stock,
securities,  cash  or  other  property  issuable  or  payable  (as  part  of the
reorganization,  reclassification,  amalgamation  or sale) with respect to or in
exchange for such number of outstanding  Shares as would have been received upon
exercise of this Warrant at the Warrant  Price then in effect.  The Company will
not effect any such amalgamation or sale, unless


                                      -13-

<PAGE>


prior to the consummation thereof the amalgamated corporation or the corporation
purchasing such assets shall assume by written instrument mailed or delivered to
the Warrantholder the obligation to deliver to such holder such shares of stock,
securities  or assets as, in  accordance  with the  foregoing  provisions,  such
holder may be entitled to purchase.  If a purchase,  tender or exchange offer is
made to and accepted by the holders of more than 50% of the  outstanding  Common
Shares of the Company,  the Company  shall not effect any  amalgamation  or sale
with the person  having made such offer or with any  Affiliate  of such  person,
unless prior to the consummation of such  amalgamation or sale the Warrantholder
shall have been given a reasonable opportunity to then elect to receive upon the
exercise of this Warrant  either the stock,  securities  or assets then issuable
with  respect to the Common  Shares of the Company or the stock,  securities  or
assets,  or the equivalent,  issued to previous  holders of the Common Shares in
accordance  with such  offer.  For  purposes  hereof the term  "Affiliate"  with
respect to any given person shall mean any person controlling,  controlled by or
under common control with the given person.  In the event of a merger  described
in Section  368(a)(2)(E) of the Internal  Revenue Code of 1986 (or any successor
provision),  in which the  Company is the  surviving  corporation,  the right to
purchase  Shares upon  exercise of the Warrants  shall  terminate on the date of
such merger and thereupon the Warrants  shall become null and void,  but only if
the controlling corporation (after such event) shall agree to substitute for the
Warrants  its  warrants  entitling  the  Warrantholder  to purchase the kind and
amount of shares  and other  securities  and  property  which it would have been
entitled to receive had the Warrants been  exercised  immediately  prior to such
merger. Any such agreements referred to in this subsection 6.3 shall provide for
adjustments,  which shall be as nearly  equivalent as may be  practicable to the
adjustments provided for in this Section 6, and shall contain  substantially the
same terms,  conditions and provisions as are contained herein immediately prior
to such event.  The provisions of this  subsection 6.4 shall  similarly apply to
successive amalgamations, sales or conveyances.

     6.5. No  Adjustment  for Exercise of Certain  Options,  Warrants,  Etc. The
provisions  of this  Section  6 shall  not apply to any  Common  Shares  issued,
issuable or deemed outstanding under  subparagraphs  6.1(a)(1) to (8) inclusive:
(i) to any person  pursuant to any stock option,  stock purchase or similar plan
or  arrangement  for the benefit of employees,  consultants  or directors of the
Company or its subsidiaries in effect on the date hereof or hereafter adopted by
the Board of Directors of the Company, or (ii) pursuant to options, warrants and
conversion  rights in existence on the date hereof,  including  the  Convertible
Shares.

     6.6. Grant Issue or Sale of Options,  Convertible Securities, or Rights. If
at any time or from  time to time on or after  the date of this  Agreement,  the
Company shall grant, issue


                                      -14-

<PAGE>


or sell any Options,  Convertible Securities or rights to purchase property (the
"Purchase  Rights") pro rata to the record holders of any class of share capital
of the  Company  and  such  grants,  issuances  or  sales  do not  result  in an
adjustment  of  the  Warrant  Price  under  Section  6.1(a)  hereof,   then  the
Warrantholder  shall be entitled to acquire  (within  thirty (30) days after the
later to occur of the initial  exercise date of such Purchase  Rights or receipt
by the  Warrantholder  of the  notice  concerning  Purchase  Rights to which the
Warrantholder  shall be entitled under Section 8) and upon the terms  applicable
to such Purchase Rights either:

          (a) the aggregate  Purchase Rights which the Warrantholder  could have
     acquired if it had held the number of Shares  acquirable  upon  exercise of
     this Warrant immediately before the grant issuance or sale of such Purchase
     Rights;  provided  that if any  Purchase  Rights  were  distributed  to the
     Warrantholder   of  Common   Shares   without  the  payment  of  additional
     consideration  by such  holders,  corresponding  Purchase  Rights  shall be
     distributed to the Warrantholder as soon as possible after exercise of this
     Warrant and it shall not be necessary for the Warrantholder specifically to
     request delivery of such rights; or

          (b) in the event that any such  Purchase  Rights shall have expired or
     shall expire prior to the end of said thirty (30) day period, the number of
     Shares  or the  amount  of  property  which the  Warrantholder  could  have
     acquired  upon  such  exercise  at the time or times at which  the  Company
     granted, issued or sold such expired Purchase Rights.

     6.7.  Nominal Value of Common Shares.  Before taking any action which would
cause an  adjustment  effectively  reducing  the  portion of the  Warrant  Price
allocable to each Share below the then  nominal  value per Share  issuable  upon
exercise of the Warrants,  the Company will take any corporate action which may,
in the  opinion of its  counsel,  be  necessary  in order that the  Company  may
validly and legally issue fully paid and  nonassessable  Shares upon exercise of
the Warrants.

     6.8.  Independent  Public  Accountants.  The  Company  may retain a firm of
independent  public  accountants of recognized  national  standing in the United
States  (which may be any such firm  regularly  employed by the Company) to make
any computation required under this Section.

     6.9. Statement on Warrant Certificates.  Irrespective of any adjustments in
the  number  of  securities   issuable   upon  exercise  of  Warrants,   Warrant
certificates  theretofore or thereafter  issued may continue to express the same
number of securities as are stated in the similar Warrant certificates initially
issuable  pursuant to this Agreement.  However,  the Company may, at any time in
its reasonable  discretion,  make any change in the form of Warrant  certificate
that it may deem appropriate and that does not affect the substance thereof; and


                                      -15-

<PAGE>


any Warrant certificate hereafter issued,  whether upon registration of transfer
of, or in exchange or substitution for, an outstanding Warrant certificate,  may
be in the form so changed.

     6.10. Adjustment by Board of Directors. If any event occurs as to which, in
the opinion of the Board of  Directors of the Company,  the  provisions  of this
Section 6 are not strictly applicable or if strictly applicable would not fairly
protect the rights of the  Warrantholder in accordance with the essential intent
and  principles of such  provisions,  then the Board of Directors  shall make an
adjustment  in the  application  of such  provisions,  in  accordance  with such
essential intent and principles,  so as to protect such rights as aforesaid, but
in no event shall any adjustment have the effect of increasing the Warrant Price
as  otherwise  determined  pursuant to any of the  provisions  of this Section 6
except in the case of a combination of shares of a type  contemplated in Section
6.1(a)  and then in no event  to an  amount  larger  than the  Warrant  Price as
adjusted pursuant to Section 6.1(a).

     Section 7.  Fractional  Interests.  The Company shall not issue  fractional
Common  Shares upon any  exercise of any  Warrants.  If any fraction of a Common
Share  would,  except for the  provisions  of this Section 7, be issuable on the
exercise of any  Warrants,  the Company shall pay an amount in cash equal to the
Market Price (as defined in Section 2(b) hereof, except if the Common Shares are
not publicly  traded,  as  determined in good faith by the Board of Directors of
the Company)  multiplied by such  fraction,  provided,  however,  that no amount
shall be paid by the Company of less than U.S. $5.00.

     Section  8. No Rights as  Shareholder,  Notices to  Warrantholder.  Nothing
contained in this  Agreement or in the Warrants shall be construed as conferring
upon the  Warrantholder  any rights as a shareholder  of the Company,  including
(without  limitation) the right to vote, receive  dividends,  consent or receive
notices  as a  shareholder  in respect of any  meeting of  shareholders  for the
election of  directors  of the Company or any other  matter,  except as provided
herein.  If,  however,  at any time prior to the  expiration of the Warrants and
prior to their exercise in full,  any one or more of the following  events shall
occur:

          (a) any action which would require an adjustment pursuant to Section
     6.1 or 6.3; or

          (b) the  Company  shall  declare  any cash  dividend  upon its  Common
     Shares; or

          (c) the Company  shall  declare any  dividend  upon its Common  Shares
     payable in stock or make any special dividend or other  distribution to the
     holders of its Common Shares; or


                                      -16-

<PAGE>


          (d) the  Company  shall  offer  Purchase  Rights to the holders of its
     Common Shares; or

          (e) there shall be any capital  reorganization or  reclassification of
     the share capital of the Company,  including any subdivision or combination
     of its outstanding  Common Shares,  or amalgamation of the Company with, or
     sale of all or substantially all of its assets to, another corporation; or

          (f) there  shall be a  dissolution,  liquidation  or winding up of the
     Company  (other  than in  connection  with an  amalgamation  or sale of its
     property,  assets  and  business  as an  entirety  or  substantially  as an
     entirety);

then  the   Company   shall  give  notice  in  writing  of  such  event  to  the
Warrantholder,  as provided in Section 10 hereof,  at least 20 days prior to (i)
the date fixed as a record  date or the date of closing the  transfer  books for
the  determination  of  the  shareholders  entitled  to any  relevant  dividend,
distribution,  Purchase  Rights  or other  rights  or for the  determination  of
shareholders entitled to vote on such proposed reorganization, reclassification,
amalgamation,  sale,  dissolution,  liquidation  or winding up and (ii) the date
when any such reorganization, reclassification, amalgamation, sale, dissolution,
liquidation or winding up shall take place.  Such notice in accordance  with the
foregoing  clause  (i) shall  also  specify,  in the case of any such  dividend,
distribution or Purchase Rights,  the date on which the holders of Common Shares
shall be entitled  thereto,  and such notice in  accordance  with the  foregoing
clause (ii) shall also  specify  the date on which the holders of Common  Shares
shall be  entitled to  exchange  their  Common  Shares for  securities  or other
property deliverable upon such reorganization,  reclassification,  amalgamation,
sale, dissolution, liquidation or winding up, as the case may be.

     Section 9. No Dilution or Impairment. The Company will not, by amendment of
its charter or through reorganization, amalgamation, dissolution, sale of assets
or any  other  voluntary  action,  avoid  or seek to  avoid  the  observance  or
performance  of any of the terms of this Warrant,  but will at all times in good
faith assist in the carrying out of all such terms and in the taking of all such
action as may be necessary or  appropriate in order to protect the rights of the
Warrantholder  against  dilution  or  other  impairment.  Without  limiting  the
generality of the foregoing,  the Company will not increase the par value of any
shares  receivable  upon the exercise of this Warrant  above the amount  payable
therefor upon such  exercise,  and at all times will take all such action as may
be  necessary or  appropriate  in order that the Company may validly and legally
issue fully paid and non-assessable shares upon the exercise of this Warrant.

     Section 10. Notices. Any notice hereunder shall be in writing and shall be
effective when delivered in person or by


                                      -17-

<PAGE>


facsimile  transmission,  or seven business days after being mailed by certified
or  registered  mail,  postage  prepaid,   return  receipt  requested,   to  the
appropriate party at the following addresses:

If to the Warrantholder:

                  Warburg Pincus Ventures, L.P.
                  466 Lexington Avenue
                  New York, New York 10017-3147
                  Facsimile: 212-878-9351
                  Attention: Mr. Joel Ackerman

with a copy to:

                  Willkie Farr & Gallagher
                  787 Seventh Avenue
                  New York, New York 10019
                  Facsimile: 212-728-8111
                  Attention: Steven J. Gartner, Esq.

If to the Company:

                  Sonus Corp.
                  111 SW Fifth Avenue, Suite 1620
                  Portland, Oregon 97204
                  Facsimile: 503-225-9309
                  Attention: Mr. Brandon M. Dawson

with copy to:

                  Sonus Corp.
                  111 SW Fifth Avenue, Suite 1620
                  Portland, Oregon 97204
                  Facsimile: 503-225-9309
                  Attention:  Brian Thompson, Esq.

or, in each case, to such other address as the parties may hereinafter designate
by like notice.

     Section 11. Successors.  All the covenants and provisions of this Agreement
for the benefit of the  Warrantholder or the Company shall bind and inure to the
benefit of their  successors  and, in the case of the  Warrantholder,  permitted
assigns. This Agreement shall not be assignable by the Company.

     Section 12.  Amalgamation of the Company.  The Company shall not amalgamate
with any other  corporation or sell all or substantially  all of its property to
another corporation, unless the provisions of Section 6.4 are complied with.

     Section 13. Remedies. The Company stipulates that the remedies at law of
the Warrantholder in the event of any default by the Company in the performance
of or compliance with any of


                                      -18-

<PAGE>


the terms of this Warrant are not and will not be adequate, and that the same
may be specifically enforced.

     Section  14.  Subdivisions  of  Rights.  The  Warrants  (as well as any new
warrants  issued  pursuant to the provisions of this Section) are  exchangeable,
upon the surrender  hereof by the  Warrantholder  at the principal office of the
Company for any number of new  warrants of like tenor and date  representing  in
the aggregate the right to subscribe for and purchase the number of Shares which
may be subscribed for and purchased hereunder.

     Section 15.  Applicable  Law,  Submission to  Jurisdiction.  This Agreement
shall be deemed to be a  contract  made  under the laws of the State of New York
and for all purposes shall be construed in accordance  with the internal laws of
said State (without reference to its rules as to conflicts of laws). The Company
hereby agrees to the  non-exclusive  jurisdiction  of the courts of the State of
New York or the  federal  courts  sitting in the City of New York in  connection
with any action arising out of this Agreement.

     Section 16. Benefits of this  Agreement.  Except as provided in Section 1.2
and Section 11,  nothing in this  Agreement  shall be  construed  to give to any
person or corporation  other than the Company and the Warrantholder any legal or
equitable  right,  remedy or claim under this  Agreement.  Except as provided in
Section 1.2 and Section 11, this  Agreement  shall be for the sole and exclusive
benefit of the Company and the Warrantholder.


                                      -19-

<PAGE>


     IN WITNESS  WHEREOF,  the parties  have caused  this  Agreement  to be duly
executed, all as of the date and year first above written.

                                        SONUS CORP.


                                       By:
                                            ------------------------------
                                            Name:
                                            Title:


                                        WARBURG, PINCUS VENTURES, L.P.

                                        By: Warburg, Pincus & Co.,
                                            General Partner


                                       By:
                                            ------------------------------
                                            Name:
                                            Title:


                                      -20-

<PAGE>


                                                                       EXHIBIT 1


                          [FORM OF WARRANT CERTIFICATE]

          "THE WARRANTS  REPRESENTED BY THIS CERTIFICATE,  AND THE COMMON SHARES
          ISSUABLE  UPON  EXERCISE OF SUCH  WARRANTS,  HAVE NOT BEEN  REGISTERED
          UNDER THE UNITED STATES  SECURITIES ACT OF 1933 OR THE SECURITIES LAWS
          OF ANY STATE OF THE UNITED  STATES OR ANY  PROVINCE  OF  CANADA.  SUCH
          WARRANTS  MAY NOT BE SOLD,  OFFERED  FOR  SALE,  ASSIGNED,  EXCHANGED,
          PLEDGED OR HYPOTHECATED OR OTHERWISE  TRANSFERRED,  IN ANY MANNER, AND
          SUCH  COMMON  SHARES MAY NOT BE  OFFERED  FOR SALE,  SOLD,  PLEDGED OR
          HYPOTHECATED OR TRANSFERRED IN THE ABSENCE OF SUCH  REGISTRATION OR AN
          OPINION OF COUNSEL,  REASONABLY  SATISFACTORY TO THE COMPANY,  THAT AN
          EXEMPTION  FROM  SUCH   REGISTRATION   IS  AVAILABLE."   THE  WARRANTS
          REPRESENTED BY THIS  CERTIFICATE MAY NOT BE TRADED IN CANADA EXCEPT AS
          PERMITTED BY RELEVANT CANADIAN SECURITIES LAWS.


                                                            Amended and Restated
                                                     Warrant Certificate No. W-1


                                   SONUS CORP.

                            (ORGANIZED UNDER THE LAWS
                               OF YUKON TERRITORY)

                                                                 October 1, 1999


                       WARRANTS TO PURCHASE COMMON SHARES


     This certifies that, for value received,  Warburg,  Pincus  Ventures,  L.P.
(the  "Warrantholder")  is the  registered  owner  of  2,000,000  warrants  (the
"Warrants") each to purchase from Sonus Corp. (the "Company"), at any time prior
to 5:00 p.m., Pacific Time, on October 1, 2004, one common share of the Company,
without par value (a "Common  Share") at a purchase  price per Common Share (the
"Warrant Price"),  equal to U.S. $6.75,  provided that if the Series A Amendment
Filing Date has not occurred on or prior to March 31, 2000,  then from and after
March 31,  2000,  the Warrant  Price shall equal U.S.  $4.00.  The  Warrants are
subject to, and the Warrantholder,  by acceptance of this certificate,  consents
to, all the terms and provisions of, the Amended and Restated Warrant  Agreement
dated as of October 1, 1999,  between the  Warrantholder  and the  Company  (the
"Warrant Agreement"). Any


                                       -1-

<PAGE>


capitalized  terms used herein and not defined  herein  shall have the  meanings
assigned to such terms in the Warrant Agreement.

     The  Warrants  evidenced  hereby  may be  exercised  in whole or in part by
presentation  of this Warrant  Certificate  with the  Purchase  Form herein duly
executed  (with a signature  guarantee as provided  therein),  and  simultaneous
payment of the Warrant Price for each Warrant exercised, at the principal office
of the  Company.  Payment  of such  price  shall  be made at the  option  of the
Warrantholder  in cash by certified or official bank check or by wire  transfer.
Subject  to the  terms and  conditions  set  forth in  Section 2 of the  Warrant
Agreement,  the  Warrantholder  may also receive  Common Shares without any cash
payment by presentation of this Warrant  Certificate with the Cashless  Exercise
Form herein duly executed  (with a signature  guarantee as provided  therein) at
the principal office of the Company.

