DIALOGIC CORP
S-3, 1999-04-30
COMPUTER COMMUNICATIONS EQUIPMENT
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     As filed with the Securities and Exchange Commission on April 30, 1999

                                                        Registration No.
- --------------------------------------------------------------------------------

                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549
- --------------------------------------------------------------------------------


                                    FORM S-3
                                    ________

                             REGISTRATION STATEMENT
                                      Under
                           THE SECURITIES ACT OF 1933
                                 ---------------

                              DIALOGIC CORPORATION
             (Exact name of registrant as specified in its charter)

       New Jersey                                          22-2476114
(State or other jurisdiction of                           (I.R.S. Employer
 incorporation or organization)                            Identification No.)

                               1515 U.S. Route Ten
                          Parsippany, New Jersey 07054
                                 (973) 993-3000
               (Address, including zip code, and telephone number,
                 including area code, of registrant's principal
                               executive offices)
                                 ---------------

                                THEODORE M. WEITZ
                  Vice President, General Counsel and Secretary
                               1515 U.S. Route Ten
                          Parsippany, New Jersey 07054
                                 (973) 993-3000

            (Name, address, including zip code, and telephone number,
                   including area code, of agent for service)
                                 ---------------

                                    Copy to:
                            Peter H. Ehrenberg, Esq.
                              Lowenstein Sandler PC
                              65 Livingston Avenue
                           Roseland, New Jersey 07068
                                 ---------------

     Approximate date of commencement of proposed sale to the public:  From time
to time after the effective date of this Registration Statement.

     If the only  securities  being  registered  on this Form are being  offered
pursuant to dividend or interest  reinvestment plans, please check the following
box:  [ ]

     If any of the securities being registered on this Form are to be offered on
a delayed or continuous  basis  pursuant to Rule 415 under the Securities Act of
1933, other than securities offered only in connection with dividend or interest
reinvestment plans, check the following box: [X]



<PAGE>



     If this Form is filed to  register  additional  securities  for an offering
pursuant to Rule 462(b) under the Securities Act, please check the following box
and list  the  Securities  Act  registration  statement  number  of the  earlier
effective registration statement for the same offering. [ ]

     If this Form is a  post-effective  amendment  filed pursuant to Rule 462(c)
under the  Securities  Act,  check the following box and list the Securities Act
registration  statement number of the earlier effective  registration  statement
for the same offering. [ ]

     If delivery of the  prospectus is expected to be made pursuant to Rule 434,
please check the following box. [ ]

<TABLE>

                         CALCULATION OF REGISTRATION FEE


- ------------------------------------------------------------------------------
<CAPTION>
<S>                            <C>                    <C>                <C>                    <C> 

                                                                          Proposed
                                                       Proposed           maximum
   Title of each class                                 maximum            aggregate              Amount of
   of securities to be         Amount to be            offering price     offering               registration
   registered                  registered              per unit (1)       price (1)              fee               
- -------------------------------------------------------------------------------------------------------------------

Common Stock,
no par value                   720,550 Shares          $27.875            $20,085,332            $5,584
- ------------------------------------------------------------------------------
</TABLE>


(1)  Pursuant to Rule 457(c),  the proposed  maximum  offering price per unit is
     estimated solely for the purpose of calculating the registration fee and is
     based on the average of the high and low sale prices of the Common Stock on
     the NASDAQ National Market System on April 27, 1999.

     The Registrant  hereby amends this  Registration  Statement on such date or
dates as may be necessary to delay its effective date until the Registrant shall
file a further  amendment  which  specifically  states  that  this  Registration
Statement shall  thereafter  become effective in accordance with Section 8(a) of
the  Securities  Act of 1933 or until the  Registration  Statement  shall become
effective on such date as the Commission,  acting pursuant to said Section 8(a),
may determine.
- --------------------------------------------------------------------------------


<PAGE>


                              DIALOGIC CORPORATION
                                  ------------

                                 720,550 Shares
                                  Common Stock

     On  March  1,  1999,  Microsoft   Corporation,   a  Washington  corporation
("Microsoft" or the "Selling Shareholder"), acquired from Dialogic Corporation a
total of  860,681  shares of  Dialogic  Common  Stock  and a  warrant  entitling
Microsoft  to purchase up to an  additional  279,869  shares of Dialogic  Common
Stock. This prospectus  refers to the offer and sale by the Selling  Shareholder
of a total of 720,550 of these shares,  including all of the shares which may be
purchased upon exercise of the warrant. The term "Selling Shareholder" refers to
Microsoft and certain other persons referred to under "Plan of Distribution."

