BAY NETWORKS INC
8-K, 1998-06-18
COMPUTER COMMUNICATIONS EQUIPMENT
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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):  June 15, 1998
 
 

                              BAY NETWORKS, INC.
            (Exact name of registrant as specified in its charter)


Delaware                            0-19366                  04-2916246
(State or other                   (Commission               (IRS Employer 
jurisdiction of                   File Number)              Identification No.)
incorporation) 


                         4401 Great America Parkway
                         Santa Clara, California                  95054
             (Address of Principal Executive Offices)           (Zip Code)
 
Registrant's telephone number, including area code: (408) 988-2400 


(Former name or former address, if changed since last report):












Exhibit Index Appears on Page 5.                             Page 1 of 5 pages
<PAGE>
ITEM 5.    Other Events

     On June 15, 1998, Bay Networks, Inc., a Delaware corporation ("Bay
Networks"), and Northern Telecom Limited, a corporation organized under the
laws of Canada ("Nortel"), entered into a definitive agreement and plan of
merger (the "Merger Agreement") pursuant to which Nortel will acquire Bay
Networks.  The Merger Agreement provides for the merger of a wholly-owned
subsidiary of Nortel, Northern Sub Inc. ("Merger Sub") with and into Bay
Networks (the "Merger"), as a result of which Bay Networks will become a
wholly-owned subsidiary of Nortel.  In connection with the execution of the
Merger Agreement, the parties entered into a Stock Option Agreement, dated as
of June 15, 1998 (the "Stock Option Agreement"), pursuant to which and
subject to the terms and conditions set forth therein, Bay Networks granted
to Nortel an option to purchase up to 14.9% of the outstanding shares of Bay
Networks.

     Pursuant to the Merger Agreement and subject to the terms and conditions
set forth therein, Bay Networks shareholders will receive a fixed exchange
ratio of 0.6 shares of common stock of Nortel for each share of common stock
of Bay Networks.  After the closing of the transaction, Bay Networks
shareholders are currently expected to own approximately 21 percent of the
outstanding common stock of Nortel.  The boards of directors of the two
companies have approved the transaction.

     The closing of the transaction is subject to a number of customary
conditions, including approval of the shareholders of Bay Networks, approval
under the Hart-Scott-Rodino Antitrust Improvements Act of 1976, as amended,
and certain other regulatory filings and approvals.  The transaction is 
intended to be tax-free to shareholders of Bay Networks.

     Copies of the Merger Agreement, the Stock Option Agreement and the press
release are attached hereto as Exhibits 2.1, 99.1 and 99.2 respectively.  The
foregoing descriptions of the Merger Agreement and the Stock Option Agreement
are qualified in their entirety by reference to the full text of such
exhibits.  The Merger Agreement, the Stock Option Agreement and the press 
release are hereby incorporated by reference.       
<PAGE>
ITEM 7.  Financial Statements and Exhibits

(c)  Exhibits

                                                              
Exhibit No.         Description                                         
 
2.1       Agreement and Plan of Merger among Northern Telecom Limited,
          Northern Sub Inc. and Bay Networks, Inc., dated as of June 15,
          1998.

99.1      Stock Option Agreement between Northern Telecom Limited and Bay
          Networks, Inc., dated as of June 15, 1998.

99.2      Joint Press Release issued by Bay Networks, Inc. and Northern
          Telecom Limited on June 15, 1998.
 
<PAGE>
SIGNATURES 

     Pursuant to the requirements of the Securities Exchange Act of 1934, as
amended, the registrant has duly caused this report to be signed on its
behalf by the undersigned hereunto duly authorized. 

                                 BAY NETWORKS, INC.
 

                                 By: /s/ John J. Poggi, Jr.                    
                                     Its:  Vice President, General Counsel and 
                                           Secretary


Date:  June 17, 1998
<PAGE>
                                 EXHIBIT INDEX

                                                              
Exhibit No.                      Description                                  
 
   2.1       Agreement and Plan of Merger among Northern Telecom Limited,
             Northern Sub Inc. and Bay Networks, Inc., dated as of June 15,
             1998.

   99.1      Stock Option Agreement between Northern Telecom Limited and Bay
             Networks, Inc., dated as of June 15, 1998.