     Upon any partial exercise of the Warrants evidenced hereby,  there shall be
signed and issued to the  Warrantholder a new Warrant  Certificate in respect of
the Common Shares as to which the Warrants  evidenced hereby shall not have been
exercised.  These  Warrants  may be  exchanged  at the office of the  Company by
surrender  of this  Warrant  Certificate  properly  endorsed for one or more new
Warrants of the same aggregate  number of Common Shares as here evidenced by the
Warrant or Warrants  exchanged.  No fractional Common Shares will be issued upon
the exercise of rights to purchase hereunder, but the Company shall pay the cash
value  of any  fraction  otherwise  issuable  upon the  exercise  of one or more
Warrants, as provided in the Warrant Agreement.

     The Warrants  evidenced hereby are transferable only in accordance with the
terms and conditions set forth in Section 1.2 of the Warrant Agreement.

     This Warrant  Certificate does not entitle the  Warrantholder to any of the
rights of a shareholder of the Company.


                                       -2-

<PAGE>


                                        SONUS CORP.


                                       By:
                                            ------------------------------
                                            Title:________________________


ATTEST:

- ------------------------------

Title:________________________


Dated: _________, 1999


                                       -3-

<PAGE>


                                                                       EXHIBIT 2


                                  PURCHASE FORM

Sonus Corp.
111 SW Fifth Avenue, Suite 1620
Portland, Oregon 97204

     Pursuant  to  Section  2(a)  of the  Warrant  Agreement,  as  amended,  the
undersigned  hereby  irrevocably  elects  to  exercise  the  right  of  purchase
represented by this Warrant Certificate for, and to purchase thereunder,  ______
common  shares  of  the  Company  (the  "Common  Shares"),   and  requests  that
certificates for such Common Shares be issued in the name of:

Warburg, Pincus Ventures, L.P.
466 Lexington Avenue
New York, New York 10017-3147
Taxpayer Identification Number:  ___________________

If this Warrant Certificate is hereby being exercised with respect to fewer than
all the Common Shares specified herein,  please issue a new Warrant  Certificate
for the  unexercised  balance  of the  Warrants,  registered  in the name of the
undersigned Warrantholder as below indicated and delivered to the address stated
below.

Dated:_______________________

Name of Warrantholder:

Warburg, Pincus Ventures, L.P.
466 Lexington Avenue
New York, New York 10017-3147

     By: Warburg, Pincus & Co.
         General Partner


         By:
             ------------------------------
             Name:
             Title:



<PAGE>


                                                                       EXHIBIT 3

                             CASHLESS EXERCISE FORM

Sonus Corp.
111 SW Fifth Avenue, Suite 1620
Portland, Oregon 97204

     Pursuant to Section 2(b) of the Warrant  Agreement,  the undersigned hereby
irrevocably elects to exercise the right represented by this Warrant Certificate
for, and to receive thereunder, without any cash payment, ________ common shares
of the Company (the "Common Shares") as provided for therein,  and requests that
certificates for such Common Shares be issued in the name of:

Warburg, Pincus Ventures, L.P.
466 Lexington Avenue
New York, New York 10017-3147
Taxpayer Identification Number:  __________________

If this Warrant Certificate is hereby being exercised with respect to fewer than
all the Common Shares specified herein,  please issue a new Warrant  Certificate
for the  unexercised  balance  of the  Warrants,  registered  in the name of the
undersigned Warrantholder as below indicated and delivered to the address stated
below.

Dated:_______________________

Name of Warrantholder:

Warburg, Pincus Ventures, L.P.
466 Lexington Avenue
New York, New York 10017-3147

     By: Warburg, Pincus & Co.
         General Partner


         By:
             ------------------------------
             Print Name:
             Title:



<PAGE>




                                                                       EXHIBIT B





                                   SONUS CORP.

                              AMENDED AND RESTATED

                 TERMS OF SERIES A CONVERTIBLE PREFERRED SHARES
                               (Without Par Value)



     "1. Number and Designation.  The number of shares to constitute this series
shall be  2,666,666  and the  designation  of such shares shall be the "Series A
Convertible Preferred Shares" (hereinafter called "this Series").  The number of
shares  constituting this Series may be decreased from time to time by action of
the Board,  but not below the number of shares of this Series then  outstanding.
All shares of this Series  shall be identical  with each other in all  respects.
The shares of this Series  shall rank senior to the common  shares (the  "Common
Shares")  of the  Corporation  and equal to the Series B  Convertible  Preferred
Shares   ("Series  B  Convertible   Shares")  as  to  cash  dividends  and  upon
liquidation,  as described below. Any amounts herein referencing share prices or
numbers of shares shall be subject to  appropriate  adjustments  in the event of
any stock splits, consolidations or the like.

     "2. Dividend Rights.

     "(a) Subject to the  provisions of this Section 2, the holders of shares of
this Series shall be entitled to receive  when, as and if declared by the Board,
out of assets legally available therefor,  cumulative dividends ("Dividends") at
the applicable  rate per annum specified in Section 2(b) hereof from the date of
issuance and payable in accordance with Section 2(c) hereof.  Dividends shall be
cumulative  from the date of initial  issuance of the shares of this Series (the
"Initial  Issuance Date"),  whether or not earned or declared and whether or not
in any  fiscal  year  there  shall be assets,  net  profits  or surplus  legally
available for the payment of such  Dividends.  In the event that the Board shall
declare a Dividend prior to December 24, 2002, subject to applicable  regulatory
approvals,  such  Dividend may, at the  discretion  of the Board,  be payable in
Common Shares. The number of Common Shares to be issued to the holders of shares
of this  Series upon the  payment of a Dividend  in Common  Shares  shall be the
amount of the



<PAGE>


Dividends  payable to such holder  pursuant to this  Section 2 divided by either
(i) (if the Common  Shares are not  traded on the New York Stock  Exchange,  the
American  Stock Exchange or the Nasdaq  National  Market) U.S. $6.75 or (ii) (if
the Common Shares are traded on the New York Stock Exchange,  the American Stock
Exchange or the Nasdaq  National  Market) the average Market Price of the Common
Shares as such term is defined  below for the ten (10) trading days  immediately
preceding  the  Record  Date as such term is defined  in  Section  2(c)  hereof.
Notwithstanding  the  foregoing,  after December 24, 2002, any and all Dividends
declared must be paid in cash.

     For all purposes hereof, the term "Market Price of the Common Shares" as of
any specified  date shall mean:  (i) if the Common Shares are listed or admitted
for trading on one or more United  States  national  securities  exchanges,  the
daily  closing  price for the Common  Shares on the  principal  exchange  in the
United States on which the Common  Shares are listed;  (ii) if the Common Shares
are not listed or admitted for trading on any United States national  securities
exchange,  the daily closing price for the Common Shares on the Nasdaq  National
or Nasdaq Small-Cap Market ("Nasdaq"); (iii) if the Common Shares are not listed
or admitted for trading on a United States  national  securities  exchange or on
Nasdaq,  the daily closing  price of the Common  Shares on the  principal  stock
exchange in Canada on which the Common  Shares are listed  (expressed  in United
States  dollars  based  upon the noon  buying  rate in New York  City for  cable
transfers in Canadian  dollars as certified for customs  purposes by the Federal
Reserve Bank of New York);  (iv) if the Common Shares are not listed or admitted
to  trading  on any United  States  national  or  Canadian  national  securities
exchange or on Nasdaq,  the average of the  reported bid and asked prices on the
trading day preceding such date in the  over-the-counter  market as furnished by
the National Quotation Bureau, Inc., or, if such firm is not then engaged in the
business of reporting  such  prices,  as furnished by any member of the National
Association of Securities  Dealers,  Inc. selected by the Company; or (v) if the
Common  Shares are not publicly  traded,  the Market Price for such day shall be
the fair market value thereof  determined  jointly by the Company and the holder
of a majority of the shares of this Series then outstanding;  provided, however,
that if such parties are unable to reach agreement within a reasonable period of
time,  the Market  Price shall be  determined  in good faith by the  independent
investment  banking  firm  selected  jointly by the  Company and the holder of a
majority  of the shares of this Series then  outstanding  or, if that  selection
cannot be made  within  an  additional  15 days,  by an  independent  investment
banking firm selected by the American Arbitration Association in accordance with
its rules.


                                       -2-

<PAGE>


     "(b) The Dividend  per share of this Series shall be computed  based upon a
rate per  annum of 5% on a base  amount of U.S.  $6.75 per share of this  Series
(the "Base Amount"). The Dividend rate per annum shall be subject to increase in
the event that all of the following  conditions  (the  "Triggering  Conditions")
have not been satisfied by the dates specified  below: (i) the Common Shares are
listed on the New York Stock Exchange, the American Stock Exchange or the Nasdaq
National  Market;  (ii) the  Common  Shares  are  traded  on the New York  Stock
Exchange,  the American Stock Exchange or the Nasdaq National Market at a Market
Price  greater than U.S.  $8.00 per Common  Share on each of the 10  consecutive
trading  days  preceding  such  date;  and (iii) the  Corporation's  net  income
(excluding  profit or loss on disposal of a  significant  part of the  Company's
assets or separate segment thereof,  gains on restructuring  payables,  gains or
losses on the  extinguishment  of debt,  expropriations  of  property,  gains or
losses  that are the  direct  result of a major  casualty,  or  one-time  losses
resulting from  prohibition  under a  newly-enacted  law or  regulation)  before
income  taxes,  Dividends  on the  shares  of this  Series  and on the  Series B
Convertible Shares and amortization of goodwill and covenants not to compete for
the three  consecutive  fiscal  quarters  preceding such date, as reported in or
derived  from the  Corporation's  quarterly  or annual  reports  filed  with the
Securities and Exchange Commission,  shall have averaged at least U.S. $0.22 per
fully diluted Common Share per fiscal quarter, provided, however, in making such
calculation,  the Common Shares issuable upon exercise of the warrants issued to
Warburg, Pincus Ventures, L.P. ("Warburg"), pursuant to that certain Amended and
Restated  Warrant  Agreement  between the  Corporation  and Warburg  relating to
warrants to purchase  2,000,000 Common Shares (the "Amended and Restated Warrant
Agreement"), shall be excluded but Common Shares issuable upon the conversion of
the shares of this Series and the Series B  Convertible  Shares  shall not.  All
references  to per  share  amounts  or prices  with  respect  to the  Triggering
Conditions shall be appropriately  adjusted for any subdivision,  consolidation,
or reclassification of the Common Shares.  Until the Triggering  Conditions have
been satisfied,  the Dividend rate per annum shall be (A) 15% of the Base Amount
per  share of this  Series  from and  after  January  1,  2003  and  payable  in
accordance with Section 2(c) hereof  commencing  January 1, 2004; (B) 18% of the
Base Amount per share of this Series from and after  January 1, 2004 and payable
in  accordance  with Section  2(c) hereof  commencing  January 1, 2005;  and (C)
thereafter,  21% of the Base  Amount  per  share of this  Series  from and after
January 1, 2005 and payable in  accordance  with Section 2(c) hereof  commencing
January 1, 2006.  Upon the  satisfaction of all the Triggering  Conditions,  the
Dividend per share of this Series shall be computed  based upon a rate per annum
of 5% of the Base Amount. Accruals of Dividends shall not bear


                                       -3-

<PAGE>


interest. All Dividends declared upon the shares of this Series shall be
declared pro rata per share.

     "(c) The record date for the determination of the holders of shares of this
Series who shall be entitled to receive  Dividends  (the "Record Date") shall be
the first  business day of each calendar year, and only the holders of shares of
this  Series of record on the Record  Date  shall be  entitled  to receive  such
Dividends.  All Dividends payable to such holders of record shall be paid on the
tenth  business  day  following  the Record Date on each issued and  outstanding
share of this Series.

     "(d) Dividends payable on shares of this Series for any period other than a
full dividend period shall be computed on the basis of a 360-day year consisting
of twelve  30-day  months.  Any  Dividend  payment made on shares of this Series
shall first be credited  against the earliest  accumulated but unpaid  Dividends
due with respect to the shares of this Series.

     "(e) No dividends shall be declared or paid or set aside for payment on any
share capital of the Corporation  ranking, as to dividends,  on a parity with or
subordinate to the shares of this Series for any period unless full  accumulated
Dividends have been or contemporaneously are declared and paid or declared and a
sum sufficient for the payment  thereof set aside for such payment on the shares
of this Series for all Dividend  periods  terminating on or prior to the date of
payment of such dividends.  When Dividends are not paid in full on the shares of
this  Series and any other  preferred  shares of the  Corporation  ranking  with
respect to payment of dividends on a parity with the shares of this Series,  all
dividends  declared or paid upon shares of this Series and such other  preferred
shares  shall be  declared  and paid pro rata so that the  amount  of  dividends
declared and paid on the shares of this Series and such other  preferred  shares
shall in all cases bear to each other the same ratio that accumulated  dividends
per share (which in the case of noncumulative preferred shares shall not include
any accumulation in respect of unpaid  dividends for prior dividend  periods) on
shares of this Series and such other preferred shares bear to each other. Except
as provided in the preceding  sentence,  unless full accumulated  Dividends have
been paid or declared and a sum sufficient for the payment thereof set aside for
payment,  no dividends  (other than  dividends or  distributions  paid in Common
Shares,  or options,  warrants  or rights to  subscribe  for or purchase  Common
Shares, or, in each case, any other series of shares of the Corporation  ranking
subordinate  to the shares of this Series as to dividends and upon  liquidation)
shall be declared and paid or a sum sufficient for the payment thereof set aside
for payment or any other  distribution  declared or made upon the Common Shares,
Series


                                       -4-

<PAGE>


B  Convertible  Shares or any other class of shares of the  Corporation  ranking
subordinate  to or on a parity with the shares of this Series as to dividends or
upon liquidation. No Common Shares, Series B Convertible Shares or shares of any
other class of shares of the Corporation  ranking  subordinate to or on a parity
with the shares of this  Series as to  dividends  or upon  liquidation  shall be
redeemed, purchased, retired or otherwise acquired for any consideration (and no
funds shall be paid to or made  available for a sinking fund for the  redemption
of any such share  capital) by the  Corporation  (except by  conversion  into or
exchange for shares of the Corporation ranking subordinate to the shares of this
Series as to  dividends  and upon  liquidation  or except with respect to Common
Shares that the Corporation has become obligated to redeem prior to the issuance
of any shares of this Series upon the  occurrence  of  specified  circumstances)
unless,  in each case, the full  accumulated  Dividends  shall have been paid or
declared  and a sum  sufficient  for the payment  thereof set aside for payment.
Holders of shares of this Series shall not be entitled to any dividend,  whether
payable in cash,  property  or stock,  in excess of the full  Dividends  on such
shares.

     "(f) Upon  conversion  of any shares of this  Series by any holder  thereof
pursuant to Section 7 hereof,  any Dividends  accrued and payable to such holder
shall be forfeited and the Corporation shall have no further  obligation to such
holder of shares of this Series for such accumulated Dividends.

     "3. Liquidation Rights. (a) In the event of any voluntary or involuntary
dissolution, liquidation, or winding up of the affairs of the Corporation, after
payment or provision for payment of the debts and other liabilities of the
Corporation and any preferential amounts payable with respect to securities of
the Corporation ranking prior to the shares of this Series ("Senior Preferred
Shares"), the holders of shares of this Series shall be entitled to receive out
of the assets of the Corporation available for distribution to shareholders,
before any distribution of assets is made to holders of the Common Shares or any
other share capital of the Corporation ranking subordinate to the shares of this
Series, a liquidating distribution in an amount equal to the greater of (i) U.S.
$6.75 per share of this Series plus an amount equal to any accrued and unpaid
Dividends (including accumulated Dividends, whether or not declared) to and
including the date of distribution or (ii) the amount distributable to the
holders of shares of this Series as if such holders had converted their shares
of this Series into Common Shares pursuant to Section 7 hereof immediately prior
to such dissolution, liquidation or winding up of the affairs of the Corporation
(plus accumulated Dividends, whether or not declared). Amounts


                                       -5-

<PAGE>


payable pursuant to clause (i) or (ii) of this Section 3(a) shall be distributed
ratably  among the holders of shares of this Series in  proportion to the number
of shares of this Series  held.  After  payment to the holders of shares of this
Series of the full amount to which such holders are entitled as set forth above,
the holders of shares of this Series  shall have no right or claim to any of the
remaining assets of the Corporation.

     "(b) If upon any such dissolution, liquidation or winding up of the affairs
of the  Corporation,  the  assets  of the  Corporation  distributable  among the
holders of shares of this Series and the holders of all other  classes or series
of shares of the Corporation  ranking on a parity with the shares of this Series
shall be  insufficient  to permit the  payment to them of the full  preferential
amounts to which they are entitled, then the entire assets of the Corporation so
to be distributed  shall be  distributed  ratably among the holders of shares of
this  Series and such other  classes or series of shares of the  Corporation  in
proportion  to  the  sum  of  the  accumulated  dividends  and  the  liquidation
preferences per share.

     "(c)  The  sale,   conveyance,   mortgage,   pledge  or  lease  of  all  or
substantially  all  the  assets  of the  Corporation  shall  be  deemed  to be a
liquidation,  dissolution or winding up of the  Corporation for purposes of this
Section 3.