          Dialogic's Common Stock is listed on the Nasdaq National Market System
under the symbol "DLGC".  On             , 1999, the closing sales price of the 
Common Stock on the Nasdaq National Market System was $ .

     The Selling  Shareholder will sell its shares of Common Stock at prevailing
market  prices.  Dialogic  will not receive any of the proceeds from the sale of
the shares of Common Stock by the Selling Shareholder.

     Dialogic's  principal executive offices are located at 1515 U.S. Route Ten,
Parsippany, New Jersey 07054, and its telephone number is (973) 993-3000.

     Neither the  Securities and Exchange  Commission  nor any state  securities
commission has approved or  disapproved  of these  securities or passed upon the
adequacy or accuracy of this Prospectus. Any representation to the contrary is a
criminal offense.

                     The date of this Prospectus is             , 1999.


<PAGE>


                             ADDITIONAL INFORMATION

     We file annual, quarterly, and current reports, proxy statements, and other
documents  with the SEC. You may read and copy any document we file at the SEC's
Public Reference Room at Judiciary Plaza Building,  450 Fifth Street, N.W., Room
1024,   Washington,   D.C.  20549.  You  should  call  1-800-SEC-0330  for  more
information on the public  reference room. The SEC maintains an Internet site at
http://www.sec.gov where certain reports, proxy and information statements,  and
other information  regarding  issuers  (including  Dialogic  Corporation) may be
found.  You can also  obtain  copies of some of our  periodic  reports and proxy
statements from our Internet site at http://www.dialogic.com.

     This Prospectus is part of a registration  statement that we filed with the
SEC. The registration  statement  contains more information than this Prospectus
regarding Dialogic and our Common Stock, including certain exhibits. You can get
a copy of the registration statement from the SEC at the address listed above or
from its Internet site.

                 INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE

     The SEC allows us to "incorporate" into this Prospectus information we file
with  it  in  other  documents.  This  means  that  we  can  disclose  important
information   to  you  by  referring  to  other   documents  that  contain  that
information.  The information incorporated by reference is considered to be part
of  this   Prospectus,   and  information  we  file  later  with  the  SEC  will
automatically update and supersede this information. We incorporate by reference
the documents listed below,  except to the extent information in those documents
is different from the information  contained in this Prospectus,  and all future
documents  filed  with  the SEC  under  Sections  13(a),  13(c)  or 15(d) of the
Securities Exchange Act of 1934 until we terminate the offering of these shares:

     (a) Annual Report on Form 10-K for the fiscal year ended December 31, 1998;

     (b) Current Report on Form 8-K filed on March 22, 1999;

     (c) Current Report on Form 8-K filed on April 20, 1999; and

     (d)  The   description  of  Dialogic's   Common  Stock  set  forth  in  the
Registration  Statement  on Form 8-A  filed by us with the SEC on April 7,  1994
pursuant to Section 12 of the  Securities  Exchange  Act,  and any  amendment or
report filed for the purpose of updating any such description.

     We will provide  without  charge to each person,  including any  beneficial
owner of Common Stock,  to whom this  Prospectus  is delivered,  upon written or
oral request of such person,  a copy of any and all of the  documents  that have
been  incorporated by reference in this  Prospectus  (not including  exhibits to

<PAGE>

such documents unless such exhibits are  specifically  incorporated by reference
therein).  Requests should be directed to Dialogic Corporation,  1515 U.S. Route
Ten,  Parsippany,  New Jersey 07054,  Attention:  Theodore M. Weitz,  Secretary;
telephone number (973) 993-3000.

     You should rely only on the  information  contained in or  incorporated  by
reference in this document.  We have not  authorized  anyone to provide you with
information  that is  different.  The Common  Stock is not being  offered in any
state  where  the  offer  is not  permitted.  You  should  not  assume  that the
information in this Prospectus is accurate as of any date other than the date on
the front of this Prospectus.