   99.2      Joint Press Release issued by Bay Networks, Inc. and Northern
             Telecom Limited on June 15, 1998.  



                                                            EXHIBIT 2.1

                 AGREEMENT AND PLAN OF MERGER, dated as of June 15, 1998
(this "Agreement"), by and among NORTHERN TELECOM LIMITED, a corporation
organized under the laws of Canada ("Nortel"), NORTHERN SUB INC., a
corporation organized under the laws of Delaware ("Sub"), and BAY NETWORKS,
INC., a corporation organized under the laws of Delaware ("Bay").


                             W I T N E S S E T H :

                 WHEREAS, the Boards of Directors of each of Nortel, Sub and
Bay have determined that it is in the best interests of their respective
companies and their stockholders to consummate the strategic business
combination transaction provided for herein in which Sub will, subject to the
terms and conditions set forth herein, merge (the "Merger") with and into
Bay, so that Bay is the surviving corporation in the Merger;

                 WHEREAS, the parties intend that for U.S. federal income tax
purposes, the Merger qualify as a "reorganization"; 

                 WHEREAS, as a condition and an inducement to Nortel's
willingness to enter into this Agreement, Nortel and Bay are simultaneously
entering into a Stock Option Agreement (the "Option Agreement"), pursuant to
which Bay is granting Nortel an option exercisable upon the occurrence of
certain events; and

                 WHEREAS, the parties desire to make certain representations,
warranties and agreements in connection with the Merger and also to prescribe
certain conditions to the Merger.

                 NOW, THEREFORE, in consideration of the mutual
representations, warranties, covenants and agreements contained herein, and
intending to be legally bound hereby, the parties agree as follows:


                                   ARTICLE I

                              CERTAIN DEFINITIONS

                 1.01.  Certain Definitions.  As used in this Agreement, the
following terms shall have the meanings set forth below:

                 "Acquisition Proposal" shall mean (a) a merger or
consolidation, or any similar transaction, involving Bay or any Significant
Subsidiary of Bay (other than mergers, consolidations or similar transactions
involving solely Bay and/or one or more wholly-owned Subsidiaries of Bay),
(b) a purchase or other acquisition of greater than 15% of the consolidated
assets of Bay and its Subsidiaries, (c) a purchase or other acquisition
(including by way of merger, consolidation, share exchange, tender or
exchange offer or otherwise) of beneficial ownership of securities
representing more than 15% of the voting power of Bay or any Significant
Subsidiary of Bay, (d) any substantially similar transaction, or (e) any
inquiry or indication of interest with respect to any of the foregoing; in
each case other than the transactions contemplated by this Agreement and the
Option Agreement.
<PAGE>
                 "Agreement" shall have the meaning set forth in the first
paragraph of this Agreement.

                 "Bay" shall have the meaning set forth in the first
paragraph of this Agreement.

                 "Bay Affiliate" shall have the meaning set forth in
Section 6.07(a).

                 "Bay Board" shall mean the Board of Directors of Bay.

                 "Bay Certificate" shall mean the Restated Certificate of
Incorporation of Bay, as amended.

                 "Bay Common Stock" shall have the meaning set forth in
Section 3.01(b).

                 "Bay Employee" shall have the meaning set forth in Section
6.13(a).

                 "Bay Filed SEC Documents" shall have the meaning set forth
in Section 5.03(h).

                 "Bay Intellectual Property Rights" shall have the meaning
set forth in Section 5.03(p).

                 "Bay Meeting" shall have the meaning set forth in
Section 6.02.

                 "Bay Proxy Statement" shall have the meaning set forth in
Section 6.03(a).

                 "Bay SEC Documents" shall have the meaning set forth in
Section 5.03(g).

                 "Bay Stock Option" shall have the meaning set forth in
Section 3.07(a).

                 "Business Day" shall mean each day on which banking
institutions in either or both of Toronto, Canada and New York, New York are
not authorized or required to close.

                 "Canadian GAAP" shall mean Canadian generally accepted
accounting principles.

                 "Canadian Stock Exchanges" shall mean the Toronto, Montreal
and Vancouver stock exchanges.

                 "Code" shall mean the U.S. Internal Revenue Code of 1986, as
amended.

                 "Confidentiality Agreement" shall mean that certain
confidentiality agreement, dated May 19, 1998, by and between Nortel and Bay.