     "4. Optional Redemption.  (a) The shares of this Series may not be redeemed
before the fifth  anniversary  of the Initial  Issuance  Date.  Thereafter,  the
shares of this Series shall be redeemable  (subject to subsection 4(d) below) at
the option of the  Corporation,  in whole or in part, at the  redemption  price,
which  shall be an amount  equal to the  greater of (i) U.S.  $6.75 per share of
this Series plus the amount of any  accrued  and unpaid  Dividends  per share of
this Series (including accumulated  Dividends,  whether or not declared) or (ii)
the Fair Market Value of a share of this Series (as defined below). For purposes
hereof,  the Fair Market Value shall be  determined  by a nationally  recognized
independent  investment  banking firm mutually  agreed to by the Corporation and
the holder of a majority of the shares of this Series  then  outstanding,  whose
determination shall be conclusive.

     "(b) (i) In case the  Corporation  shall  desire to  exercise  its right to
redeem any shares of this  Series,  it shall give notice of such  redemption  to
holders of the shares of this Series to be redeemed as  hereinafter  provided in
this Section 4(b).

          "(ii) Notice of redemption  shall be given to the holders of shares of
     this Series to be redeemed by mailing  such notice by  first-class  mail to
     their last


                                       -6-

<PAGE>


     addresses  as they shall  appear upon the  register  for the shares of this
     Series  not less  than 120  calendar  days  prior  to the  date  fixed  for
     redemption.

          "(iii) Each such notice of redemption (A) shall specify the date fixed
     for redemption and the redemption  price at which shares of this Series are
     to be redeemed,  (B) shall state that payment of the  redemption  price for
     the  shares of this  Series to be  redeemed  will be made at the  principal
     executive  offices of the Corporation,  upon  presentation and surrender of
     certificates  representing such shares of this Series, and (C) if less than
     all the shares of this Series are to be redeemed,  shall specify the number
     of shares of this Series held by each  holder to be  redeemed.  In case any
     certificate  representing  shares of this  Series is to be redeemed in part
     only,  the notice of  redemption  which relates to such  certificate  shall
     state the number of shares of this Series  represented by such  certificate
     to be redeemed and shall state that on and after the redemption  date, upon
     surrender of such  certificate,  a new  certificate or  certificates  for a
     number of shares of this Series  equal to the  unredeemed  portion  thereof
     will be issued.

          "(iv) If less than all the shares of this  Series are to be  redeemed,
     the  Corporation  shall effect such  redemption  pro rata among the holders
     thereof  (based on the number of shares of this  Series held on the date of
     notice of redemption).

     "(c) (i) If the giving of notice of redemption shall have been completed as
provided above,  the shares of this Series specified in such notice shall become
redeemable,  and shall be  redeemed by the  Corporation  upon  presentation  and
surrender of the certificate  representing  such shares,  on the date and at the
place stated in such notice at the redemption  price, and on and after such date
fixed for  redemption,  notwithstanding  that any certificate for shares of this
Series  so  called  for  redemption   shall  not  have  been   surrendered   for
cancellation,  unless  there  shall  have  been  a  default  in  payment  of the
redemption  price,  all shares of this  Series  called for  redemption  shall no
longer be deemed to be  outstanding,  and all rights with respect to such shares
of this Series shall forthwith cease and terminate  except only the right of the
holders thereof to receive from the Corporation  the redemption  price,  without
interest, of the shares to be redeemed,  and such shares shall not thereafter be
transferred on the books of the  Corporation or be deemed to be outstanding  for
any purpose whatsoever.

          "(ii) Upon presentation of any certificate representing shares of this
     Series only a portion of which are to be redeemed, the Corporation shall


                                       -7-

<PAGE>


     immediately  issue,  at its  expense,  a new  certificate  or  certificates
     representing the shares of this Series not redeemed.

     "(d) Except as provided in paragraph (a) above, the Corporation  shall have
no right to redeem  the  shares of this  Series.  Any  shares of this  Series so
redeemed shall be permanently retired, shall no longer be deemed outstanding and
shall not under any circumstances be reissued, and the Corporation may from time
to time take such appropriate corporate action as may be necessary to reduce the
authorized  shares of this Series  accordingly.  Nothing herein  contained shall
prevent or restrict the purchase by the Corporation, from time to time either at
public or private sale, of the whole or any part of the shares of this Series at
such price or prices as the Corporation may determine, subject to the provisions
of applicable law.

     "5. No Mandatory Redemption. The shares of this Series shall not be subject
to mandatory redemption by the Corporation.

     "6. Voting  Rights.  (a) Each issued and  outstanding  share of this Series
shall be entitled to the number of votes equal to the number of Common Shares of
the  Corporation  into which each such share of this Series is  convertible  (as
adjusted from time to time pursuant to Section 7(a) hereof),  at each meeting of
shareholders of the Corporation with respect to any and all matters presented to
the shareholders of the Corporation for their action or consideration. Except as
provided by law, by the  provisions of paragraph (b) below or by the  provisions
establishing any other series of preferred stock of the Corporation,  holders of
the shares of this  Series and of any other  outstanding  preferred  stock shall
vote together with the holders of Common Shares as a single class.

     (b) In addition to any other rights provided by law, the Corporation  shall
not amend,  alter or repeal the  preferences,  special rights or other powers of
the shares of this Series or any other provision of the Corporation's constating
documents that would adversely affect the rights of the holders of the shares of
this Series, including, without limitation, any increase in the number of shares
of this Series,  without the written consent or affirmative  vote of the holders
of at least 66-2/3% of the then  outstanding  aggregate number of such adversely
affected  shares  of this  Series,  given in  writing  or by vote at a  meeting,
consenting  or  voting  (as the case  may be)  separately  as a class.  For this
purpose,  the  authorization or issuance of any series of preferred stock of the
Corporation  with  preference  or priority  over,  or being on a parity with the
shares of this  Series as to the right to receive  either  dividends  or amounts
distributable upon liquidation, dissolution or


                                       -8-

<PAGE>


winding up of the Corporation shall be deemed to adversely affect the shares of
this Series.

     "7. Conversion. (a) Each share of this Series may be converted at any time,
at the option of the holder thereof,  in the manner hereinafter  provided,  into
fully-paid and  nonassessable  Common  Shares,  provided,  however,  that on any
redemption of any shares of this Series or any  liquidation of the  Corporation,
the right of  conversion  shall  terminate  at the close of business on the full
business  day next  preceding  the date  fixed  for such  redemption  or for the
payment of any amounts distributable on liquidation to the holders of the shares
of this Series.  The initial  conversion rate for shares of this Series shall be
one Common Share for each one share of this Series  surrendered  for conversion,
representing an initial  conversion price (for purposes of Section 7(g)) of U.S.
$6.75 per share of the Corporation's Common Shares (hereinafter, the "Conversion
Price").  The applicable  conversion rate and Conversion Price from time to time
in effect are subject to adjustment as hereinafter provided.

     "(b) Whenever the Conversion Price shall be adjusted as provided in Section
7(g) hereof,  the Corporation shall forthwith file at each office designated for
the conversion of the shares of this Series,  a statement,  signed by any of the
Chairman of the Board, the President, any Vice President or the Treasurer of the
Corporation,  showing in reasonable  detail the facts requiring such adjustment.
The Corporation  shall also cause a notice setting forth any such adjustments to
be sent by mail, first class,  postage prepaid,  to each record holder of shares
of this Series at his or its address  appearing on the stock  register.  If such
notice relates to an adjustment resulting from an event referred to in paragraph
7(g)(vii),  such notice  shall be included as part of the notice  required to be
mailed and published under the provisions of paragraph 7(g)(vii) hereof.

     "(c) The  right of  conversion  shall be  exercised  by the  holder  by the
surrender of the certificates representing shares of this Series to be converted
to the  Corporation  at any time during normal  business  hours at the office or
agency then  maintained  by it for the  conversion of shares of this Series (the
"Conversion  Office"),  accompanied by written notice to the Corporation of such
holder's  election to convert  and, if so  required  by the  Corporation  or any
conversion  agent,  by an instrument of transfer,  in form  satisfactory  to the
Corporation and to any conversion  agent, duly executed by the registered holder
or by such holder's duly authorized  attorney,  and transfer tax stamps or funds
therefor, if required pursuant to Section 7(k).

     "(d) As promptly as practicable after the surrender for conversion of one
or more certificates representing any


                                       -9-

<PAGE>


shares of this Series in the manner  provided in Section 7(c) and the payment in
cash of any amount  required by the provisions of Section 7(k), the  Corporation
will deliver or cause to be delivered  at the  Conversion  Office to or upon the
written  order of the  holder of such  shares,  a  certificate  or  certificates
representing  the number of full Common Shares  issuable  upon such  conversion,
issued  in such  name or  names  as  such  holder  may  direct,  subject  to any
applicable  contractual  restrictions and any restrictions imposed by applicable
securities  laws. Such conversion  shall be deemed to have been made immediately
prior to the close of business  on the date of such  surrender  of  certificates
representing  shares  of this  Series in proper  order for  conversion,  and all
rights of the holder of such  shares as a holder of such  shares  shall cease at
such time, and the person or persons in whose name or names the certificates for
such Common  Shares are to be issued shall be treated for all purposes as having
become the record  holder or holders  thereof at such time;  provided,  however,
that any  such  surrender  on any date  when  the  stock  transfer  books of the
Corporation shall be closed shall constitute the person or persons in whose name
or names the  certificates for such Common Shares are to be issued as the record
holder or holders  thereof for all  purposes  immediately  prior to the close of
business  on the next  succeeding  day on which  such stock  transfer  books are
opened.

     "(e) Upon  conversion  in the manner  provided in this  Section 7 of only a
portion of the number of shares of this Series  represented  by a certificate so
surrendered for conversion,  the Corporation shall issue and deliver or cause to
be delivered at the Conversion Office to or upon the written order of the holder
of  the  certificate  so  surrendered  for  conversion,  at the  expense  of the
Corporation, a new certificate or certificates representing the number of shares
of this  Series  representing  the  unconverted  portion of the  certificate  so
surrendered,  issued in such name or names as such holder may direct, subject to
any  applicable  contractual   restrictions  and  any  restrictions  imposed  by
applicable securities laws.

     "(f) All  shares of this  Series  which  shall  have been  surrendered  for
conversion as herein  provided shall no longer be deemed to be  outstanding  and
all rights with respect to such shares, including the rights, if any, to receive
notices and to vote,  shall forthwith cease and terminate  except only the right
of the holder thereof to receive Common Shares in exchange therefor.  Any shares
of this  Series so  converted  shall be retired  and  canceled  and shall not be
reissued, and the Corporation may from time to time take such appropriate action
as may be necessary to reduce the authorized shares of this Series accordingly.


                                      -10-

<PAGE>


     "(g) Anti-Dilution Provisions.

     (i) In order to  prevent  dilution  of the  right  granted  hereunder,  the
Conversion  Price shall be subject to adjustment from time to time in accordance
with this paragraph  7(g)(i).  At any given time the  Conversion  Price shall be
that  dollar  (or  part of a  dollar)  amount  the  payment  of  which  shall be
sufficient at the given time to acquire one Common Share of the Corporation upon
conversion  of shares of this Series.  Upon each  adjustment  of the  Conversion
Price  pursuant to this Section 7(g),  the  registered  holder of shares of this
Series shall thereafter be entitled to acquire upon exercise,  at the Conversion
Price  resulting  from such  adjustment,  the  number  of  Common  Shares of the
Corporation obtainable by multiplying the Conversion Price in effect immediately
prior to such  adjustment  by the  number  of  shares  of  Common  Shares of the
Corporation  acquirable  immediately  prior to such  adjustment and dividing the
product thereof by the Conversion  Price  resulting from such a adjustment.  For
purposes  of this  Section  7(g),  the term  "Number  of  Common  Shares  Deemed
Outstanding" at any given time shall mean the sum of (x) the number of shares of
the  Corporation's  Common Shares  outstanding  at such time,  (y) the number of
Common Shares of the Corporation  issuable  assuming  conversion at such time of
all  outstanding  shares  of  the  Corporation's  other  series  of  convertible
preferred  stock, if any, and (z) the number of Common Shares of the Corporation
deemed to be  outstanding at such time under  subparagraphs  7(g)(ii)(1) to (8),
inclusive.

     (ii) Except as provided in paragraph  7(g)(iii) or 7(g)(vi)  below,  if and
whenever on or after the Initial  Issuance Date, the Corporation  shall issue or
sell, or shall in accordance with subparagraphs  7(g)(ii)(1) to (8),  inclusive,
be deemed to have  issued or sold  (such  issuance  or sale,  whether  actual or
deemed, the "Triggering  Transaction") any Common Shares for a consideration per
share less than,

          (I)  (if the  Common  Shares  are not  traded  on the New  York  Stock
     Exchange,  the American Stock Exchange or the Nasdaq  National  Market) the
     Conversion Price in effect  immediately  prior to the time of such issuance
     or sale,  then forthwith  upon such issuance or sale the  Conversion  Price
     shall,  subject to subparagraphs  (1) to (8) of this Section  7(g)(ii),  be
     reduced to the Conversion Price (calculated to the nearest tenth of a cent)
     determined  by dividing:  (i) an amount equal to the sum of (x) the product
     derived by  multiplying  the  Number of Common  Shares  Deemed  Outstanding
     immediately  prior to such Triggering  Transaction by the Conversion  Price
     then in effect, plus (y) the consideration, if any, received by the Company
     upon consummation of such Triggering Transaction, by (H) an amount equal to
     the sum of (x) the Number of Common Shares Deemed  Outstanding  immediately
     prior to such Triggering  Transaction  plus (y) the number of Common Shares
     issued (or deemed to be issued


                                      -11-

<PAGE>


     in accordance with subparagraphs 7(g)(ii)(l) to (8)) in connection with the
     Triggering Transaction; or

          (II) (if the Common Shares are traded on the New York Stock  Exchange,
     the  American  Stock  Exchange or the Nasdaq  National  Market) the average
     Market Price for the ten trading days  immediately  preceding such issuance
     or sale,  then forthwith upon such Triggering  Transaction,  the Conversion
     Price shall,  subject to subparagraphs (1) to (8) of this Section 7(g)(ii),
     be reduced to the  Conversion  Price  (calculated to the nearest tenth of a
     cent) determined by multiplying the Conversion Price in effect  immediately
     prior  to the  time of  such  Triggering  Transaction  by a  fraction,  the
     numerator  of which  shall be the sum of (x) the  Number of  Common  Shares
     Deemed Outstanding immediately prior to such Triggering Transaction and (y)
     the number of Common Shares which the aggregate  consideration  received by
     the Company upon such Triggering  Transaction would purchase at the average
     Market Price for the ten trading days immediately preceding such Triggering
     Transaction,  and the  denominator  of which  shall be the Number of Common
     Shares Deemed Outstanding immediately after such Triggering Transaction.

     For  purposes  of  determining  the  adjusted  Conversion  Price under this
paragraph 7(g)(ii),  the following  subsections (1) to (8), inclusive,  shall be
applicable:

          (1) In case the  Corporation  at any time  shall in any  manner  grant
     (whether  directly or by assumption in an  amalgamation  or otherwise)  any
     rights to subscribe for or to purchase, or any options for the purchase of,
     Common  Shares  or any  stock  or  other  securities  convertible  into  or
     exchangeable  for Common Shares (such rights or options being herein called
     "Options" and such  convertible or exchangeable  stock or securities  being
     herein called "Convertible Securities"), whether or not such Options or the
     right  to  convert  or  exchange  any  such   Convertible   Securities  are
     immediately  exercisable,  and the price  per  share  for which the  Common
     Shares are issuable upon  exercise,  conversion or exchange  (determined by
     dividing  (x) the total  amount,  if any,  received  or  receivable  by the
     Corporation  as  consideration  for the granting of such Options,  plus the
     aggregate  amount of additional  consideration  payable to the  Corporation
     upon the exercise of all such  Options,  plus,  in the case of such Options
     which relate to Convertible Securities,  the aggregate amount of additional
     consideration,  if any,  payable upon the issue or sale of such Convertible
     Securities  and upon the conversion or exchange  thereof,  by (y) the total
     maximum number of Common Shares  issuable upon the exercise of such Options
     or the conversion or exchange of such Convertible Securities) shall be less
     than the average Market Price in effect


                                      -12-

<PAGE>


     for the ten trading days  immediately  prior to the time of the granting of
     such  Option  (if the  Common  Shares  are  traded  on the New  York  Stock
     Exchange, the American Stock Exchange or the Nasdaq National Market) or the
     Conversion Price in effect  immediately  prior to the time of such issuance
     or  sale  (if the  Common  Shares  are not  traded  on the New  York  Stock
     Exchange,  the American Stock Exchange or the Nasdaq National Market), then
     the total  maximum  amount of Common  Shares  issuable upon the exercise of
     such Options or, in the case of Options for  Convertible  Securities,  upon
     the conversion or exchange of such Convertible Securities, shall (as of the
     date of granting of such Options) be deemed to be  outstanding  and to have
     been  issued  and sold by the  Corporation  for such  price per  share.  No
     adjustment of the Conversion  Price shall be made upon the actual  issuance
     of such Common Shares or such  Convertible  Securities upon the exercise of
     such Options, except as otherwise provided in subparagraph (3) below.