                                   THE COMPANY

     Dialogic Corporation, formed in 1983, is the global leader in open computer
telephony and provides the critical building blocks and technical  services that
enable partners to develop solutions for the converging voice and data networks.
Dialogic  products  are used in voice,  fax,  data call  center  management  and
Internet Protocol telephony  applications in both customer premise equipment and
public network environments.


                               SELLING SHAREHOLDER

     On March 1, 1999, Dialogic entered into a Common Stock and Warrant Purchase
Agreement (the "Purchase Agreement") with Microsoft, pursuant to which Microsoft
purchased  (a)  860,681  shares  of Common  Stock  and (b) a  warrant  entitling
Microsoft  to purchase  279,869  shares of Common Stock at a price of $35.19 per
share, for an aggregate purchase price of $24,228,170.15. The warrant has a term
of four years and is exercisable at a price of $35.19 per share. Both the issued
shares and the shares  resulting from the exercise of the warrant are subject to
a lockup period beginning on March 2, 1999.  During the first year of the lockup
period,  Microsoft  may sell  none of the  shares,  and may only sell 50% of the
shares in the second year of the lockup  period.  Thereafter,  all shares may be
freely  sold.  On March 2, 1999,  Dialogic  issued  the  shares  and  warrant to
Microsoft.


                              PLAN OF DISTRIBUTION

     We are  registering  the shares of Common Stock covered by this  Prospectus
for the Selling Shareholder.  As used in this Prospectus,  "Selling Shareholder"
includes  the  pledgees,  donees,  transferees  or  others  who may  later  hold
Microsoft's interests in accordance with the terms of the Purchase Agreement. We
will pay the costs and fees of registering the shares of Common Stock covered by
this Prospectus, but the Selling Shareholder will pay any brokerage commissions,
discounts or other expenses relating to the sale of such shares.

     The  Selling  Shareholder  may  sell  the  shares  of  Common  Stock in the
over-the-counter market or otherwise, at market prices prevailing at the time of
sale,  at prices  related to the  prevailing  market  prices,  or at  negotiated
prices. In addition,  the Selling Shareholder may sell some or all of its shares
of Common Stock covered by this Prospectus through:

     o    a block  trade in which a  broker-dealer  may  resell a portion of the
          block, as principal, in order to facilitate the transaction;

     o    purchases  by  a  broker-dealer,  as  principal,  and  resale  by  the
          broker-dealer for its account;  or o ordinary  brokerage  transactions
          and transactions in which a broker solicits purchasers.

         When selling the shares of Common Stock,  the Selling  Shareholder  may
enter into hedging  transactions so long as such transactions do not violate the
terms of the Purchase Agreement. For example, the Selling Shareholder may:


     o    enter into transactions  involving short sales of the common shares by
          broker-dealers;  o sell shares of Common  Stock short  themselves  and
          redeliver such shares to close out their short positions;

     o    enter into  option or other  types of  transactions  that  require the
          Selling   Shareholder   to  deliver   shares  of  Common  Stock  to  a
          broker-dealer,  who will then  resell or  transfer  the common  shares
          under this prospectus; or

     o    loan or pledge the common shares to a broker-dealer,  who may sell the
          loaned shares or, in the event of default, sell the pledged shares.

         The  Selling   Shareholder   may  negotiate   and  pay   broker-dealers
commissions,  discounts or concessions for their services, provided that no such
commissions,  discounts  or  concessions  are paid by  Dialogic.  Broker-dealers
engaged by the Selling Shareholder may allow other broker-dealers to participate
in resales.  However, the Selling Shareholder and any broker-dealers involved in
the sale or resale of the common shares may qualify as "underwriters" within the
meaning of Section  2(a)(11) of the Securities Act of 1933 (the "1933 Act").  In
addition, the broker-dealers' commissions,  discounts or concessions may qualify
as  underwriters'  compensation  under the 1933 Act. If the Selling  Shareholder
qualifies as an  "underwriter,"  the Selling  Shareholder will be subject to the
prospectus delivery requirements of Section 5(b)(2) of the 1933 Act.

         In  addition  to  selling  their  shares of  Common  Stock  under  this
Prospectus,  the  Selling  Shareholder  may,  so  long as  such  actions  are in
accordance with the terms of the Purchase Agreement:

     o    agree  to  indemnify  any   broker-dealer  or  agent  against  certain
          liabilities  related to the  selling  of the  shares of Common  Stock,
          including liabilities arising under the 1933 Act;

     o    transfer  shares of Common  Stock in other ways not  involving  market
          makers or established  trading  markets,  including  directly by gift,
          distribution, or other transfer; or

     o    sell shares of Common Stock under Rule 144 of the 1933 Act rather than
          under this  Prospectus,  if the transaction  meets the requirements of
          Rule 144.