                 "Costs" shall have the meaning set forth in Section 6.12(a).
<PAGE>
                 "DGCL" shall mean the General Corporation Law of the State
of Delaware.

                 "Disclosure Schedule" shall have the meaning set forth in
Section 5.01.

                 "Effective Date" shall have the meaning set forth in
Section 2.02.

                 "Effective Time" shall have the meaning set forth in
Section 2.02.

                 "Environmental Laws" shall have the meaning set forth in
Section 5.03(o).

                 "ERISA" shall mean the U.S. Employee Retirement Income
Security Act of 1974, as amended.

                 "ERISA Affiliate" shall have the meaning set forth in
Section 5.03(l).

                 "Exchange Act" shall mean the U.S. Securities Exchange Act
of 1934, as amended, and the rules and regulations promulgated thereunder.

                 "Exchange Agent" shall have the meaning set forth in Section
3.05(a).

                 "Exchange Fund" shall have the meaning set forth in
Section 3.05(a).

                 "Exchange Ratio" shall mean 0.60, subject to Section 3.06
hereof.

                 "Exon-Florio" shall have the meaning set forth in Section
5.03(r).

                 "Governmental Authority" means any court, administrative
agency or commission or other foreign or domestic federal, state, provincial
or local governmental authority or instrumentality.

                 "Indemnified Party" shall have the meaning set forth in
Section 6.12(a).

                 "Indenture" shall have the meaning set forth in Section
6.16.

                 "Insurance Amount" shall have the meaning set forth in
Section 6.12(b).

                 "Intellectual Property Rights" shall mean all proprietary
rights in and to:  (A) trademarks, service marks, brand names, certification
marks, trade dress, assumed names, trade names and other indications of
origin; (B) patents and invention disclosures; (C) trade secrets and other
confidential or non-public business information, including ideas, formulas,
compositions, discoveries and improvements, know-how, manufacturing and
production processes and techniques, and research and development information
(whether patentable or not); drawings, specifications, designs, plans,
<PAGE>
proposals and technical data; business and marketing plans and customer and
supplier lists and information; (D) writings and other copyrightable works of
authorship, including computer programs, data bases and documentation
therefor, and all copyrights to any of the foregoing; (E) mask works; (F)
moral rights; (G) any similar intellectual property or proprietary rights;
(H) registrations of, and applications to register, any of the foregoing with
any governmental authority and any renewals or extensions thereof; and (I)
any claims or causes of action arising out of or related to any infringement
or misappropriation of any of the foregoing; in each case in any
jurisdiction.

                 "IP License" shall have the meaning set forth in Section 
5.03(p).

                 "Knowledge" with respect to a party shall mean to the
knowledge of its senior executive officers after reasonable inquiry.

                 "Legal Requirement" shall have the meaning set forth in
Section 5.03(l).

                 "Liens" shall mean any charge, mortgage, pledge, security
interest, restriction, claim, lien, or encumbrance.

                 "Material Adverse Effect" shall mean with respect to any
party, any change, circumstance or effect that (i) is or is reasonably likely
to be materially adverse to the business, condition (financial or otherwise)
or results of operations of such party and its Subsidiaries taken as a whole,
other than any change, circumstance or effect relating to (1) the economy in
general or (2) the industries in which such party operates, which change,
circumstance or effect (in the case of clause (2)), does not affect Nortel or
Bay, as the case may be, disproportionately relative to other entities
operating in such industry; provided that none of the following shall by
itself be deemed to constitute a Material Adverse Effect: (a) a change in the
market price or trading volume of Nortel Common Stock or Bay Common Stock or
(b) any change, circumstance or effect that the party asserting that a
Material Adverse Effect has not occurred can demonstrate arises directly out
of or results directly from actions contemplated by the parties in connection
with, or which is directly attributable to, (x) the announcement of this
Agreement or (y) the transactions contemplated hereby, to the extent so
attributable; or (ii) would materially impair the ability of either Nortel or
Bay, respectively, to perform its obligations under this Agreement.

                 "Merger" shall have the meaning set forth in the recitals to
this Agreement and in Section 2.01(a).

                 "Merger Consideration" shall have the meaning set forth in
Section 2.01(a).