          (2) In case the  Corporation  at any time  shall in any  manner  issue
     (whether directly or by assumption in an amalgamation or otherwise) or sell
     any  Convertible  Securities,  whether  or not the  rights to  exchange  or
     convert thereunder are immediately exercisable, and the price per share for
     which  Common  Shares  are  issuable  upon  such   conversion  or  exchange
     (determined by dividing (x) the total amount  received or receivable by the
     Corporation  as  consideration  for the  issue or sale of such  Convertible
     Securities, plus the aggregate amount of additional consideration,  if any,
     payable to the Corporation upon the conversion or exchange thereof,  by (y)
     the total maximum  number of Common Shares  issuable upon the conversion or
     exchange of all such Convertible Securities) shall be less than the average
     Market Price in effect for the ten-day trading period  immediately prior to
     the time of such issue or sale (if the Common  Shares are traded on the New
     York Stock  Exchange,  the American Stock  Exchange or the Nasdaq  National
     Market) or the Conversion Price in effect  immediately prior to the time of
     such  issuance or sale (if the Common Shares are not traded on the New York
     Stock Exchange, the American Stock Exchange or the Nasdaq National Market),
     then the total maximum number of Common Shares  issuable upon conversion or
     exchange of all such  Convertible  Securities  shall (as of the date of the
     issue or sale of such  Convertible  Securities) be deemed to be outstanding
     and to have been  issued  and sold by the  Corporation  for such  price per
     share. No adjustment of the Conversion  Price shall be made upon the actual
     issuance of such Common  Shares upon  exercise of the rights to exchange or
     convert under such Convertible Securities,  except as otherwise provided in
     subparagraph (3) below.


                                      -13-

<PAGE>


          (3) If the purchase price  provided for in any Options  referred to in
     subparagraph  (1), the additional  consideration,  if any, payable upon the
     conversion  or  exchange  of  any  Convertible  Securities  referred  to in
     subparagraphs  (1) or (2), or the rate at which any Convertible  Securities
     referred to in subparagraph (1) or (2) are convertible into or exchangeable
     for Common  Shares  shall change at any time (other than under or by reason
     of provisions designed to protect against dilution of the type set forth in
     paragraphs  7(g)(ii) or 7(g)(iv)),  the  Conversion  Price in effect at the
     time of such change shall  forthwith be readjusted to the Conversion  Price
     which  would  have  been in  effect  at  such  time  had  such  Options  or
     Convertible Securities still outstanding provided for such changed purchase
     price,  additional  consideration  or rate, as the case may be, at the time
     initially  granted,  issued or sold. If the purchase  price provided for in
     any Option referred to in subparagraph (1) or the additional consideration,
     if  any,  payable  upon  the  conversion  or  exchange  of any  Convertible
     Securities  referred to in  subparagraphs  (1) or (2), or the rate at which
     any  Convertible  Securities  referred to in  subparagraphs  (1) or (2) are
     convertible into or exchangeable for Common Shares, shall be reduced at any
     time under or by reason of  provisions  with  respect  thereto  designed to
     protect  against  dilution,  then in case of the delivery of Common  Shares
     upon the exercise of any such Option or upon  conversion or exchange of any
     such  Convertible  Security,  the Conversion Price then in effect hereunder
     shall  forthwith be adjusted to such  respective  amount as would have been
     obtained had such Option or  Convertible  Security  never been issued as to
     such Common Shares and had  adjustments  been made upon the issuance of the
     Common  Shares  delivered  as  aforesaid,  but only if as a result  of such
     adjustment the Conversion Price then in effect hereunder is hereby reduced.

          (4) On the expiration of any Option or the termination of any right to
     convert or exchange any Convertible  Securities,  the Conversion Price then
     in effect  hereunder shall  forthwith be increased to the Conversion  Price
     which  would  have  been  in  effect  at the  time of  such  expiration  or
     termination  had such  Option  or  Convertible  Securities,  to the  extent
     outstanding immediately prior to such expiration or termination, never been
     issued.

          (5) In case any Options shall be issued in  connection  with the issue
     or sale of other  securities of the  Corporation,  together  comprising one
     integral  transaction  in which no specific  consideration  is allocated to
     such Options by the parties thereto, such


                                      -14-

<PAGE>


     Options shall be deemed to have been issued without consideration.

          (6) In case any Common Shares, Options or Convertible Securities shall
     be  issued or sold or  deemed  to have  been  issued or sold for cash,  the
     consideration  received  therefor shall be deemed to be the amount received
     by the Corporation therefor (before deduction for expenses or underwriters'
     discounts or commissions related to such issue or sale). In case any Common
     Shares,  Options or  Convertible  Securities  shall be issued or sold for a
     consideration  other than cash, the amount of the consideration  other than
     cash  received  by  the  Corporation  shall  be  the  fair  value  of  such
     consideration  as determined in good faith by the Board of Directors of the
     Corporation.

          (7) In case the Corporation shall declare a dividend or make any other
     distribution  upon the share capital of the  Corporation  payable in Common
     Shares,  Options, or Convertible  Securities,  then in such case any Common
     Shares, Options or Convertible Securities,  as the case may be, issuable in
     payment  of such  dividend  or  distribution  shall be  deemed to have been
     issued or sold without consideration.

          (8) For purposes of this paragraph  7(g)(ii),  in case the Corporation
     shall take a record of the holders of its Common  Shares for the purpose of
     entitling them (x) to receive a dividend or other  distribution  payable in
     Common Shares,  Options or in Convertible  Securities,  or (y) to subscribe
     for or purchase Common Shares, Options or Convertible Securities, then such
     record  date  shall be  deemed  to be the date of the  issue or sale of the
     Common  Shares deemed to have been issued or sold upon the  declaration  of
     such dividend or the making of such other  distribution  or the date of the
     granting of such right or subscription or purchase, as the case may be.

     (iii) In the event the Corporation shall declare a dividend upon the Common
Shares (other than a dividend  payable in Common Shares covered by  subparagraph
7(g)(ii)(7))   payable  otherwise  than  out  of  earnings  or  earned  surplus,
determined  in  accordance  with  generally  accepted   accounting   principles,
including the making of appropriate  deductions for minority interests,  if any,
in subsidiaries (herein referred to as "Liquidating  Dividends"),  then, as soon
as possible after the conversion of any shares of this Series,  the  Corporation
shall,  subject to applicable  law, pay to the person  converting such shares of
this Series an amount equal to the aggregate  value at the time of such exercise
of all  Liquidating  Dividends  (including  but not limited to the Common Shares
which would have been issued at the time of such earlier  exercise and all other
securities


                                      -15-

<PAGE>


which  would have been issued  with  respect to such Common  Shares by reason of
stock splits,  stock  dividends,  amalgamations or  reorganizations,  or for any
other reason).  For the purposes of this paragraph  7(g)(iii),  a dividend other
than in cash shall be considered  payable out of earnings or earned surplus only
to the extent that such  earnings or earned  surplus are charged an amount equal
to the fair value of such dividend as determined in good faith by the Board.

     (iv) In case the  Corporation  shall at any time  subdivide  (other than by
means of a dividend  payable in Common Shares covered by paragraph  7(g)(ii)(7))
its  outstanding  Common Shares into a greater number of shares,  the Conversion
Price in effect  immediately prior to such subdivision shall be  proportionately
reduced,  and,  conversely,  in  case  the  outstanding  Common  Shares  of  the
Corporation  shall be combined into a smaller  number of shares,  the Conversion
Price in effect  immediately prior to such combination shall be  proportionately
increased.

     (v) If any capital  reorganization or reclassification of the share capital
of the Corporation, or amalgamation of the Corporation with another corporation,
or the sale of all or  substantially  all of its assets to  another  corporation
shall be effected in such a way that holders of Common  Shares shall be entitled
to receive  stock,  securities,  cash or other  property  with  respect to or in
exchange  for  Common  Shares,  then,  as a  condition  of such  reorganization,
reclassification,  amalgamation or sale, lawful and adequate  provision shall be
made  whereby  the  holders  of shares of this  Series  shall  have the right to
acquire and receive upon  conversion  of the shares of this Series,  which right
shall be prior to the  rights of the  holders of stock  ranking  on  liquidation
junior to this  Series (but after and subject to the rights of holders of Senior
Preferred  Shares,  if any),  such  shares of stock,  securities,  cash or other
property issuable or payable (as part of the  reorganization,  reclassification,
amalgamation  or  sale)  with  respect  to or in  exchange  for such  number  of
outstanding  Common Shares of the  Corporation  as would have been received upon
conversion of the shares of this Series at the Conversion  Price then in effect.
The Corporation will not effect any such  amalgamation or sale,  unless prior to
the  consummation  thereof  the  amalgamated   corporation  or  the  corporation
purchasing such assets shall assume by written instrument mailed or delivered to
the holders of the shares of this Series at the last address of each such holder
appearing on the books of the  Corporation,  the  obligation  to deliver to each
such holder such shares of stock,  securities or assets as, in  accordance  with
the foregoing provisions, such holder may be entitled to receive. If a purchase,
tender or exchange offer is made to and accepted by the holders of more than 50%
of the outstanding  Common Shares of the Corporation,  the Corporation shall not
effect any  amalgamation  or sale with the person having made such offer or with
any  Affiliate  (as  defined  below)  of  such  person,   unless  prior  to  the
consummation  of such  amalgamation  or sale the  holders  of the shares of this
Series


                                      -16-

<PAGE>


shall have been given a reasonable opportunity to then elect to receive upon the
conversion of the shares of this Series  either the stock,  securities or assets
then issuable with respect to the Common Shares of the Corporation or the stock,
securities  or assets,  or the  equivalent,  issued to  previous  holders of the
Common  Shares in  accordance  with such offer.  For purposes  hereof,  the term
"Affiliate" with respect to any given person shall mean any person  controlling,
controlled by or under common control with the given person.

     (vi) The  provisions  of this  Section  7(g)  shall not apply to any Common
Shares issued, issuable or deemed outstanding under subparagraphs 7(g)(ii)(1) to
(8) inclusive: (i) to any person pursuant to any stock option, stock purchase or
similar plan or arrangement  for the benefit of employees of the  Corporation or
its subsidiaries in effect on the Initial Issuance Date or thereafter adopted by
the Board of Directors of the  Corporation,  (ii) pursuant to options,  warrants
and  conversion  rights in existence on the Initial  Issuance  Date,  (iii) upon
exercise of the warrants of the  Corporation  issued to Warburg  pursuant to the
Amended and Restated  Warrant  Agreement or (iv) on  conversion of the shares of
this Series or the sale of any additional shares of this Series.

     (vii) In the event that:

          (1) the Corporation shall declare any cash dividend upon its Common
     Shares, or

          (2) the Corporation  shall declare any dividend upon its Common Shares
     payable in stock or make any special dividend or other  distribution to the
     holders of its Common Shares, or

          (3) the  Corporation  shall  offer  for  subscription  pro rata to the
     holders of its Common Shares any additional shares of stock of any class or
     other rights, or

          (4) there shall be any capital  reorganization or  reclassification of
     the  share  capital  of  the  Corporation,  including  any  subdivision  or
     combination  of its  outstanding  Common  Shares,  or  amalgamation  of the
     Corporation  with,  or sale of all or  substantially  all of its assets to,
     another corporation, or

          (5) there shall be a voluntary or involuntary dissolution, liquidation
     or winding up of the Corporation;

then, in connection with such event,  the Corporation  shall give to the holders
of the shares of this Series:

          (A)  at least  twenty (20) days' prior  written  notice of the date on
               which the books of the Corporation  shall close or a record shall
               be taken for such


                                      -17-

<PAGE>


               dividend,  distribution or subscription rights or for determining
               rights   to  vote  in   respect   of  any  such   reorganization,
               reclassification, amalgamation, sale, dissolution, liquidation or
               winding up; and

          (B)  in  the  case  of  any  such  reorganization,   reclassification,
               amalgamation,  sale,  dissolution,  liquidation or winding up, at
               least twenty (20) days' prior written notice of the date when the
               same shall take place.

Such notice in accordance with the foregoing  clause (A) shall also specify,  in
the case of any such dividend,  distribution or subscription rights, the date on
which the holders of Common Shares shall be entitled thereto, and such notice in
accordance  with the  foregoing  clause (B) shall also specify the date on which
the holders of Common  Shares shall be entitled to exchange  their Common Shares
for  securities  or  other  property   deliverable  upon  such   reorganization,
reclassification, amalgamation, sale, dissolution, liquidation or winding up, as
the case may be. Each such  written  notice  shall be given by first class mail,
postage  prepaid,  addressed  to the holders of the shares of this Series at the
address of each such holder as shown on the books of the Corporation.

     (viii) If at any time or from time to time on or after the Initial Issuance
Date,  the  Corporation  shall  grant,  issue or sell any  Options,  Convertible
Securities or rights to purchase  property (the  "Purchase  Rights") pro rata to
the record  holders of the Common  Shares of the  Corporation  and such  grants,
issuances or sales do not result in an adjustment of the Conversion  Price under
paragraph  7(g)(ii)  hereof,  then each holder of shares of this Series shall be
entitled  to acquire  (within  thirty  (30) days after the later to occur of the
initial  exercise date of such Purchase  Rights or receipt by such holder of the
notice  concerning  Purchase Rights to which such holder shall be entitled under
paragraph  7(g)(vii))  and upon the terms  applicable  to such  Purchase  Rights
either:

          (A)  the aggregate Purchase Rights which such holder could have
               acquired if it had held the number of Common Shares acquirable
               upon conversion of shares of this Series immediately before the
               grant, issuance or sale of such Purchase Rights; provided that if
               any Purchase Rights were distributed to holders of Common Shares
               without the payment of additional consideration by such holders,
               corresponding Purchase Rights shall be distributed to the
               exercising holders of the shares of this Series as soon as
               possible after such exercise and it shall not be necessary for
               the exercising holder of the shares of this Series specifically
               to request delivery of such rights; or


                                      -18-

<PAGE>


          (B)  in the event that any such Purchase  Rights shall have expired or
               shall expire prior to the end of said thirty (30) day period, the
               number of Common  Shares or the  amount of  property  which  such
               holder  could have  acquired  upon such  exercise  at the time or
               times at which  the  Corporation  granted,  issued  or sold  such
               expired Purchase Rights.

     (ix) If any event  occurs as to which,  in the  opinion of the  Board,  the
provisions  of this  Section  7(g) are not  strictly  applicable  or if strictly
applicable  would not fairly  protect the rights of the holders of the shares of
this Series in  accordance  with the  essential  intent and  principles  of such
provisions,  then the Board shall make an adjustment in the  application of such
provisions,  in accordance with such essential  intent and principles,  so as to
protect such rights as aforesaid,  but in no event shall any adjustment have the
effect of increasing the Conversion  Price as otherwise  determined  pursuant to
any of the  provisions  of this Section 7(g) except in the case of a combination
of shares of a type  contemplated in paragraph  7(g)(iv) and then in no event to
an amount  larger than the  Conversion  Price as adjusted  pursuant to paragraph
7(g)(iv).

          "(h) No fractional  Common Shares shall be issued upon the  conversion
     of any share or shares of this  Series.  If any  fractional  interest  in a
     Common Share would,  except for the  provisions  of this Section  7(h),  be
     deliverable upon the conversion of any share or shares of this Series,  the
     Corporation  shall  in lieu  of  delivering  the  fractional  Common  Share
     therefor satisfy such fractional  interest by payment to the holder of such
     surrendered  share or  shares of this  Series  of an  amount in cash  equal
     (computed  to the  nearest  cent)  to the  current  market  value  of  such
     fractional  interest,  computed  on the  basis of the  Market  Price of the
     Common Shares on the date of such conversion,  provided,  however,  that no
     amount shall be paid by the Corporation to such holder of less than U.S.
     $5.00.

          "(i) The  Corporation  shall  be  entitled  to  effect  the  mandatory
     conversion, in whole or in part, of the shares of this Series in accordance
     with this  Section 7 if all of the  following  conditions  (the  "Mandatory
     Conversion  Conditions")  have been  satisfied as of the date of the notice
     described  below:  (i) the  Common  Shares are listed on the New York Stock
     Exchange,  the American Stock Exchange or the Nasdaq National Market;  (ii)
     the Common Shares are traded on the New York Stock  Exchange,  the American
     Stock Exchange or the Nasdaq National Market at a Market Price greater than
     U.S.  $8.00 per Common  Share on each of the 10  consecutive  trading  days
     preceding  such date;  and (iii) the  Corporation's  net income  (excluding
     profit or loss on disposal of a significant part of the Company's assets or
     separate segment thereof, gains on restructuring payables,  gains or losses
     on the extinguishment of debt, expropriations of property,


                                      -19-

<PAGE>


     gains or losses that are the direct result of a major casualty, or one-time
     losses resulting from prohibition  under a newly-enacted law or regulation)
     before income taxes,  Dividends on the shares of this Series and the Series
     B  Convertible  Shares and  amortization  of goodwill and  covenants not to
     compete for the three consecutive  fiscal quarters  preceding such date, as
     reported in or derived from the  Corporation's  quarterly or annual reports
     filed with the Securities and Exchange  Commission,  shall have averaged at
     least  U.S.  $0.22 per fully  diluted  Common  Share  per  fiscal  quarter,
     provided,  however, in making such calculation,  the Common Shares issuable
     upon exercise of the warrants issued to Warburg pursuant to the Amended and
     Restated  Warrant  Agreement,  shall be excluded but Common Shares issuable
     upon  the  conversion  of the  shares  of  this  Series  and the  Series  B
     Convertible Shares shall not. All references to per share amounts or prices
     with respect to the Mandatory Conversion  Conditions shall be appropriately
     adjusted for any subdivision,  consolidation,  or  reclassification  of the
     Common Shares.

     Upon such mandatory  conversion,  each share of this Series subject to such
conversion  shall  be  converted  into  Common  Shares  at  the  then  effective
Conversion  Price  for such  shares.  In case the  Corporation  shall  desire to
exercise  the right to  convert  all or, as the case may be,  any shares of this
Series in  accordance  with the right to do so, it shall  provide  notice to the
holders of the shares of this Series to be converted as hereinafter  provided in
this Section 7(i).