<PAGE>

                                 USE OF PROCEEDS

     Dialogic will not receive any proceeds from the sale of Common Stock by the
Selling Shareholder.


                           FORWARD LOOKING STATEMENTS

     The Private Securities Litigation Reform Act of 1995 (the "Act") provides a
"safe harbor" for  "forward-looking  statements"  (as defined in the Act).  This
Prospectus may include or incorporate  by reference  forward-looking  statements
which  reflect  Dialogic's  current  view (as of the date  such  forward-looking
statement  is made) with respect to future  events,  prospects,  projections  or
financial performance.  These forward-looking  statements are subject to certain
uncertainties  and other  factors  that  could  cause  actual  results to differ
materially  from those made,  implied or  projected  in such  statements.  These
uncertainties  and other  factors are set forth in  Dialogic's  Annual Report on
Form 10-K for the year ended December 31, 1998 and are incorporated by reference
herein.  The words  "believe,"  "expect,"  "anticipate,"  "project," and similar
expressions  identify  "forward-looking  statements," which speak only as of the
date the  statement  was made.  Dialogic  undertakes  no  obligation to publicly
update or revise  any  forward-looking  statements,  whether  as a result of new
information, future events or otherwise.


                                     EXPERTS

     The consolidated  financial  statements and the related financial statement
schedule  incorporated in this Prospectus by reference from the Company's Annual
Report on Form 10-K for the year ended  December 31, 1998,  have been audited by
Deloitte & Touche LLP, independent auditors,  as stated in their reports,  which
are incorporated herein by reference,  and have been so incorporated in reliance
upon the  reports  of such  firm  given  upon  their  authority  as  experts  in
accounting and auditing.


<PAGE>


                                     PART II

                     INFORMATION NOT REQUIRED IN PROSPECTUS

Item 14.  Other Expenses of Issuance and Distribution


         Securities and Exchange Commission
             registration fee....................................... $5,584
         Legal fees and expenses....................................  2,000
         Accounting fees and expenses...............................  4,000
         Miscellaneous expenses.....................................  2,000
             Total..................................................$13,584
                                                                     ======

     No  portion  of the  foregoing  expenses  will  be  borne  by  the  Selling
Shareholder.

     All expenses other than the Securities and Exchange Commission registration
fee are estimated.

Item 15.  Indemnification of Directors and Officers

     Under the Company's Restated Certificate of Incorporation, every person who
is or was a  director,  officer or  corporate  agent of  Dialogic is entitled to
receive  indemnification  from Dialogic to the fullest extent  permitted by law.
Under New Jersey law,  directors  and  officers  may be  indemnified  in certain
situations, subject to Dialogic's having taken certain actions and the directors
and  officers  having met  certain  specified  standards  of  conduct.  Dialogic
currently  maintains a directors' and officers'  insurance policy which provides
liability coverage with respect to its directors and officers.

     In addition,  Dialogic's Restated  Certificate of Incorporation  eliminates
the  personal   liability  of  directors   and  officers  to  Dialogic  and  its
shareholders  for the breach of any duty owed to  Dialogic  or its  shareholders
except to the extent that an exemption from personal  liability is not permitted
under the New Jersey Business  Corporation  Act. Each director and officer has a
fiduciary duty to manage the affairs of Dialogic with the same degree of care as
would be applied by an "ordinarily prudent person under similar  circumstances".
The  provisions  of  Dialogic's  Restated  Certificate  of  Incorporation  which
eliminate  the personal  liability of directors and officers do not, in any way,
eliminate or limit the liability of a director or officer for breaching his duty
of loyalty (i.e., the duty to refrain from fraud,  self-dealing and transactions
involving  improper  conflicts  of  interest)  to Dialogic  or its  shareowners,
failing to act in good faith, knowingly violating a law or obtaining an improper
personal  benefit and do not have any effect on the  availability  of  equitable
remedies.

     See also the undertakings set forth in response to item 17 herein.