                 "Multiemployer Plans" shall have the meaning set forth in
Section 5.03(l).

                 "New Certificates" shall have the meaning set forth in
Section 3.05(a).

                 "Nortel" shall have the meaning set forth in the first
paragraph of this Agreement.
<PAGE>
                 "Nortel Board" shall mean the Board of Directors of Nortel.

                 "Nortel Certificate" shall mean the Certificate and Articles
of Amalgamation of Nortel dated January 4, 1982, as amended from time to time
by the Certificates and Articles of Amendment of Nortel.

                 "Nortel Common Stock" shall have the meaning set forth in
Section 3.01(a).

                 "Nortel Plan" shall have the meaning set forth in Section
6.13(b).

                 "Nortel Proxy Statement" shall have the meaning set forth in
Section 6.03(a).

                 "Nortel SEC Documents" shall have the meaning set forth in
Section 5.04(g).

                 "NYSE" shall mean the New York Stock Exchange, Inc.

                 "Old Certificates" shall have the meaning set forth in
Section 3.05(a).

                 "Option Agreement" shall have the meaning set forth in the
recitals hereof.

                 "Pension Plan" shall have the meaning set forth in
Section 5.03(l).

                 "Person" or "person" shall mean any individual, bank,
corporation, limited liability company, partnership, association, joint-stock
company, business trust or unincorporated organization.

                 "Plans" shall have the meaning set forth in Section 5.03(l).

                 "Previously Disclosed" by a party shall mean information
disclosed in its Filed SEC Documents or set forth in its Disclosure Schedule.

                 "Registration Statement" shall have the meaning set forth in
Section 6.03(a).

                 "Rights" shall mean, with respect to any person, securities
or obligations convertible into or exercisable or exchangeable for, or giving
any person any right to subscribe for or acquire, or any options, calls or
commitments relating to, or any stock appreciation right or other instrument
the value of which is determined in whole or in part by reference to the
market price or value of, shares of capital stock of such person.

                 "Rights Agreement" shall mean the Rights Agreement, dated as
of February 7, 1995, between Bay and The First National Bank of Boston,
Rights Agent.

                 "SEC" shall mean the United States Securities and Exchange
Commission.

                 "Securities Act" shall mean the Securities Act of 1933, as
amended, and the rules and regulations promulgated thereunder.
<PAGE>
                 "Seller Group" shall have the meaning set forth in Section
5.03(l).

                 "Severance Plan" shall have the meaning set forth in Section
6.13(a).

                 "Sub" shall have the meaning set forth in the first
paragraph of this Agreement.

                 "Sub Common Stock" shall have the meaning set forth in
Section 3.01(a).

                 "Subsidiary" and "Significant Subsidiary" shall have the
meanings ascribed to them in Rule 1-02 of Regulation S-X of the SEC.

                 "Superior Proposal" shall have the meaning set forth in
Section 6.06(a).

                 "Surviving Corporation" shall have the meaning set forth in
Section 2.01(a).

                 "Takeover Laws" shall have the meaning set forth in
Section 5.03(n).

                 "Tax Returns" shall have the meaning set forth in
Section 5.03(q).

                 "Taxes" shall mean all taxes, charges, fees, levies or other
assessments, however denominated, including, without limitation, all net
income, gross income, gross receipts, sales, use, ad valorem, goods and
services, capital, transfer, franchise, profits, license, withholding,
payroll, employment, employer health, excise, estimated, severance, stamp,
occupation, property or other taxes, custom duties, fees, assessments or
charges of any kind whatsoever, together with any interest and any penalties,
additions to tax or additional amounts imposed by any taxing authority
whether arising before, on or after the Effective Date.

                 "Treasury Shares" shall mean shares of Bay Common Stock held
by Bay or any of its Subsidiaries.

                 "U.S. GAAP" shall mean United States generally accepted
accounting principles.

                 "Year 2000 Compliant" shall have the meaning set forth in
Section 5.03(v).

                 "$" shall mean United States Dollar.