               "(i) A notice  of  conversion  shall be given to the  holders  of
          shares of this Series to be converted by mailing by  first-class  mail
          to their last  addresses  as they shall  appear upon the  register for
          shares of this  Series  not less than 120  calendar  days prior to the
          date fixed for conversion.

               "(ii) Each such notice of  conversion  (A) shall specify the date
          fixed for conversion  and the number of Common Shares  issuable to the
          holder of a share of this Series upon such conversion, (B) shall state
          the offices or agencies to be  maintained by the  Corporation  for the
          purpose of such  conversion,  upon  presentation and surrender of such
          shares  of this  Series  and (C) if less  than all the  shares of this
          Series are to be converted, shall specify the number of shares of this
          Series held by each holder, and the serial numbers of the certificates
          thereof, to be converted. In case any certificate  representing shares
          of  this  Series  is to be  converted  in part  only,  the  notice  of
          conversion which relates to such certificate shall state the number of
          shares of this Series  represented by such certificate to be converted
          and shall state that on and after the conversion  date, upon surrender
          of such certificate, a


                                      -20-

<PAGE>


          new certificate or certificates  for a number of shares of this Series
          equal to the unconverted portion thereof will be issued.

          "(j) The  Corporation  will at all times  reserve and keep  available,
     solely for the purposes of the issuance of Common Shares upon conversion of
     the shares of this  Series,  the full  number of Common  Shares as shall be
     issuable upon the conversion of all such outstanding shares of this Series.

          The  Corporation  will  endeavor  to comply with all  securities  laws
     regulating  the offer and delivery of Common Shares upon  conversion of the
     shares  of this  Series  and,  that if any  Common  Shares  required  to be
     reserved  for  purposes  of  conversion  of the  shares  hereunder  require
     registration with or approval of any governmental  authority under any U.S.
     (federal or state) or Canadian law before such Common Shares may be validly
     issued or delivered upon  conversion,  the Corporation  will, in good faith
     and as expeditiously as possible,  endeavor to secure such  registration or
     approval, as the case may be.

          "All Common Shares which shall be issued upon conversion of the shares
     of this Series will upon issuance be fully paid and  nonassessable  and not
     subject to preemptive rights.

          "(k) The issuance of certificates for Common Shares upon conversion of
     shares of this Series shall be made  without  charge for any stamp or other
     similar tax in respect of such issuance.  However,  if any such certificate
     is to be issued in a name  other  than that of the  holder of record of the
     share or shares of this Series so converted,  the holder  thereof shall pay
     to the Corporation the amount of any tax which may be payable in respect of
     any  transfer   involved  in  such  issuance  or  shall  establish  to  the
     satisfaction  of the  Corporation  that  such tax has  been  paid or is not
     payable.

          "(l) In case (A) the  Corporation  shall take any action  which  would
     require an adjustment in the number of Common Shares issuable to holders of
     shares of this  Series upon  conversion  thereof  pursuant to Section  7(g)
     above;  or (B)  there  shall be a  voluntary  or  involuntary  dissolution,
     liquidation  or winding  up of the  affairs  of the  Corporation;  then the
     Corporation  shall  cause to be given to the  holders of the shares of this
     Series at least ten days prior to the  applicable  record date  hereinafter
     specified,  a notice  of (X) the date on which a record  is to be taken for
     the  purpose of any  dividend,  distribution  or grant to holders of Common
     Shares which would require such an adjustment, or, if a record is not to be
     taken,  the date as of which the  holders of Common  Shares of record to be
     entitled to such dividend,  distribution,  or grant are to be determined or
     (Y) the date on which such reorganization, reclassification,


                                      -21-

<PAGE>


     amalgamation,  sale,  transfer,  dissolution,  liquidation or winding up is
     expected to become effective,  and the date as of which it is expected that
     holders of Common  Shares of record  shall be entitled  to  exchange  their
     Common Shares for securities or other property or other assets  deliverable
     upon such reorganization,  reclassification,  amalgamation, sale, transfer,
     dissolution, liquidation, or winding up. Failure to give such notice or any
     defect therein shall not affect the legality or validity of any proceedings
     described in subparagraphs (A) or (B) of this Section 7(l).

          "8.  Miscellaneous.

               "(a) For the purposes hereof:

                    "(i) the  term  "outstanding",  when  used in  reference  to
               shares of this Series,  shall mean issued  shares of this Series,
               excluding shares of this Series called for redemption; and

                    "(ii) any shares of a series or class of shares of the
               Corporation shall be deemed to rank:

                         "(A) prior to shares of this Series, whether or not the
                    dividend  rates,  dividend  payment  dates or  redemption or
                    liquidation prices per share thereof be different from those
                    of shares of this Series, if the holders of such shares of a
                    series or class of shares  shall be entitled to receipt from
                    the  Corporation  of dividends  or of amounts  distributable
                    upon  liquidation,  dissolution or winding up, in preference
                    or priority to the holders of shares of this Series,  as the
                    case may be;

                         "(B)  on a  parity  with or  equal  to  shares  of this
                    Series,  whether or not the dividend rates, dividend payment
                    dates or redemption or liquidation  prices per share thereof
                    be  different  from those of shares of this  Series,  if the
                    holders of such shares of a series or class of shares  shall
                    be entitled to the receipt from the Corporation of dividends
                    or  of  amounts  distributable  upon  liquidation  to  their
                    respective  dividend  rates or liquidation  prices,  without
                    preference  or  priority  one over the other as between  the
                    holders  of such  shares of a series or class of shares  and
                    the holders of shares of this Series; and

                         "(C)  subordinate to shares of this Series,  whether or
                    not the dividend rates, dividend payment dates or redemption
                    or  liquidation  prices per share thereof be different  from
                    those of


                                      -22-

<PAGE>


                    shares of this Series,  if the rights of the holders of such
                    shares of a series or class of shares  shall be  subordinate
                    to the  rights of the  holders  of shares of this  Series in
                    respect of the receipt from the Corporation of dividends and
                    of amounts  distributable  upon liquidation,  dissolution or
                    winding up, including, without limitation, the Common Shares
                    of the Corporation.

          "(b) So long as any  shares of this  Series  are  outstanding,  in the
     event of any  conflict  between  the  provisions  hereof and any  corporate
     document  of the  Corporation  (both as  presently  existing  or  hereafter
     amended and supplemented) the provisions hereof, as the same may be amended
     or supplemented, shall be and remain controlling.

          "(c) The holders of the shares of this Series shall have no preemptive
     rights.



<PAGE>


                                                                       EXHIBIT C




                                   SONUS CORP.

                 TERMS OF SERIES B CONVERTIBLE PREFERRED SHARES
                               (Without Par Value)



     "1. Number and Designation.  The number of shares to constitute this series
shall be  2,500,000  and the  designation  of such shares shall be the "Series B
Convertible Preferred Shares" (hereinafter called "this Series").  The number of
shares  constituting this Series may be decreased from time to time by action of
the Board,  but not below the number of shares of this Series then  outstanding.
All shares of this Series  shall be identical  with each other in all  respects.
The shares of this Series  shall rank senior to the common  shares (the  "Common
Shares")  of the  Corporation  and equal to the Series A  Convertible  Preferred
Shares ("Series A Convertible Shares") as to dividends and upon liquidation,  as
described  below.  Any amounts  herein  referencing  share  prices or numbers of
shares  shall be subject to  appropriate  adjustments  in the event of any stock
splits, consolidations or the like.

     "2. Dividend Rights.

     "(a) Subject to the  provisions of this Section 2, the holders of shares of
this Series shall be entitled to receive, when and as declared by the Board, out
of any funds  legally  available  therefor,  preferential  cumulative  dividends
("Dividends") (i) at a rate per annum per share equal to eight percent (8.0%) of
the Conversion  Price (as hereinafter  defined),  payable as provided in Section
2(b)  hereof,  through  October 31,  2004;  (ii) from  November 1, 2004  through
October 31, 2005; at a rate per annum per share equal to twelve percent  (12.0%)
of the Conversion Price,  payable in U.S.  dollars;  (iii) from November 1, 2005
through October 31, 2006, at a rate per annum per share equal to fifteen percent
(15.0%) of the  Conversion  Price,  payable in U.S.  dollars;  and (iv) from and
after November 1, 2006, at a rate per annum per share equal to eighteen  percent
(18.0%) of the  Conversion  Price,  payable  in U.S.  dollars.  Full  cumulative
Dividends  shall be paid before any dividends  shall be set apart for or paid in
any year upon the Common  Shares or any other  shares  ranking  as to  dividends
junior to this Series  (such Common  Shares and other  shares being  referred to
hereinafter collectively as "Junior Stock"). Accruals of Dividends under Section
2(b)(i) shall not bear interest.  All Dividends declared upon the shares of this
Series shall be declared pro rata per share.



<PAGE>


     "(b) (i) No  Dividends  on this Series will be declared  until  October 31,
2000.  At such time, if the  Corporation's  EBTA, as reported in or derived from
the  Corporation's   annual  report  filed  with  the  Securities  and  Exchange
Commission, for the fiscal year ended July 31, 2000, is equal to or greater than
U.S. $0.20  (excluding CFO Costs) per fully diluted Common Share, as measured to
include Common Shares  issuable upon the conversion of the shares of this Series
and the Series A Convertible  Shares but to exclude the Common  Shares  issuable
upon the exercise of the Warburg  Warrants (the "Fully Diluted Common  Shares"),
then the holders of shares of this Series  shall be entitled to receive when and
as declared by the Board out of assets legally available  therefor a Dividend in
respect of the period  beginning on the Initial Issuance Date (as defined below)
and  ending on October  31,  2000,  and each  quarter  thereafter,  in each case
payable in U.S.  dollars,  before any  dividends  shall be set apart for or paid
upon any Junior Stock in any year.  "EBTA" means net income (excluding profit or
loss on disposal of a significant part of the  Corporation's  assets or separate
segment  thereof,  gains  on  restructuring  payables,  gains or  losses  on the
extinguishment of debt, expropriations of property, gains or losses that are the
direct result of a major casualty, or one-time losses resulting from prohibition
under a newly-enacted law or regulation)  before income taxes,  Dividends on the
shares of this Series and the  Corporation's  Series A Convertible  Shares,  and
amortization  of goodwill and  covenants  not to compete.  "CFO Costs" means the
costs, if such person is hired by the Corporation on or before January 31, 2000,
of (i) retaining an executive search firm to hire a chief financial  officer for
the Corporation and (ii)  relocating such person.  "Warburg  Warrants" means the
warrants to purchase 2,000,000 Common Shares issued to Warburg, Pincus Ventures,
L.P. ("Warburg") pursuant to that certain amended and restated warrant agreement
between the Corporation and Warburg dated as of the Initial Issuance Date.

     (ii) If EBTA per Fully Diluted  Common Share for the fiscal year ended July
31, 2000 is less than U.S. $0.20 (excluding CFO Costs),  then Dividends will not
be payable until such time as the  Corporation  meets the quarterly EBTA targets
set forth below for four (4) consecutive  fiscal  quarters.  From and after such
time,  Dividends will be payable quarterly in cash in U.S.  dollars,  before any
dividends  shall be set apart for or paid upon any Junior Stock in any year.  If
the  Corporation has not met the quarterly EBTA targets set forth below for four
(4) consecutive  fiscal quarters by the fiscal quarter ended July 31, 2002, then
Dividends will not be payable on shares of this Series.


                                       -2-

<PAGE>


                                       Target EBTA per Fully Diluted
Period                                 Common Share
- ------                                 ------------------------------
Fiscal quarter ending 10/31/99         U.S. $0.02
Fiscal quarter ending 1/31/00                0.03
Fiscal quarter ending 4/30/00                0.07
Fiscal quarter ending 7/31/00                0.08
Fiscal quarter ending 10/31/00               0.07
Fiscal quarter ending 1/31/01                0.10
Fiscal quarter ending 4/30/01                0.15
Fiscal quarter ending 7/31/01                0.17
Fiscal quarter ending 10/31/01               0.16
Fiscal quarter ending 1/31/02                0.20
Fiscal quarter ending 4/30/02                0.26
Fiscal quarter ending 7/31/02                0.30


     "(c) To the extent  payable  pursuant to Section 2(b) hereof,  Dividends on
this Series shall accrue  quarterly on October 31, January 31, April 30 and July
31 of each year,  beginning  October 31, 1999, and shall be cumulative  from the
date of initial  issuance of the shares of this Series  (the  "Initial  Issuance
Date"),  whether or not earned or declared and whether or not in any fiscal year
there shall be assets,  net profits or surplus legally available for the payment
of such  Dividends in respect of such fiscal year, so that if in any fiscal year
or years,  Dividends are not paid upon shares of this Series in the full amounts
specified in Section  2(a)  hereof,  unpaid  Dividends  which are payable  under
Section 2(b) hereof shall  accumulate as against the holders of the Junior Stock
and any sums in any later years shall be paid to the holders of this Series with
respect to any prior year or years when Dividends were not paid.

     "(d) The record date for the determination of the holders of shares of this
Series who shall be entitled to receive  Dividends  (the "Record Date") shall be
thirty  (30) days prior to any payment  date,  and only the holders of shares of
this  Series of record on the Record  Date  shall be  entitled  to receive  such
Dividends.


                                       -3-

<PAGE>


     "(e) Dividends payable on shares of this Series for any period other than a
full dividend period shall be computed on the basis of a 360-day year consisting
of twelve  30-day  months.  Any  Dividend  payment made on shares of this Series
shall first be credited  against the earliest  accumulated but unpaid  Dividends
due with respect to the shares of this Series.

     "(f) No dividends shall be declared or paid or set aside for payment on any
share capital of the Corporation  ranking, as to dividends,  on a parity with or
subordinate to the shares of this Series for any period unless full  accumulated
Dividends have been or contemporaneously are declared and paid or declared and a
sum sufficient for the payment  thereof set aside for such payment on the shares
of this Series for all Dividend  periods  terminating on or prior to the date of
payment of such dividends.  When Dividends are not paid in full on the shares of
this  Series and any other  preferred  shares of the  Corporation  ranking  with
respect to payment of dividends on a parity with the shares of this Series,  all
dividends  declared or paid upon shares of this Series and such other  preferred
shares  shall be  declared  and paid pro rata so that the  amount  of  dividends
declared and paid on the shares of this Series and such other  preferred  shares
shall in all cases bear to each other the same ratio that accumulated  dividends
per share (which in the case of noncumulative preferred shares shall not include
any accumulation in respect of unpaid  dividends for prior dividend  periods) on
shares of this Series and such other preferred shares bear to each other. Except
as provided in the preceding  sentence,  unless full accumulated  Dividends have
been paid or declared and a sum sufficient for the payment thereof set aside for
payment,  no dividends  (other than  dividends or  distributions  paid in Common
Shares,  or options,  warrants  or rights to  subscribe  for or purchase  Common
Shares or, in each case, any other series of shares of the  Corporation  ranking
subordinate  to the shares of this Series as to dividends and upon  liquidation)
shall be declared and paid or a sum sufficient for the payment thereof set aside
for payment or any other distribution declared or made upon or in respect of the
Common Shares,  Series A Convertible  Shares or any other class of shares of the
Corporation ranking subordinate to or on a parity with the shares of this Series
as to dividends or upon  liquidation.  No Common  Shares,  Series A  Convertible
Shares  or  shares of any  other  class of  shares  of the  Corporation  ranking
subordinate  to or on a parity with the shares of this Series as to dividends or
upon liquidation shall be redeemed, purchased, retired or otherwise acquired for
any consideration (and no funds shall be paid to or made available for a sinking
fund for the redemption of any such share capital) by the Corporation (except by
conversion into or exchange for shares of the Corporation ranking subordinate to
the shares of this Series as to dividends and


                                       -4-

<PAGE>


upon  liquidation  or except with respect to Common Shares that the  Corporation
has  become  obligated  to redeem  prior to the  issuance  of any shares of this
Series upon the occurrence of specified circumstances) unless, in each case, the
full  accumulated  Dividends  in respect of this Series  shall have been paid or
declared  and a sum  sufficient  for the payment  thereof set aside for payment.
Holders of shares of this Series shall not be entitled to any dividend,  whether
payable in cash,  property  or stock,  in excess of the full  Dividends  on such
shares.

     "(g) Upon  conversion  of any shares of this  Series by any holder  thereof
pursuant to Section 7 hereof,  any Dividends  accrued and payable to such holder
shall be forfeited and the Corporation shall have no further  obligation to such
holder of shares of this Series for such accumulated Dividends.

     "3.  Liquidation  Rights.  (a) In the event of any voluntary or involuntary
dissolution, liquidation, or winding up of the affairs of the Corporation, after
payment  or  provision  for  payment of the debts and other  liabilities  of the
Corporation and any  preferential  amounts payable with respect to securities of
the Corporation  ranking prior to the shares of this Series  ("Senior  Preferred
Shares"),  the holders of each share of this Series shall be entitled to receive
out of the assets of the Corporation available for distribution to shareholders,
before  any  distribution  of  assets is made to  holders  of  Junior  Stock,  a
liquidating distribution in an amount equal to the Conversion Rate multiplied by
the greater of (i) the Conversion  Price per share of this Series plus an amount
equal to any accrued and unpaid  Dividends,  whether or not declared  (including
accumulated  Dividends),  to and including the date of  distribution or (ii) the
per share  amount  distributable  to the  holders of shares of this Series as if
such  holders had  converted  their  shares of this  Series  into Common  Shares
pursuant to Section 7 hereof immediately prior to such dissolution,  liquidation
or winding up of the affairs of the  Corporation  (plus  accumulated  Dividends,
whether or not declared). Amounts payable pursuant to clause (i) or (ii) of this
Section 3(a) shall be  distributed  ratably  among the holders of shares of this
Series in proportion to the number of shares of this Series held.  After payment
to the holders of shares of this Series of the full amount to which such holders
are entitled as set forth above, the holders of shares of this Series shall have
no right or claim to any of the remaining assets of the Corporation.