<PAGE>

Item 16.  Exhibits


         3.1      Restated  Certificate of Incorporation of Dialogic Corporation
                  is  incorporated  by reference to Exhibit 3.1 to the Company's
                  Registration Statement on Form S-1 (file no. 33-59598).

         3.2      By-laws of Dialogic Corporation,  as amended, are incorporated
                  by  reference  to Exhibit  3.2 to the  Company's  Registration
                  Statement on Form S-1 (file no. 33-59598).

         5.1      Opinion of Lowenstein Sandler PC.

         10.1     Common Stock and Warrant Purchase Agreement, dated as of March
                  1, 1999, by and between Microsoft  Corporation and the Company
                  is incorporated by reference to Exhibit 10.13 to the Company's
                  Annual  Report on Form 10-K for the year  ended  December  31,
                  1998.

         23.1     Consent of Deloitte & Touche LLP

         23.2     Consent of Lowenstein Sandler PC is included in Exhibit 5.1.

         24.1     Power of Attorney.




<PAGE>


Item 17.  Undertakings

     The undersigned Registrant hereby undertakes:

     A. To file,  during any period in which  offers or sales are being made,  a
post-effective amendment to this Registration Statement:

                  (i) to include any prospectus  required by Section 10(a)(3) of
         the  Securities   Act  of  1933  (the  "Act"),   unless  the  foregoing
         information is contained in periodic reports filed with or furnished to
         the Commission by the Registrant pursuant to Section 13 or 15(d) of the
         Securities   Exchange  Act  of  1934  (the  "Exchange  Act")  that  are
         incorporated by reference in this Registration Statement; and

                  (ii) to reflect in the  prospectus any facts or events arising
         after the effective  date of this  Registration  Statement (or the most
         recent post-effective amendment thereof) which,  individually or in the
         aggregate,  represent a fundamental change in the information set forth
         in this  Registration  Statement,  unless the foregoing  information is
         contained in periodic reports filed with or furnished to the Commission
         by the  Registrant  pursuant to Section 13 or 15(d) of the Exchange Act
         that are incorporated by reference in this Registration Statement; and

                  (iii) to include any material  information with respect to the
         plan of  distribution  not  previously  disclosed in this  Registration
         Statement  or  any  material   change  to  such   information   in  the
         Registration Statement.

     B. That, for the purpose of determining  any liability  under the Act, each
such post-effective amendment shall be deemed to be a new registration statement
relating to the securities offered therein,  and the offering of such securities
at that time shall be deemed to be the initial bona fide offering thereof;

     C. To remove from  registration by means of a post-effective  amendment any
of the securities being registered which remain unsold at the termination of the
offering.

     D. That for  purposes of  determining  any  liability  under the Act,  each
filing of the  Registrant's  annual report  pursuant to Section 13(a) or Section
15(d) of the Exchange  Act (and,  where  applicable,  each filing of an employee
benefit plan's annual report pursuant to Section 15(d) of the Exchange Act) that
is incorporated by reference in this  Registration  Statement shall be deemed to
be a new Registration  Statement relating to the securities offered therein, and
the offering of such  securities  at that time shall be deemed to be the initial
bona fide offering thereof.

     E. That insofar as  indemnification  for liabilities  arising under the Act
may  be  permitted  to  directors,  officers  and  controlling  persons  of  the
Registrant pursuant to the provisions  described in Item 15 above, or otherwise,
the  Registrant  has been  advised  that in the  opinion of the  Securities  and
Exchange  Commission such  indemnification is against public policy as expressed
in the Act and is,  therefore,  unenforceable.  In the  event  that a claim  for

<PAGE>

indemnification  against  such  liabilities  (other  than  the  payment  by  the
Registrant of expenses  incurred or paid by a director,  officer or  controlling
person of the  Registrant  in the  successful  defense  of any  action,  suit or
proceeding)  is  asserted by such  director,  officer or  controlling  person in
connection with the securities being registered,  the Registrant will, unless in
the opinion of its counsel the matter has been settled by controlling precedent,
submit  to a  court  of  appropriate  jurisdiction  the  question  whether  such
indemnification  by it is against public policy as expressed in the Act and will
be governed by the final adjudication of such issue.