                                  ARTICLE II

                       THE MERGER; EFFECTS OF THE MERGER

                 2.01.  The Merger.  (a)  The Surviving Corporation.  Upon
the terms and subject to the conditions set forth in this Agreement, and in
accordance with the DGCL, at the Effective Time, Sub will merge with and into
Bay.  Following the Effective Time, the separate corporate existence of Sub
<PAGE>
shall cease and Bay shall survive and continue to exist as a Delaware
corporation (Bay, as the surviving corporation in the Merger, sometimes being
referred to herein as the "Surviving Corporation").

                 (b)  Effectiveness and Effects of the Merger.  Subject to
the satisfaction or waiver of the conditions set forth in Article VII in
accordance with this Agreement, the Merger shall become effective upon the
occurrence of the filing in the office of the Secretary of State of the State
of Delaware of a certificate of merger in accordance with Section 251 of the
DGCL, or such later date and time as may be set forth in such certificate. 
The Merger shall have the effects prescribed in the DGCL.  Without limiting
the generality of the foregoing, and subject thereto, at the Effective Time
all the property, rights, privileges, powers and franchises of Bay and Sub
shall be vested in the Surviving Corporation, and all debt, liabilities and
duties of Bay and Sub shall become the debt, liabilities and duties of the
Surviving Corporation.

                 (c)  Certificate of Incorporation and By-Laws.  The
certificate of incorporation and by-laws of the Surviving Corporation, as in
effect immediately prior to the Effective Time, shall be those of Bay until
thereafter changed or amended as provided therein or by applicable law.

                 (d)  Name.  The name of the Surviving Corporation shall
remain Bay Networks, Inc.

                 (e)  Officers and Directors of Surviving Corporation.  The
officers of Bay as of the Effective Time shall be the officers of the
Surviving Corporation, until the earlier of their resignation or removal or
otherwise ceasing to be an officer or until their respective successors are
duly elected and qualified, as the case may be.  The directors of Sub as of
the Effective Time shall be the directors of the Surviving Corporation until
the earlier of their resignation or removal or otherwise ceasing to be a
director or until their respective successors are duly elected and qualified.

                 2.02.  Effective Date and Effective Time.  Subject to the
satisfaction or waiver (subject to applicable law) of the conditions as set
forth in Article VII in accordance with this Agreement, the parties shall
cause the effective date of the Merger (the "Effective Date") to occur on (i)
the third Business Day to occur after the last of the conditions set forth in
Section 7.01 shall have been satisfied or waived in accordance with the terms
of this Agreement or (ii) such other date to which the parties may agree in
writing.  The time on the Effective Date when the Merger shall become
effective is referred to as the "Effective Time."

                 2.03.  Tax Consequences.  It is intended that the Merger
shall qualify as a reorganization under Section 368(a) of the Code.


                                  ARTICLE III

                   CONVERSION OF SHARES; EXCHANGE PROCEDURES

                 3.01.  Conversion of Shares.  Subject to the provisions of
this Agreement, at the Effective Time, automatically by virtue of the Merger
and without any action on the part of any party or stockholder:
<PAGE>
                 (a)  Conversion of Sub Common Stock.  Each share of common
stock of Sub, par value $0.01 per share (the "Sub Common Stock"), issued and
outstanding immediately prior to the Effective Time, shall be converted into
one newly issued, fully-paid and non-assessable share of preferred stock,
$0.01 par value, of the Surviving Corporation, pursuant to a Certificate of
Designations proposed by Nortel and approved by Bay, such approval not to be
unreasonably withheld or delayed.

                 (b)  Conversion of Bay Common Stock.  Each share of common
stock, par value $0.01 per share, of Bay (the "Bay Common Stock") issued and
outstanding immediately prior to the Effective Time (other than shares of Bay
Common Stock to be canceled pursuant to Section 3.01(c)) shall become and be
converted into the right to receive a fraction of a common share, without par
value, of Nortel ("Nortel Common Stock"), equal to the Exchange Ratio,
together with any cash to be paid pursuant to Section 3.04.  All of the
shares of Bay Common Stock converted into the right to receive Nortel Common
Stock (or cash pursuant to Section 3.04) pursuant to this Article III shall
no longer be outstanding and shall automatically be canceled and shall cease
to exist as of the Effective Time.

                 (c)  Treasury Shares.  Each share of Bay Common Stock held
by Bay or any wholly owned Subsidiary of Bay as Treasury Shares immediately
prior to the Effective Time or owned by Nortel or any Subsidiary thereof
shall no longer be outstanding and shall automatically be canceled and
retired at the Effective Time and no consideration shall be issued in
exchange therefor.