     "(b) If upon any such dissolution, liquidation or winding up of the affairs
of the  Corporation,  the  assets  of the  Corporation  distributable  among the
holders of shares of this Series and the holders of all other  classes or series
of shares of the Corporation ranking on a parity with the


                                       -5-

<PAGE>


shares of this Series shall be insufficient to permit the payment to them of the
full preferential amounts to which they are entitled,  then the entire assets of
the  Corporation  so to be distributed  shall be  distributed  ratably among the
holders of shares of this  Series and such other  classes or series of shares of
the  Corporation in proportion to the sum of the  accumulated  dividends and the
liquidation preferences per share.

     "(c)  The  sale,   conveyance,   mortgage,   pledge  or  lease  of  all  or
substantially  all  the  assets  of the  Corporation  shall  be  deemed  to be a
liquidation,  dissolution or winding up of the  Corporation for purposes of this
Section 3.

     "4. Optional Redemption.  (a) The shares of this Series may not be redeemed
before the fifth  anniversary  of the Initial  Issuance Date.  Thereafter,  each
share of this Series shall be redeemable  (subject to subsection  4(d) below) at
the option of the  Corporation,  in whole or in part, at the  redemption  price,
which shall be an amount equal to the Conversion  Rate multiplied by the greater
of (i) the  Conversion  Price per share of this  Series  plus the  amount of any
accrued and unpaid  Dividends  per share of this Series  (including  accumulated
Dividends, whether or not declared), or (ii) the Fair Market Value of a share of
this Series (as defined below). For purposes hereof, the Fair Market Value shall
be determined by a nationally  recognized  independent  investment  banking firm
mutually agreed to by the Corporation and the holder of a majority of the shares
of this Series then outstanding, whose determination shall be conclusive.

     "(b) (i) In case the  Corporation  shall  desire to  exercise  its right to
redeem any shares of this  Series,  it shall give notice of such  redemption  to
holders of the shares of this Series to be redeemed as  hereinafter  provided in
this Section 4(b).

          "(ii) Notice of redemption  shall be given to the holders of shares of
     this Series to be redeemed by mailing  such notice by  first-class  mail to
     their last  addresses as they shall appear upon the register for the shares
     of this Series not less than 120 calendar  days prior to the date fixed for
     redemption.

          "(iii) Each such notice of redemption (A) shall specify the date fixed
     for redemption and the redemption  price at which shares of this Series are
     to be redeemed,  (B) shall state that payment of the  redemption  price for
     the  shares of this  Series to be  redeemed  will be made at the  principal
     executive  offices of the Corporation,  upon  presentation and surrender of
     certificates  representing such shares of this Series, and (C) if less than
     all the shares of


                                       -6-

<PAGE>


     this Series are to be redeemed,  shall specify the number of shares of this
     Series  held  by each  holder  to be  redeemed.  In  case  any  certificate
     representing  shares of this  Series is to be  redeemed  in part only,  the
     notice of  redemption  which  relates to such  certificate  shall state the
     number of shares  of this  Series  represented  by such  certificate  to be
     redeemed  and  shall  state  that on and after the  redemption  date,  upon
     surrender of such  certificate,  a new certificate or certificates  for the
     number of shares of this Series  equal to the  unredeemed  portion  thereof
     will be issued.

          "(iv) If less than all the shares of this  Series are to be  redeemed,
     the  Corporation  shall effect such  redemption  pro rata among the holders
     thereof  (based on the number of shares of this  Series held on the date of
     notice of redemption).

     "(c) (i) If the giving of notice of redemption shall have been completed as
provided above,  the shares of this Series specified in such notice shall become
redeemable,  and shall be  redeemed by the  Corporation  upon  presentation  and
surrender of the certificate  representing  such shares,  on the date and at the
place stated in such notice at the redemption  price, and on and after such date
fixed for  redemption,  notwithstanding  that any certificate for shares of this
Series  so  called  for  redemption   shall  not  have  been   surrendered   for
cancellation,  unless  there  shall  have  been  a  default  in  payment  of the
redemption  price,  all shares of this  Series  called for  redemption  shall no
longer be deemed to be  outstanding,  and all rights with respect to such shares
of this Series shall forthwith cease and terminate  except only the right of the
holders thereof to receive from the Corporation  the redemption  price,  without
interest, of the shares to be redeemed,  and such shares shall not thereafter be
transferred on the books of the  Corporation or be deemed to be outstanding  for
any purpose whatsoever.

          "(ii) Upon presentation of any certificate representing shares of this
     Series only a portion of which are to be redeemed,  the  Corporation  shall
     immediately  issue,  at its  expense,  a new  certificate  or  certificates
     representing the shares of this Series not redeemed.

     "(d) Except as provided in paragraph (a) above, the Corporation  shall have
no right to redeem  the  shares of this  Series.  Any  shares of this  Series so
redeemed shall be permanently retired, shall no longer be deemed outstanding and
shall not under any circumstances be reissued, and the Corporation may from time
to time take such appropriate corporate action as may be necessary to reduce the
authorized  shares of this Series  accordingly.  Nothing herein  contained shall
prevent or restrict the purchase by


                                       -7-

<PAGE>


the  Corporation,  from time to time  either at public or private  sale,  of the
whole or any part of the  shares of this  Series at such  price or prices as the
Corporation may determine, subject to the provisions of applicable law.

     "5. No Mandatory Redemption. The shares of this Series shall not be subject
to mandatory redemption by the Corporation.

     "6. Voting  Rights.  (a) Each issued and  outstanding  share of this Series
shall be  entitled  to the  number  of votes  equal to the  Conversion  Rate (as
adjusted from time to time pursuant to Section 7(a) hereof),  at each meeting of
shareholders of the Corporation with respect to any and all matters presented to
the shareholders of the Corporation for their action or consideration. Except as
provided by law, by the  provisions of paragraph (b) below or by the  provisions
establishing the terms of any other class of preferred stock of the Corporation,
holders of the  shares of this  Series  and of any other  outstanding  preferred
stock,  including without limitation the Series A Convertible Shares, shall vote
together with the holders of Common Shares as a single class.

     (b) In addition to any other rights provided by law, the Corporation  shall
not amend,  alter or repeal the  preferences,  special rights or other powers of
the shares of this Series or any other provision of the Corporation's constating
documents that would adversely affect the rights of the holders of the shares of
this Series, including, without limitation, any increase in the number of shares
of this Series,  without the written consent or affirmative  vote of the holders
of at least 66-2/3% of the then  outstanding  aggregate number of such adversely
affected  shares  of this  Series,  given in  writing  or by vote at a  meeting,
consenting  or  voting  (as the case  may be)  separately  as a class.  For this
purpose,  the  authorization or issuance of any series of preferred stock of the
Corporation  with  preference  or priority  over,  or being on a parity with the
shares of this  Series as to the right to receive  either  dividends  or amounts
distributable  upon  liquidation,  dissolution or winding up of the  Corporation
shall be deemed to adversely affect the shares of this Series.

     "7.  Conversion.  (a) (i) Each share of this Series may be converted at any
time, at the option of the holder thereof,  in the manner hereinafter  provided,
into fully-paid and nonassessable Common Shares, provided,  however, that on any
redemption of any shares of this Series or any  liquidation of the  Corporation,
the right of  conversion  shall  terminate  at the close of business on the full
business  day next  preceding  the date  fixed  for such  redemption  or for the
payment of any amounts distributable on liquidation to the holders of the shares
of this Series.


                                       -8-

<PAGE>


The  number of Common  Shares of the  Corporation  into which each share of this
Series is convertible (the "Conversion Rate") shall equal, for each one share of
this  Series,  such number of Common  Shares equal to (I)(A) the sum of (1) U.S.
$10,000,000  plus (2) the sum of any  Adjustment  Amounts for any fiscal periods
preceding the last completed fiscal period (the sum of the amounts in (A)(1) and
(A)(2),  the "Base Factor") plus (B) the Adjustment Amount, if any, for the last
completed fiscal period, divided by (II) the conversion price for shares of this
Series  (the  "Conversion  Price"),  divided  by (III)  2,500,000.  The  initial
Conversion  Rate  shall be one  Common  Share for each one share of this  Series
surrendered  for  conversion,  representing  an  initial  Conversion  Price (for
purposes of Section 7(g)) of U.S.  $4.00 per share of the  Corporation's  Common
Shares. The applicable Conversion Rate and Conversion Price from time to time in
effect are subject to adjustment as hereinafter provided.

     (ii) For  purposes  hereof,  the term  "Adjustment  Amount"  shall mean (a)
$800,000 as of October 31,  2000,  (b) two percent  (2.0%) of the Base Factor in
effect at such time, for any adjustment  occurring from November 1, 2000 through
October 31, 2004;  (c) three percent (3.0%) of the Base Factor in effect at such
time,  for any adjustment  occurring  from November 1, 2004 through  October 31,
2005; (d) three and three-quarters  percent (3.75%) of the Base Factor in effect
at such time, for any adjustment occurring from November 1, 2005 through October
31, 2006; and (e) four and one-half  percent (4.5%) of the Base Factor in effect
at such time,  for any  adjustment  occurring  from and after  November 1, 2006;
provided,  however,  that in the event that EBTA per Fully Diluted  Common Share
for the fiscal year ended July 31, 2000 is greater  than or equal to U.S.  $0.20
(excluding  CFO Costs),  then the  Adjustment  Amount for all purposes  shall be
zero; and provided, further, that in the event the EBTA per Fully Diluted Common
Share for the fiscal year ended July 31, 2000 is less than U.S. $0.20 (excluding
CFO Costs) and the Corporation  meets the quarterly EBTA targets set forth below
for four (4) consecutive fiscal quarters thereafter, the Adjustment Amount shall
be zero in respect of any fiscal  quarter ended on or after the last day of such
fourth  consecutive  fiscal  quarter.  For purposes of  paragraph  (i) above and
clauses  (b)-(e)  of  this  paragraph  (ii),  the  Adjustment  Amount  shall  be
determined  and the  Conversion  Rate  shall be  adjusted  as of the end of each
fiscal  quarter.  Any  conversion  of shares of this Series shall be made at the
Conversion Rate in effect as of the end of the fiscal quarter ended  immediately
prior to the date of such conversion.


                                       -9-

<PAGE>


                                       Target EBTA per Fully Diluted
Period                                 Common Share
- ------                                 ------------------------------
Fiscal quarter ending 10/31/99         U.S. $0.02
Fiscal quarter ending 1/31/00                0.03
Fiscal quarter ending 4/30/00                0.07
Fiscal quarter ending 7/31/00                0.08
Fiscal quarter ending 10/31/00               0.07
Fiscal quarter ending 1/31/01                0.10
Fiscal quarter ending 4/30/01                0.15
Fiscal quarter ending 7/31/01                0.17
Fiscal quarter ending 10/31/01               0.16
Fiscal quarter ending 1/31/02                0.20
Fiscal quarter ending 4/30/02                0.26
Fiscal quarter ending 7/31/02                0.30


     (iii) As of October 31, 2000, the  Conversion  Price will be reduced by the
Per Share Valuation  Adjustment,  if any. "Per Share Valuation Adjustment" means
the  Valuation  Adjustment  divided by the sum of (i) the total number of issued
and  outstanding  Common  Shares as of  September  30,  1999 plus (ii) the total
number of Shares  into  which the  outstanding  Series A  Convertible  Preferred
Shares  are  convertible  plus (iii) the total  number of Shares  into which the
outstanding convertible notes of the Corporation are convertible as of September
30, 1999 plus (iv) the total number of Shares into which the outstanding  shares
of this Series are  convertible as of October 31, 2000.  "Valuation  Adjustment"
means the Reserve Deficiency  multiplied by a factor of 7. "Reserve  Deficiency"
means the amount,  if any, by which $4,736,000  exceeds the amounts collected by
the  Corporation on or before July 31, 2000 for services  performed on or before
July 31, 1999. No later than October 31, 2000,  the Chief  Financial  Officer of
the Corporation shall certify as to the Reserve Deficiency to each record holder
of shares of this Series.  At the request of any record  holder of the shares of
this Series,  the Corporation shall cause the Reserve  Deficiency to be verified
by an  audit  performed  by  an  internationally-recognized  independent  public
accounting firm.

     "(b) Whenever the Conversion Price or the Conversion Rate shall be adjusted
as provided in Section  7(a)(i) or Section 7(g) hereof,  the  Corporation  shall
forthwith file at


                                      -10-

<PAGE>


each  office  designated  for the  conversion  of the shares of this  Series,  a
statement,  signed by any of the Chairman of the Board, the President,  any Vice
President or the Treasurer of the Corporation,  showing in reasonable detail the
facts  requiring  such  adjustment.  The  Corporation  shall also cause a notice
setting  forth any such  adjustments  to be sent by mail,  first class,  postage
prepaid,  to each  record  holder of shares of this Series at his or its address
appearing  on the  stock  register.  If such  notice  relates  to an  adjustment
resulting from an event referred to in paragraph 7(g)(vii), such notice shall be
included  as part of the notice  required to be mailed and  published  under the
provisions of paragraph 7(g)(vii) hereof.

     "(c) The  right of  conversion  shall be  exercised  by the  holder  by the
surrender of the certificates representing shares of this Series to be converted
to the  Corporation  at any time during normal  business  hours at the office or
agency then  maintained  by it for the  conversion of shares of this Series (the
"Conversion  Office"),  accompanied by written notice to the Corporation of such
holder's  election to convert  and, if so  required  by the  Corporation  or any
conversion  agent,  by an instrument of transfer,  in form  satisfactory  to the
Corporation and to any conversion  agent, duly executed by the registered holder
or by such holder's duly authorized  attorney,  and transfer tax stamps or funds
therefor, if required pursuant to Section 7(k).

     "(d) As promptly as  practicable  after the surrender for conversion of one
or more  certificates  representing  any  shares of this  Series  in the  manner
provided in Section  7(c) and the payment in cash of any amount  required by the
provisions  of  Section  7(k),  the  Corporation  will  deliver  or  cause to be
delivered at the Conversion Office to or upon the written order of the holder of
such shares,  a  certificate  or  certificates  representing  the number of full
Common  Shares  issuable upon such  conversion,  issued in such name or names as
such holder may direct, subject to any applicable  contractual  restrictions and
any restrictions imposed by applicable securities laws. Such conversion shall be
deemed to have been made immediately  prior to the close of business on the date
of such surrender of certificates  representing  shares of this Series in proper
order for conversion, and all rights of the holder of such shares as a holder of
such shares shall cease at such time, and the person or persons in whose name or
names the  certificates for such Common Shares are to be issued shall be treated
for all purposes as having become the record  holder or holders  thereof at such
time;  provided,  however,  that any such  surrender  on any date when the stock
transfer books of the Corporation shall be closed shall constitute the person or
persons in whose name or names the certificates for such Common Shares are to be
issued as the record holder or holders thereof for all purposes


                                      -11-

<PAGE>


immediately  prior to the close of business on the next  succeeding day on which
such stock transfer books are opened.

     "(e) Upon  conversion  in the manner  provided in this  Section 7 of only a
portion of the number of shares of this Series  represented  by a certificate so
surrendered for conversion,  the Corporation shall issue and deliver or cause to
be delivered at the Conversion Office to or upon the written order of the holder
of  the  certificate  so  surrendered  for  conversion,  at the  expense  of the
Corporation, a new certificate or certificates representing the number of shares
of this  Series  representing  the  unconverted  portion of the  certificate  so
surrendered,  issued in such name or names as such holder may direct, subject to
any  applicable  contractual   restrictions  and  any  restrictions  imposed  by
applicable securities laws.

     "(f) All  shares of this  Series  which  shall  have been  surrendered  for
conversion as herein  provided shall no longer be deemed to be  outstanding  and
all rights with respect to such shares, including the rights, if any, to receive
notices and to vote,  shall forthwith cease and terminate  except only the right
of the holder thereof to receive Common Shares in exchange therefor.  Any shares
of this  Series so  converted  shall be retired  and  canceled  and shall not be
reissued, and the Corporation may from time to time take such appropriate action
as may be necessary to reduce the authorized shares of this Series accordingly.

     "(g) Anti-Dilution Provisions.