<PAGE>


                                   SIGNATURES

          Pursuant  to the  requirements  of the  Securities  Act of  1933,  the
registrant certifies that it has reasonable grounds to believe that it meets all
of the requirements for filing on Form S-3 and has duly caused this Registration
Statement  to be  signed  on its  behalf  by  the  undersigned,  thereunto  duly
authorized,  in the City of Parsippany,  State of New Jersey, on the 29th day of
April, 1999.

                                      DIALOGIC CORPORATION


                                      By:/s/ Thomas G. Amato          
                                         Thomas G. Amato, Vice President,
                                         Chief Financial Officer and Treasurer


         Pursuant  to the  requirements  of the  Securities  Act of  1933,  this
Registration  Statement  has been signed below by the  following  persons in the
capacities and on the dates indicated.

/s/  Howard G. Bubb*                President, Chief Executive    April 29, 1999
- --------------------
Howard G. Bubb                      Officer and Director


/s/  Nicholas Zwick*                Chairman of the Board         April 29, 1999
- ----------------------------------  and Director
Nicholas Zwick                      


/s/  Kenneth J. Burkhardt, Jr.*     Director                      April 29, 1999
- ------------------------------
Kenneth J. Burkhardt, Jr.


/s/ Thomas G. Amato*                Vice President, Chief         April 29, 1999
- ------------------------------      Financial Officer and
Thomas G. Amato                     Treasurer

/s/  Jean M. Beadle*                Chief Accounting              April 29, 1999
- ----------------------------------  Officer and Controller 
Jean M. Beadle                       


/s/  Masao Konomi*                   Director                     April 29, 1999
- -------------------------------
Masao Konomi


/s/  John N. Lemasters*              Director                     April 29, 1999
- ------------------------------
John N. Lemasters

<PAGE>


/s/  Francis G. Rodgers*             Director                     April 29, 1999
- ------------------------------
Francis G. Rodgers


/s/  James J. Shinn*                 Director                     April 29, 1999
- ------------------------------
James J.Shinn

By: /s/ Theodore M. Weitz
    --------------------------
        Theodore M. Weitz
        Attorney-in-Fact



<PAGE>


                                  EXHIBIT INDEX



     3.1  Restated  Certificate  of  Incorporation  of Dialogic  Corporation  is
          incorporated by reference to Exhibit 3.1 to the Company's Registration
          Statement on Form S-1 (file no. 33-59598).

     3.2  By-laws of Dialogic  Corporation,  as  amended,  are  incorporated  by
          reference to Exhibit 3.2 to the  Company's  Registration  Statement on
          Form S-1 (file no. 33-59598).

     5.1  Opinion of Lowenstein Sandler PC.

     10.1 Common  Stock and  Warrant  Purchase  Agreement,  dated as of March 1,
          1999,  by  and  between  Microsoft  Corporation  and  the  Company  is
          incorporated  by reference to Exhibit  10.13 to the  Company's  Annual
          Report on Form 10-K for the year ended December 31, 1998.

     23.1 Consent of Deloitte & Touche LLP

     23.2 Consent of Lowenstein Sandler PC is included in Exhibit 5.1.

     24.1 Power of Attorney.




                                   EXHIBIT 5.1

Dialogic Corporation                                              April 29, 1999
1515 U.S. Route 10
Parsippany, New Jersey  07054

                     Re: Registration Statement on Form S-3
Gentlemen:

          You  have  requested  our  opinion,  as your  securities  counsel,  in
connection  with the  registration  with the Securities and Exchange  Commission
under the Securities Act of 1933, as amended, of 720,550 shares of Common Stock,
no par value (the "Common Stock"), of Dialogic Corporation (the "Company") to be
offered from time to time by  Microsoft  Corporation.  Of such  shares,  440,681
shares have been issued to  Microsoft  Corporation  (the  "Issued  Shares")  and
279,869 shares (the "Warrant Shares") are issuable to Microsoft upon exercise of
warrants  that have been sold to Microsoft  Corporation  (the  "Warrants").  The
Common Stock is to be offered  pursuant to a registration  statement on Form S-3
(the "Registration Statement").

          We have examined and relied upon originals or copies, authenticated or
certified to our satisfaction, of a Common Stock and Warrant Purchase Agreement,
dated March 1, 1999, between the Company and Microsoft Corporation,  the Warrant
and all such corporate records of the Company,  communications or certifications
of public officials,  certificates of officers, directors and representatives of
the Company,  and such other  documents as we have deemed relevant and necessary
as the basis of the opinions  expressed herein.  In making such examination,  we
have  assumed  the  genuineness  of  all  signatures,  the  authenticity  of all
documents tendered to us as originals,  and the conformity to original documents
of all documents submitted to us as certified or photocopied copies.