                 3.02.  Issuance of Shares of the Surviving Corporation.  At
the Effective Time, in consideration of the issuance by Nortel of Nortel
Common Stock to the holders of Bay Common Stock in accordance with Section
3.01(b), the Surviving Corporation shall issue to Nortel a number of shares
of newly issued, fully-paid and non-assessable common stock, $0.01 par value,
of the Surviving Corporation, which number shall be equal to the number of
shares of Bay Common Stock outstanding as of immediately prior to the
Effective Time.

                 3.03.  Rights as Stockholders; Stock Transfers.  At the
Effective Time, holders of Bay Common Stock shall cease to be, and shall have
no rights as, stockholders of Bay, other than to receive any dividend or
other distribution with respect to such Bay Common Stock with a record date
occurring prior to the Effective Time and the consideration provided under
this Article III.  After the Effective Time, there shall be no transfers on
the stock transfer books of Bay or the Surviving Corporation of shares of Bay
Common Stock.

                 3.04.  Fractional Shares.  Notwithstanding any other
provision hereof, no fractional shares of Nortel Common Stock and no
certificates or scrip therefor, or other evidence of ownership thereof, will
be issued in the Merger; instead, Nortel shall pay to each holder of Bay
Common Stock who would otherwise be entitled to a fractional share of Nortel
Common Stock (after taking into account all Old Certificates delivered by
such holder) an amount (in U.S. dollars) in cash (without interest)
determined by multiplying such fraction by the average of the last sale
prices of Nortel Common Stock, as reported by the NYSE Composite Transactions
Reporting System (as reported in The Wall Street Journal or, if not reported
therein, in another authoritative source), for the five NYSE trading days
immediately preceding the Effective Date.  As promptly as practicable after
<PAGE>
the determination of the amount of cash, if any, to be paid to holders of
fractional interests, the Exchange Agent shall so notify Nortel, and Nortel
shall cause the Surviving Corporation to deposit such amount with the
Exchange Agent and shall cause the Exchange Agent to forward payments to such
holders of fractional interests subject to and in accordance with the terms
hereof.

                 3.05.  Exchange Procedures.  (a)  At or prior to the
Effective Time, Nortel shall deposit, or shall cause to be deposited, with a
bank or trust company having net capital of not less than $100,000,000 (the
"Exchange Agent"), for the benefit of the holders of certificates formerly
representing shares of Bay Common Stock ("Old Certificates"), for exchange in
accordance with this Article III, certificates representing the shares of
Nortel Common Stock ("New Certificates") and an estimated amount of cash
pursuant to Section 3.04 (such cash and New Certificates (without any
interest on any such cash), being hereinafter referred to as the "Exchange
Fund") to be paid pursuant to this Article III in exchange for outstanding
shares of Bay Common Stock.

                 (b)  As promptly as practicable after the Effective Date,
Nortel shall send or cause the Exchange Agent to send to each former holder
of record of shares (other than Treasury Shares) of Bay Common Stock
immediately prior to the Effective Time transmittal materials for use in
exchanging such stockholder's Old Certificates for the consideration set
forth in this Article III.  Nortel shall cause the New Certificates
representing shares of Nortel Common Stock into which shares of a
stockholder's Bay Common Stock are converted at the Effective Time and/or any
check in respect of any fractional share interests or dividends or
distributions which such person shall be entitled to receive pursuant to this
Article III to be delivered to such stockholder upon delivery to the Exchange
Agent of Old Certificates representing such shares of Bay Common Stock (or,
pursuant to Section 3.05(f), indemnity reasonably satisfactory to Nortel and
the Exchange Agent, if any of such certificates are lost, stolen or
destroyed) owned by such stockholder.  No interest will be paid on any such
cash to be paid in lieu of fractional share interests or in respect of
dividends or distributions which any such person shall be entitled to receive
pursuant to this Article III upon such delivery.

                 (c)  Notwithstanding the foregoing, neither the Exchange
Agent nor any party hereto shall be liable to any former holder of Bay Common
Stock for any amount properly delivered to a public official pursuant to
applicable abandoned property, escheat or similar laws. 