          (i) In order to prevent dilution of the right granted  hereunder,  the
     Conversion  Price  shall be  subject  to  adjustment  from  time to time in
     accordance  with this paragraph  7(g)(i).  At any given time the Conversion
     Price  shall be that  dollar (or part of a dollar)  amount  the  payment of
     which shall be  sufficient at the given time to acquire one Common Share of
     the  Corporation  upon  conversion  of  shares  of this  Series.  Upon each
     adjustment  of the  Conversion  Price  pursuant to this Section  7(g),  the
     registered  holder of shares of this Series shall thereafter be entitled to
     acquire  upon  exercise,  at  the  Conversion  Price  resulting  from  such
     adjustment,  the number of Common Shares of the  Corporation  obtainable by
     multiplying  the  Conversion  Price  in  effect  immediately  prior to such
     adjustment  by the  number of shares  of Common  Shares of the  Corporation
     acquirable  immediately  prior to such  adjustment and dividing the product
     thereof by the  Conversion  Price  resulting  from such a  adjustment.  For
     purposes of this Section  7(g),  the term "Number of Common  Shares  Deemed
     Outstanding"  at any given  time  shall  mean the sum of (x) the  number of
     shares of the Corporation's Common Shares outstanding at such time, (y) the
     number of Common Shares of the Corporation  issuable assuming conversion at
     such time of all outstanding  shares of the  Corporation's  other series of
     convertible preferred


                                      -12-

<PAGE>


     stock,  if any,  and (z) the  number  of Common  Shares of the  Corporation
     deemed to be  outstanding at such time under  subparagraphs  7(g)(ii)(1) to
     (8), inclusive. For all purposes hereof, the term "Market Price," as to the
     Common  Shares as of any  specified  date,  shall  mean:  (i) if the Common
     Shares are listed or  admitted  for  trading on one or more  United  States
     national  securities  exchanges,  the daily  closing  price for the  Common
     Shares on the  principal  exchange in the United States on which the Common
     Shares are listed; (ii) if the Common Shares are not listed or admitted for
     trading  on any  United  States  national  securities  exchange,  the daily
     closing  price for the  Common  Shares  on the  Nasdaq  National  or Nasdaq
     Small-Cap Market  ("Nasdaq");  (iii) if the Common Shares are not listed or
     admitted for trading on a United States national  securities exchange or on
     Nasdaq, the daily closing price of the Common Shares on the principal stock
     exchange  in Canada on which the Common  Shares are  listed  (expressed  in
     United States  dollars based upon the noon buying rate in New York City for
     cable  transfers in Canadian  dollars as certified for customs  purposes by
     the Federal  Reserve Bank of New York);  (iv) if the Common  Shares are not
     listed or  admitted  to trading on any United  States  national or Canadian
     national  securities exchange or on Nasdaq, the average of the reported bid
     and  asked  prices  on  the  trading  day   preceding   such  date  in  the
     over-the-counter  market as  furnished by the  National  Quotation  Bureau,
     Inc.,  or, if such firm is not then  engaged in the  business of  reporting
     such prices,  as furnished  by any member of the  National  Association  of
     Securities Dealers, Inc. selected by the Corporation;  or (v) if the Common
     Shares are not publicly traded,  the Market Price for such day shall be the
     fair market value thereof  determined  jointly by the  Corporation  and the
     holder  of a  majority  of the  shares  of this  Series  then  outstanding;
     provided,  however,  that if such  parties  are  unable to reach  agreement
     within a reasonable period of time, the Market Price shall be determined in
     good faith by the independent  investment  banking firm selected jointly by
     the  Corporation  and the holder of a majority of the shares of this Series
     then  outstanding or, if that selection cannot be made within an additional
     15 days, by an independent investment banking firm selected by the American
     Arbitration Association in accordance with its rules.

          (ii) Except as provided in paragraph  7(g)(iii) or 7(g)(vi)  below, if
     and whenever on or after the Initial  Issuance Date, the Corporation  shall
     issue or sell, or shall in accordance  with  subparagraphs  7(g)(ii)(1)  to
     (8),  inclusive,  be deemed to have issued or sold (such  issuance or sale,
     whether actual or deemed,  the "Triggering  Transaction") any Common Shares
     for a consideration per share less than,

               (I) (if the  Common  Shares  are not traded on the New York Stock
          Exchange,  the American Stock Exchange or the Nasdaq National  Market)
          the Conversion Price in effect  immediately  prior to the time of such
          issuance or sale, then forthwith upon such Triggering  Transaction the
          Conversion


                                      -13-

<PAGE>


          Price  shall,  subject  to  subparagraphs  (1) to (8) of this  Section
          7(g)(ii),  be  reduced  to the  Conversion  Price  (calculated  to the
          nearest tenth of a cent)  determined by dividing:  (i) an amount equal
          to the sum of (x) the  product  derived by  multiplying  the Number of
          Common Shares Deemed Outstanding  immediately prior to such Triggering
          Transaction  by the  Conversion  Price  then in  effect,  plus (y) the
          consideration,  if any,  received by the Corporation upon consummation
          of such Triggering  Transaction,  by (H) an amount equal to the sum of
          (x) the Number of Common Shares Deemed  Outstanding  immediately prior
          to such  Triggering  Transaction  plus (y) the number of Common Shares
          issued  (or  deemed  to be  issued in  accordance  with  subparagraphs
          7(g)(ii)(l) to (8)) in connection with the Triggering Transaction; or

               (II) (if the  Common  Shares  are  traded  on the New York  Stock
          Exchange,  the American Stock Exchange or the Nasdaq National  Market)
          the  average  Market  Price  for  the  ten  trading  days  immediately
          preceding such issuance or sale,  then forthwith upon such  Triggering
          Transaction,  the Conversion Price shall, subject to subparagraphs (1)
          to (8) of this Section  7(g)(ii),  be reduced to the Conversion  Price
          (calculated to the nearest tenth of a cent)  determined by multiplying
          the Conversion Price in effect  immediately  prior to the time of such
          Triggering  Transaction by a fraction, the numerator of which shall be
          the  sum of  (x)  the  Number  of  Common  Shares  Deemed  Outstanding
          immediately prior to such Triggering Transaction and (y) the number of
          Common  Shares  which  the  aggregate  consideration  received  by the
          Corporation  upon such  Triggering  Transaction  would purchase at the
          average  Market Price for the ten trading days  immediately  preceding
          such Triggering Transaction, and the denominator of which shall be the
          Number of Common  Shares  Deemed  Outstanding  immediately  after such
          Triggering Transaction.

     For  purposes  of  determining  the  adjusted  Conversion  Price under this
paragraph 7(g)(ii),  the following  subsections (1) to (8), inclusive,  shall be
applicable:

          (1) In case the  Corporation  at any time  shall in any  manner  grant
     (whether  directly or by assumption in an  amalgamation  or otherwise)  any
     rights to subscribe for or to purchase, or any options for the purchase of,
     Common  Shares  or any  stock  or  other  securities  convertible  into  or
     exchangeable  for Common Shares (such rights or options being herein called
     "Options" and such  convertible or exchangeable  stock or securities  being
     herein called "Convertible Securities"), whether or not such Options or the
     right  to  convert  or  exchange  any  such   Convertible   Securities  are
     immediately  exercisable,  and the price  per  share  for which the  Common
     Shares are issuable upon exercise,


                                      -14-

<PAGE>


     conversion or exchange  (determined  by dividing (x) the total  amount,  if
     any,  received or receivable by the  Corporation as  consideration  for the
     granting  of  such  Options,   plus  the  aggregate  amount  of  additional
     consideration  payable to the  Corporation  upon the  exercise  of all such
     Options,  plus,  in the case of such Options  which  relate to  Convertible
     Securities,  the  aggregate  amount of  additional  consideration,  if any,
     payable upon the issue or sale of such Convertible  Securities and upon the
     conversion or exchange  thereof,  by (y) the total maximum number of Common
     Shares  issuable  upon the  exercise of such Options or the  conversion  or
     exchange  of such  Convertible  Securities)  shall be less than the average
     Market  Price in effect for the ten trading days  immediately  prior to the
     time of the  granting of such  Options (if the Common  Shares are traded on
     the New York Stock  Exchange,  the  American  Stock  Exchange or the Nasdaq
     National Market) or the Conversion Price in effect immediately prior to the
     time of the granting of such  Options (if the Common  Shares are not traded
     on the New York Stock  Exchange,  the American Stock Exchange or the Nasdaq
     National  Market),  then the total maximum number of Common Shares issuable
     upon  the  exercise  of  such  Options  or,  in the  case  of  Options  for
     Convertible Securities, upon the conversion or exchange of such Convertible
     Securities, shall (as of the date of granting of such Options) be deemed to
     be outstanding and to have been issued and sold by the Corporation for such
     price per share.  No adjustment of the Conversion  Price shall be made upon
     the actual  issuance of such Common Shares or such  Convertible  Securities
     upon  the  exercise  of such  Options,  except  as  otherwise  provided  in
     subparagraph (3) below.

          (2) In case the  Corporation  at any time  shall in any  manner  issue
     (whether directly or by assumption in an amalgamation or otherwise) or sell
     any  Convertible  Securities,  whether  or not the  rights to  exchange  or
     convert thereunder are immediately exercisable, and the price per share for
     which  Common  Shares  are  issuable  upon  such   conversion  or  exchange
     (determined by dividing (x) the total amount  received or receivable by the
     Corporation  as  consideration  for the  issue or sale of such  Convertible
     Securities, plus the aggregate amount of additional consideration,  if any,
     payable to the Corporation upon the conversion or exchange thereof,  by (y)
     the total maximum  number of Common Shares  issuable upon the conversion or
     exchange of all such Convertible Securities) shall be less than the average
     Market  Price in effect for the ten trading days  immediately  prior to the
     time of such issue or sale (if the Common Shares are traded on the New York
     Stock Exchange, the American Stock Exchange or the Nasdaq


                                      -15-

<PAGE>


     National Market) or the Conversion Price in effect immediately prior to the
     time of such issue or sale (if the Common  Shares are not traded on the New
     York Stock  Exchange,  the American Stock  Exchange or the Nasdaq  National
     Market),  then the total  maximum  number of Common  Shares  issuable  upon
     conversion or exchange of all such Convertible  Securities shall (as of the
     date of the issue or sale of such  Convertible  Securities) be deemed to be
     outstanding  and to have been issued and sold by the  Corporation  for such
     price per share.  No adjustment of the Conversion  Price shall be made upon
     the actual  issuance of such Common  Shares upon  exercise of the rights to
     exchange or convert under such Convertible Securities,  except as otherwise
     provided in subparagraph (3) below.

          (3) If the purchase price  provided for in any Options  referred to in
     subparagraph  (1), the additional  consideration,  if any, payable upon the
     conversion  or  exchange  of  any  Convertible  Securities  referred  to in
     subparagraphs  (1) or (2), or the rate at which any Convertible  Securities
     referred to in subparagraph (1) or (2) are convertible into or exchangeable
     for Common  Shares  shall change at any time (other than under or by reason
     of provisions designed to protect against dilution of the type set forth in
     paragraphs  7(g)(ii) or 7(g)(iv)),  the  Conversion  Price in effect at the
     time of such change shall  forthwith be readjusted to the Conversion  Price
     which  would  have  been in  effect  at  such  time  had  such  Options  or
     Convertible Securities still outstanding provided for such changed purchase
     price,  additional  consideration  or rate, as the case may be, at the time
     initially  granted,  issued or sold. If the purchase  price provided for in
     any Option referred to in subparagraph (1) or the additional consideration,
     if  any,  payable  upon  the  conversion  or  exchange  of any  Convertible
     Securities  referred to in  subparagraphs  (1) or (2), or the rate at which
     any  Convertible  Securities  referred to in  subparagraphs  (1) or (2) are
     convertible into or exchangeable for Common Shares, shall be reduced at any
     time under or by reason of  provisions  with  respect  thereto  designed to
     protect  against  dilution,  then in case of the delivery of Common  Shares
     upon the exercise of any such Option or upon  conversion or exchange of any
     such  Convertible  Security,  the Conversion Price then in effect hereunder
     shall  forthwith be adjusted to such  respective  amount as would have been
     obtained had such Option or  Convertible  Security  never been issued as to
     such Common Shares and had  adjustments  been made upon the issuance of the
     Common  Shares  delivered  as  aforesaid,  but only if as a result  of such
     adjustment the Conversion Price then in effect hereunder is hereby reduced.


                                      -16-

<PAGE>


          (4) On the expiration of any Option or the termination of any right to
     convert or exchange any Convertible  Securities,  the Conversion Price then
     in effect  hereunder shall  forthwith be increased to the Conversion  Price
     which  would  have  been  in  effect  at the  time of  such  expiration  or
     termination  had such  Option  or  Convertible  Securities,  to the  extent
     outstanding immediately prior to such expiration or termination, never been
     issued.

          (5) In case any Options shall be issued in  connection  with the issue
     or sale of other  securities of the  Corporation,  together  comprising one
     integral  transaction  in which no specific  consideration  is allocated to
     such Options by the parties  thereto,  such Options shall be deemed to have
     been issued without consideration.

          (6) In case any Common Shares, Options or Convertible Securities shall
     be  issued or sold or  deemed  to have  been  issued or sold for cash,  the
     consideration  received  therefor shall be deemed to be the amount received
     by the Corporation therefor (before deduction for expenses or underwriters'
     discounts or commissions related to such issue or sale). In case any Common
     Shares,  Options or  Convertible  Securities  shall be issued or sold for a
     consideration  other than cash, the amount of the consideration  other than
     cash  received  by  the  Corporation  shall  be  the  fair  value  of  such
     consideration  as determined in good faith by the Board of Directors of the
     Corporation.

          (7) In case the Corporation shall declare a dividend or make any other
     distribution  upon the share capital of the  Corporation  payable in Common
     Shares,  Options, or Convertible  Securities,  then in such case any Common
     Shares, Options or Convertible Securities,  as the case may be, issuable in
     payment  of such  dividend  or  distribution  shall be  deemed to have been
     issued or sold without consideration.

          (8) For purposes of this paragraph  7(g)(ii),  in case the Corporation
     shall take a record of the holders of its Common  Shares for the purpose of
     entitling them (x) to receive a dividend or other  distribution  payable in
     Common Shares,  Options or in Convertible  Securities,  or (y) to subscribe
     for or purchase Common Shares, Options or Convertible Securities, then such
     record  date  shall be  deemed  to be the date of the  issue or sale of the
     Common  Shares deemed to have been issued or sold upon the  declaration  of
     such dividend or the making of such other  distribution  or the date of the
     granting of such right or subscription or purchase, as the case may be.


                                      -17-

<PAGE>


     (iii) In the event the Corporation shall declare a dividend upon the Common
Shares (other than a dividend  payable in Common Shares covered by  subparagraph
7(g)(ii)(7))   payable  otherwise  than  out  of  earnings  or  earned  surplus,
determined in accordance with U.S.  generally  accepted  accounting  principles,
including the making of appropriate  deductions for minority interests,  if any,
in subsidiaries (herein referred to as "Liquidating  Dividends"),  then, as soon
as possible after the conversion of any shares of this Series,  the  Corporation
shall,  subject to applicable  law, pay to the person  converting such shares of
this Series an amount equal to the aggregate  value at the time of such exercise
of all  Liquidating  Dividends  (including  but not limited to the Common Shares
which would have been issued at the time of such earlier  exercise and all other
securities  which would have been issued with  respect to such Common  Shares by
reason of stock splits,  stock dividends,  amalgamations or reorganizations,  or
for any other reason). For the purposes of this paragraph 7(g)(iii),  a dividend
other than in cash shall be considered payable out of earnings or earned surplus
only to the extent that such  earnings  or earned  surplus are charged an amount
equal to the fair  value of such  dividend  as  determined  in good faith by the
Board.

     (iv) In case the  Corporation  shall at any time  subdivide  (other than by
means of a dividend  payable in Common Shares covered by paragraph  7(g)(ii)(7))
its  outstanding  Common Shares into a greater number of shares,  the Conversion
Price in effect  immediately prior to such subdivision shall be  proportionately
reduced,  and,  conversely,  in  case  the  outstanding  Common  Shares  of  the
Corporation  shall be combined into a smaller  number of shares,  the Conversion
Price in effect  immediately prior to such combination shall be  proportionately
increased.

     (v) If any capital  reorganization or reclassification of the share capital
of the Corporation, or amalgamation of the Corporation with another corporation,
or the sale of all or  substantially  all of its assets to  another  corporation
shall be effected in such a way that holders of Common  Shares shall be entitled
to receive  stock,  securities,  cash or other  property  with  respect to or in
exchange  for  Common  Shares,  then,  as a  condition  of such  reorganization,
reclassification,  amalgamation or sale, lawful and adequate  provision shall be
made  whereby  the  holders  of shares of this  Series  shall  have the right to
acquire and receive upon  conversion  of the shares of this Series,  which right
shall be prior to the  rights of the  holders  of Junior  Stock  (but  after and
subject  to the  rights of holders of Senior  Preferred  Shares,  if any),  such
shares of stock, securities, cash or other property issuable or payable (as part
of the reorganization,  reclassification,  amalgamation or sale) with respect to
or in exchange for such number of outstanding  Common Shares of the  Corporation
as would have been received upon  conversion of the shares of this Series at the
Conversion  Price  then in  effect.  The  Corporation  will not  effect any such
amalgamation or sale, unless prior to the consummation thereof


                                      -18-

<PAGE>


the  amalgamated  corporation or the  corporation  purchasing  such assets shall
assume by written instrument mailed or delivered to the holders of the shares of
this Series at the last  address of each such holder  appearing  on the books of
the  Corporation,  the  obligation to deliver to each such holder such shares of
stock,  securities  or assets as, in accordance  with the foregoing  provisions,
such holder may be entitled to receive. If a purchase,  tender or exchange offer
is made to and  accepted  by the  holders  of more  than 50% of the  outstanding
Common  Shares  of  the  Corporation,  the  Corporation  shall  not  effect  any
amalgamation  or sale  with  the  person  having  made  such  offer  or with any
Affiliate (as defined below) of such person, unless prior to the consummation of
such  amalgamation  or sale the holders of the shares of this Series  shall have
been given a reasonable opportunity to then elect to receive upon the conversion
of the  shares of this  Series  either  the  stock,  securities  or assets  then
issuable  with  respect to the Common  Shares of the  Corporation  or the stock,
securities  or assets,  or the  equivalent,  issued to  previous  holders of the
Common  Shares in  accordance  with such offer.  For purposes  hereof,  the term
"Affiliate" with respect to any given person shall mean any person  controlling,
controlled by or under common control with the given person.