          Based upon the foregoing and relying upon statements of fact contained
in the  documents  which we have  examined,  we are of the opinion  that (i) the
Issued  Shares  have been  legally  issued by the Company and are fully paid and
non-assessable and (ii) the Warrant Shares,  when issued by the Company pursuant
to the terms of the Warrant,  will be legally issued by the Company,  fully paid
and non-assessable.

          We hereby  consent to the filing of this  opinion as an exhibit to the
Registration  Statement and any amendment  thereto and to all references to this
firm contained in the Registration Statement.

                                                     Very truly yours,

                                                     LOWENSTEIN SANDLER PC


                                                     By: /s/ Peter H. Ehrenberg
                                                         _______________________
                                                           Peter H. Ehrenberg



                                  Exhibit 23.1

INDEPENDENT AUDITORS' CONSENT

     We consent to the incorporation by reference in this Registration Statement
of  Dialogic  Corporation  on Form S-3 of our  reports  dated  January  27, 1999
(except  for Note 10, as to which the date is March 2,  1999) and March 2, 1999,
appearing in and  incorporated by reference in the Annual Report on Form 10-K of
Dialogic  Corporation  for the year ended December 31, 1998 and to the reference
to us under  the  heading  "Experts"  in the  Prospectus,  which is part of this
Registration Statement.


/s/ Deloitte & Touche LLP

Parsippany, New Jersey
April 29, 1999



                                  EXHIBIT 24.1

                                POWER OF ATTORNEY


          WHEREAS,   the   undersigned   officers  and   directors  of  Dialogic
Corporation  desire to authorize Howard G. Bubb, Thomas G. Amato and Theodore M.
Weitz to act as their attorneys-in-fact and agents, for the purpose of executing
and  filing a  Registration  Statement  on Form S-3,  including  all  amendments
thereto,

          NOW, THEREFORE,

          KNOW ALL MEN BY THESE  PRESENTS,  that  each  person  whose  signature
appears  below  constitutes  and  appoints  Howard G. Bubb,  Thomas G. Amato and
Theodore M. Weitz,  and each of them, his true and lawful  attorney-in-fact  and
agent, with full power of substitution and resubstitution,  to sign the Dialogic
Corporation  Registration  Statement on Form S-3 to register  720,550  shares of
Dialogic Corporation's Common Stock with the Securities and Exchange Commission,
including any and all amendments and supplements  thereto, and to file the same,
with all exhibits thereto, and other documents in connection therewith, with the
Securities and Exchange  Commission,  granting unto said  attorneys-in-fact  and
agents,  and each of them,  full power and  authority to do and perform each and
every  act and  thing  requisite  and  necessary  to be done  in and  about  the
premises,  as fully and to all intents  and  purposes as he might or could do in
person,  hereby  ratifying and  confirming all that said  attorneys-in-fact  and
agents, or any of them, or their or his substitute or substitutes,  may lawfully
do or cause to be done by virtue hereof.

          IN  WITNESS  WHEREOF,  the  undersigned  have  executed  this power of
attorney in the following capacities on this 14th day of April, 1999.

                        SIGNATURE                               TITLE

/s/ Howard G. Bubb                            President, Chief Executive Officer
__________________                            and Director
Howard G. Bubb  

/s/ Kenneth J. Burkhardt, Jr.                 Director
___________________________
Kenneth J. Burkhardt, Jr.

/s/ Masao Konomi                              Director
___________________________
Masao Konomi

/s/ John N. Lemasters                         Director
___________________________
John N. Lemasters

/s/ Francis G. Rodgers                        Director
___________________________
Francis G. Rodgers

/s/ James J. Shinn                            Director
___________________________
James J. Shinn

/s/ Nicholas Zwick                            Director
___________________________
Nicholas Zwick

/s/ Jean Beadle                               Controller and Chief Accounting   
___________________________                   Officer (Chief Accounting Officer)
Jean Beadle                                   

/s/ Thomas G. Amato                           Treasurer, Vice President and 
__________________________                    Chief Financial  Officer    
Thomas G. Amato                               (Chief Financial Officer)




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