     (vi) The  provisions  of this  Section  7(g)  shall not apply to any Common
Shares issued, issuable or deemed outstanding under subparagraphs 7(g)(ii)(1) to
(8) inclusive: (i) to any person pursuant to any stock option, stock purchase or
similar plan or arrangement  for the benefit of employees of the  Corporation or
its subsidiaries in effect on the Initial Issuance Date or thereafter adopted by
the Board of Directors of the  Corporation,  (ii) pursuant to options,  warrants
and  conversion  rights in existence on the Initial  Issuance  Date,  (iii) upon
exercise of the Warburg  Warrants  or (iv) on  conversion  of the shares of this
Series or the sale of any additional shares of this Series.

     (vii) In the event that:

          (1) the Corporation shall declare any cash dividend upon its Common
     Shares, or

          (2) the Corporation  shall declare any dividend upon its Common Shares
     payable in stock or make any special dividend or other  distribution to the
     holders of its Common Shares, or

          (3) the  Corporation  shall  offer  for  subscription  pro rata to the
     holders of its Common Shares any additional shares of stock of any class or
     other rights, or

          (4) there shall be any capital  reorganization or  reclassification of
     the  share  capital  of  the  Corporation,  including  any  subdivision  or
     combination of its outstanding


                                      -19-

<PAGE>


     Common Shares, or amalgamation of the Corporation with, or sale of all or
     substantially all of its assets to, another corporation, or

          (5) there shall be a voluntary or involuntary dissolution, liquidation
     or winding up of the Corporation;

then, in connection with such event,  the Corporation  shall give to the holders
of the shares of this Series:

          (A)  at least  twenty (20) days' prior  written  notice of the date on
               which the books of the Corporation  shall close or a record shall
               be taken for such dividend,  distribution or subscription  rights
               or for  determining  rights  to  vote  in  respect  of  any  such
               reorganization,     reclassification,     amalgamation,     sale,
               dissolution, liquidation or winding up; and

          (B)  in  the  case  of  any  such  reorganization,   reclassification,
               amalgamation,  sale,  dissolution,  liquidation or winding up, at
               least twenty (20) days' prior written notice of the date when the
               same shall take place.

Such notice in accordance with the foregoing  clause (A) shall also specify,  in
the case of any such dividend,  distribution or subscription rights, the date on
which the holders of Common Shares shall be entitled thereto, and such notice in
accordance  with the  foregoing  clause (B) shall also specify the date on which
the holders of Common  Shares shall be entitled to exchange  their Common Shares
for  securities  or  other  property   deliverable  upon  such   reorganization,
reclassification, amalgamation, sale, dissolution, liquidation or winding up, as
the case may be. Each such  written  notice  shall be given by first class mail,
postage  prepaid,  addressed  to the holders of the shares of this Series at the
last address of each such holder appearing on the books of the Corporation.

     (viii) If at any time or from time to time on or after the Initial Issuance
Date,  the  Corporation  shall  grant,  issue or sell any  Options,  Convertible
Securities or rights to purchase  property (the  "Purchase  Rights") pro rata to
the record  holders of the Common  Shares of the  Corporation  and such  grants,
issuances or sales do not result in an adjustment of the Conversion  Price under
paragraph  7(g)(ii)  hereof,  then each holder of shares of this Series shall be
entitled  to acquire  (within  thirty  (30) days after the later to occur of the
initial  exercise date of such Purchase  Rights or receipt by such holder of the
notice  concerning  Purchase Rights to which such holder shall be entitled under
paragraph  7(g)(vii))  and upon the terms  applicable  to such  Purchase  Rights
either:


                                      -20-

<PAGE>


          (A)  the aggregate Purchase Rights which such holder could have
               acquired if it had held the number of Common Shares acquirable
               upon conversion of shares of this Series immediately before the
               grant, issuance or sale of such Purchase Rights; provided that if
               any Purchase Rights were distributed to holders of Common Shares
               without the payment of additional consideration by such holders,
               corresponding Purchase Rights shall be distributed to the
               exercising holders of the shares of this Series as soon as
               possible after such exercise and it shall not be necessary for
               the exercising holder of the shares of this Series specifically
               to request delivery of such rights; or

          (B)  in the event that any such Purchase  Rights shall have expired or
               shall expire prior to the end of said thirty (30) day period, the
               number of Common  Shares or the  amount of  property  which  such
               holder  could have  acquired  upon such  exercise  at the time or
               times at which  the  Corporation  granted,  issued  or sold  such
               expired Purchase Rights.

     (ix) If any event  occurs as to which,  in the  opinion of the  Board,  the
provisions  of this  Section  7(g) are not  strictly  applicable  or if strictly
applicable  would not fairly  protect the rights of the holders of the shares of
this Series in  accordance  with the  essential  intent and  principles  of such
provisions,  then the Board shall make an adjustment in the  application of such
provisions,  in accordance with such essential  intent and principles,  so as to
protect such rights as aforesaid,  but in no event shall any adjustment have the
effect of increasing the Conversion  Price as otherwise  determined  pursuant to
any of the  provisions  of this Section 7(g) except in the case of a combination
of shares of a type  contemplated in paragraph  7(g)(iv) and then in no event to
an amount  larger than the  Conversion  Price as adjusted  pursuant to paragraph
7(g)(iv).

     "(h) No fractional Common Shares shall be issued upon the conversion of any
share or shares of this  Series.  If any  fractional  interest in a Common Share
would,  except for the provisions of this Section 7(h), be deliverable  upon the
conversion of any share or shares of this Series,  the Corporation shall in lieu
of delivering  the  fractional  Common Share  therefor  satisfy such  fractional
interest  by payment to the holder of such  surrendered  share or shares of this
Series of an amount in cash equal  (computed to the nearest cent) to the current
market value of such  fractional  interest,  computed on the basis of the Market
Price of the Common Shares on the date of such  conversion,  provided,  however,
that no amount shall be paid by the Corporation to such holder of less than U.S.
$5.00.


                                      -21-

<PAGE>


     "(i) The Corporation shall be entitled to effect the mandatory  conversion,
in whole or in part,  of the  shares  of this  Series  in  accordance  with this
Section 7 if all of the following conditions ("Mandatory Conversion Conditions")
have been satisfied as of the date of the notice described below:

     (a) the  Common  Shares  are  traded on the New York  Stock  Exchange,  the
American Stock Exchange or the Nasdaq  National Market at a Market Price greater
than U.S.  $8.00 per Common  Share on each of the 10  consecutive  trading  days
preceding such date; and (b) the  Corporation's  EBTA for the three  consecutive
fiscal  quarters  preceding  such  date,  as  reported  in or  derived  from the
Corporation's quarterly or annual reports filed with the Securities and Exchange
Commission,  shall have averaged at least U.S.  $0.35 per Fully  Diluted  Common
Share per fiscal  quarter.  All  references  to per share amounts or prices with
respect  to the  above  conditions  shall  be  appropriately  adjusted  for  any
subdivision, consolidation, or reclassification of the Common Shares.

     Upon such mandatory  conversion,  each share of this Series subject to such
conversion  shall  be  converted  into  Common  Shares  at  the  then  effective
Conversion  Price  for such  shares.  In case the  Corporation  shall  desire to
exercise  the right to  convert  all or, as the case may be,  any shares of this
Series in  accordance  with the right to do so, it shall  provide  notice to the
holders of the shares of this Series to be converted as hereinafter  provided in
this Section 7(i)."

     "(i) A notice of conversion shall be given to the holders of shares of this
Series to be converted by mailing by first-class mail to their last addresses as
they shall  appear upon the register for shares of this Series not less than 120
calendar days prior to the date fixed for conversion.

     "(ii) Each such notice of  conversion  (A) shall specify the date fixed for
conversion and the number of Common Shares  issuable to the holder of a share of
this Series upon such conversion,  (B) shall state the offices or agencies to be
maintained  by  the  Corporation  for  the  purpose  of  such  conversion,  upon
presentation  and  surrender  of such shares of this Series and (C) if less than
all the shares of this Series are to be  converted,  shall specify the number of
shares  of this  Series  held by each  holder,  and the  serial  numbers  of the
certificates  thereof,  to be converted.  In case any  certificate  representing
shares of this Series is to be converted in part only,  the notice of conversion
which  relates  to such  certificate  shall  state the  number of shares of this
Series  represented by such  certificate to be converted and shall state that on
and after  the  conversion  date,  upon  surrender  of such  certificate,  a new
certificate


                                      -22-

<PAGE>


or  certificates  for a number of shares of this Series equal to the unconverted
portion thereof will be issued.

     "(j) The Corporation  will at all times reserve and keep available,  solely
for the purposes of the issuance of Common Shares upon  conversion of the shares
of this Series,  the full number of Common  Shares as shall be issuable upon the
conversion of all such outstanding shares of this Series.

     The Corporation will endeavor to comply with all securities laws regulating
the offer and delivery of Common  Shares upon  conversion  of the shares of this
Series and,  that if any Common  Shares  required to be reserved for purposes of
conversion of the shares hereunder require  registration with or approval of any
governmental  authority under any U.S. (federal or state) or Canadian law or the
laws of any  province or territory  of Canada  before such Common  Shares may be
validly issued or delivered upon conversion, the Corporation will, in good faith
and as  expeditiously  as  possible,  endeavor  to secure such  registration  or
approval, as the case may be.

     "All Common  Shares which shall be issued upon  conversion of the shares of
this Series will upon issuance be fully paid and  nonassessable  and not subject
to preemptive rights.

     "(k) The issuance of  certificates  for Common  Shares upon  conversion  of
shares  of this  Series  shall be made  without  charge  for any  stamp or other
similar tax in respect of such issuance.  However, if any such certificate is to
be issued  in a name  other  than  that of the  holder of record of the share or
shares  of this  Series  so  converted,  the  holder  thereof  shall  pay to the
Corporation  the  amount of any tax  which  may be  payable  in  respect  of any
transfer involved in such issuance or shall establish to the satisfaction of the
Corporation that such tax has been paid or is not payable.

     "(l) In case (A) the Corporation  shall take any action which would require
an adjustment  in the number of Common  Shares  issuable to holders of shares of
this Series upon conversion thereof pursuant to Section 7(g) above; or (B) there
shall be a voluntary or  involuntary  dissolution,  liquidation or winding up of
the affairs of the Corporation;  then the Corporation shall cause to be given to
the  holders  of the  shares  of this  Series  at least  ten  days  prior to the
applicable record date hereinafter  specified, a notice of (X) the date on which
a record is to be taken for the purpose of any dividend,  distribution  or grant
to holders of Common  Shares which would  require such an  adjustment,  or, if a
record is not to be taken,  the date as of which the holders of Common Shares of
record  to be  entitled  to such  dividend,  distribution,  or  grant  are to be
determined or (Y) the date on which such reorganization, reclassification,


                                      -23-

<PAGE>


amalgamation, sale, transfer, dissolution, liquidation or winding up is expected
to become  effective,  and the date as of which it is expected  that  holders of
Common  Shares of record shall be entitled to exchange  their Common  Shares for
securities   or  other   property  or  other   assets   deliverable   upon  such
reorganization,  reclassification,  amalgamation,  sale, transfer,  dissolution,
liquidation,  or winding up.  Failure to give such notice or any defect  therein
shall not affect the  legality  or  validity  of any  proceedings  described  in
subparagraphs (A) or (B) of this Section 7(l).

     "8. Miscellaneous.

     "(a) For the purposes hereof:

          "(i) the term "outstanding",  when used in reference to shares of this
     Series,  shall mean issued shares of this Series,  excluding shares of this
     Series called for redemption; and

          "(ii) any shares of a series or class of shares of the Corporation
     shall be deemed to rank:

               "(A) prior to shares of this Series,  whether or not the dividend
          rates,  dividend payment dates or redemption or liquidation prices per
          share thereof be different from those of shares of this Series, if the
          holders  of such  shares  of a  series  or class  of  shares  shall be
          entitled to receipt  from the  Corporation  of dividends or of amounts
          distributable   upon  liquidation,   dissolution  or  winding  up,  in
          preference or priority to the holders of shares of this Series, as the
          case may be;

               "(B) on a parity with or equal to shares of this Series,  whether
          or not the dividend  rates,  dividend  payment  dates or redemption or
          liquidation prices per share thereof be different from those of shares
          of this Series,  if the holders of such shares of a series or class of
          shares  shall be  entitled  to the  receipt  from the  Corporation  of
          dividends  or of  amounts  distributable  upon  liquidation  to  their
          respective dividend rates or liquidation prices, without preference or
          priority one over the other as between the holders of such shares of a
          series or class of shares and the  holders  of shares of this  Series;
          and

               "(C)  subordinate  to shares of this  Series,  whether or not the
          dividend  rates,  dividend  payment dates or redemption or liquidation
          prices per share thereof be different from those of


                                      -24-

<PAGE>


          shares of this Series,  if the rights of the holders of such shares of
          a series or class of shares shall be  subordinate to the rights of the
          holders of shares of this  Series in respect of the  receipt  from the
          Corporation   of   dividends   and  of  amounts   distributable   upon
          liquidation, dissolution or winding up, including, without limitation,
          the Common Shares of the Corporation.

     "(b) So long as any shares of this Series are outstanding,  in the event of
any conflict  between the  provisions  hereof and any corporate  document of the
Corporation  (both as presently  existing or hereafter amended and supplemented)
the provisions hereof, as the same may be amended or supplemented,  shall be and
remain controlling.

     "(c) The  holders of the  shares of this  Series  shall have no  preemptive
rights.





                      Sonus Corp. Completes $10 Million Private
                  Placement With Warburg, Pincus Ventures, L.P.

        PORTLAND,  OR--Oct. 4, 1999--Sonus Corp. (AMEX:SSN) today announced that
it has completed a private  placement of Series B Convertible  Preferred  Shares
with Warburg, Pincus Ventures,  L.P. ("Warburg"),  an investment fund managed by
E.M.  Warburg,  Pincus & Co. LLC of New York,  New York.  The proceeds  from the
$10,000,000   financing   will  he  used  for  working   capital   purposes  and
acquisitions.  The  Series B shares  are  initially  convertible  at $4.00  into
2,500,000 Sonus common shares.

        Brandon  M.  Dawson,  Chairman  and Chief  Executive  Officer  of Sonus,
commented,  "Since our initial  Warburg  financing in December  1997,  Sonus has
grown into the largest audiology-based retailer in the United States and Canada.
Our 217  Company-owned  and  franchised  clinics  operate  in 25 states  and two
Canadian  provinces.  Warburg has not only been our investor,  but our strategic
partner  during this  tremendous  growth  period.  With this second  infusion of
equity,  we plan to continue building Sonus into the industry leader involved in
all segments of the hearing healthcare market."

        In December  1997,  Warburg  purchased  Series A  Convertible  Preferred
Shares and  warrants to purchase up to  2,000,000  common  shares from Sonus for
$18,000,000.  The Series A shares are  convertible  into 2,666,666  Sonus common
shares.  In  conjunction  with the Series B financing,  the Company  reduced the
exercise  price of the warrants  from $12.00 to $6.75 per share.  As a result of
the issuance of the Series B Convertible  Preferred  Shares,  Warburg  possesses
approximately  46% of the  combined  voting  power of the Series A, Series B and
common shares outstanding. If Warburg were to exercise its warrant for 2,000,000
common shares,  it would possess  approximately 54% of the combined voting power
of the Company.

        In addition,  David  Wenstrup,  35, a vice president of Warburg,  Pincus
Ventures,   LLC,  has  joined  the  Company's  Board  of  Directors.   With  his
appointment, the number of Sonus directors increases to seven.

        Sonus Corp. is the largest audiology-based retailer in the United States
and Canada.  Sonus' 217 Company-owned  and franchised  hearing clinics provide a
full range of products and services to hearing impaired patients.  The Company's
vision is to become the premier  hearing care provider in North America.  Sonus'
strategy  involves the  consolidation  of the industry  through  acquisition  of
quality hearing care clinics.  To learn more about the Company,  visit the Sonus
website at www.sonus.com.

        E.M. Warburg, Pincus & Co. LLC and its affiliates comprise a specialized
financial  services  organization  that manages $7 billion of investments in its
private equity  investing  activities,  with a further $4 billion  available for
investment.

        This news release contains forward looking  statements which may involve
known and unknown  risks,  uncertainties  and other  factors  that may cause the
actual  results,  performance  or  achievements  of Sonus Corp. to he materially
different  from any future  results,  performance or  achievements  expressed or
implied by such forward looking  statements.  Such factors with respect to Sonus
Corp.  include  economic  trends in Sonus Corp.'s  market areas,  the ability of
Sonus Corp. to manage its growth and integrate new acquisitions into its network
of hearing care clinics,  the development of new or improved medical or surgical
treatments  for  hearing  loss  or  of  technological  advancements  in  hearing
instruments,   changes  in  the  application  or  interpretation  of  applicable
governmental laws and regulations, the ability of Sonus


<PAGE>


Corp.  to complete  additional  acquisitions  of hearing  care  clinics on terms
favorable  to Sonus  Corp.,  the degree of  consolidation  in the  hearing  care
industry,   Sonus  Corp.'s   success  in  attracting  and  retaining   qualified
audiologists  and staff to operate  its  hearing  clinics,  the ability of Sonus
Corp.  to attract  audiology  clinics  as  franchise  licensees  under the Sonus
Network,  product and professional  liability claims brought against Sonus Corp.
that exceed its insurance coverage, and the availability of and costs associated
with  potential  sources of financing.  Sonus Corp.  disclaims any obligation to
update any such  factors or to publicly  announce the results of any revision to
the forward  looking  statements  contained  herein to reflect  future events or
developments.

        CONTACT: Sonus Corp.
                 James L. Canessa
                 Director of Corporate Development
                 503/225-9152
                      or
                 SONUS' INVESTOR RELATIONS COUNSEL
                 The Equity Group Inc.
                 www.theequitygroup.com
                 Devin Sullivan
                 212/836-9608



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