                 (d)  No dividends or other distributions with respect to
Nortel Common Stock with a record date occurring after the Effective Time
shall be paid to the holder of any unsurrendered Old Certificate representing
shares of Bay Common Stock converted in the Merger into the right to receive
shares of such Nortel Common Stock and cash in lieu of fractional shares of
Nortel Common Stock pursuant to Section 3.04, until the holder thereof shall
be entitled to receive New Certificates and such amount of cash in exchange
therefor in accordance with this Article III.  After becoming so entitled in
accordance with this Article III, the record holder thereof also shall be
entitled to receive any such dividends or other distributions, without any
interest thereon, which theretofore had become payable with respect to shares
of Nortel Common Stock such holder had the right to receive upon surrender of
the Old Certificate.
<PAGE>
                 (e)  Any portion of the Exchange Fund that remains unclaimed
by the stockholders of Bay for six months after the Effective Time shall be
paid or delivered to Nortel.  Any stockholders of Bay who have not
theretofore complied with this Article III shall thereafter look only to
Nortel for payment of the shares of Nortel Common Stock, cash in lieu of any
fractional shares and unpaid dividends and distributions on the Nortel Common
Stock deliverable in respect of each share of Bay Common Stock such
stockholder holds as determined pursuant to this Agreement, in each case,
without any interest thereon.

                 (f)  If any Old Certificate shall have been lost, stolen or
destroyed, upon the making of an affidavit of that fact by the person
claiming such Old Certificate to be lost, stolen or destroyed and, if
required by Nortel, the posting by such person of a bond in such reasonable
amount as Nortel may direct as indemnity against any claim that may be made
against it or the Surviving Corporation with respect to such Old Certificate,
Nortel shall, in exchange for such lost, stolen or destroyed Old Certificate,
deliver or cause the Exchange Agent to deliver a New Certificate in respect
thereof pursuant to this Article III.

                 3.06.  Anti-Dilution Provisions.  In the event Nortel
changes (or establishes a record date for changing) the number of shares of
Nortel Common Stock issued and outstanding prior to the Effective Date as a
result of a stock split, stock dividend, recapitalization, subdivision,
reclassification, combination, exchange of shares or similar transaction with
respect to the outstanding Nortel Common Stock and the record date therefor
shall be prior to the Effective Date, the Exchange Ratio shall be
proportionately adjusted to reflect such stock split, stock dividend,
recapitalization, subdivision, reclassification, combination, exchange of
shares or similar transaction.

                 3.07.  Stock Options and Other Stock Plans. (a)  Each Bay
Stock Option outstanding at the Effective Time shall be assumed by Nortel and
deemed to constitute an option to acquire, on the same terms and conditions,
mutatis mutandis (including, without limitation adjustments for any stock
dividend, subdivision, reclassification, recapitalization, split,
combination, exchange of shares or similar transaction), as were applicable
under such Bay Stock Option prior to the Effective Time, the number of shares
of Nortel Common Stock as the holder of such Bay Stock Option would have been
entitled to receive pursuant to the Merger had such holder exercised such Bay
Stock Option in full immediately prior to the Effective Time (not taking into
account whether or not such option was in fact exercisable) at a price per
share equal to (i) the aggregate exercise price for Bay Common Stock
otherwise purchasable pursuant to such Bay Stock Option divided by (ii) the
number of shares of Nortel Common Stock deemed purchasable pursuant to such
assumed Bay Stock Option; provided that the number of shares of Nortel Common
Stock that may be purchased upon exercise of any such Bay Stock Option shall
not include any fractional share and, upon exercise of such Bay Stock Option,
a cash payment shall be made for any fractional share based upon the last
sale price per share of Nortel Common Stock on the trading day immediately
preceding the date of exercise.  Within three Business Days after the
Effective Time, Nortel or the Surviving Corporation shall cause to be
delivered to each holder of an outstanding Bay Stock Option an appropriate
notice setting forth such holder's rights pursuant thereto, and such assumed
Bay Stock Option (as adjusted with respect to exercise price and the number
of shares of Nortel Common Stock purchasable) shall continue in effect on the
same terms and conditions.  From and after the Effective Time, Nortel and the
<PAGE>
Surviving Corporation shall comply with the terms of each Bay Stock Option
Plan pursuant to which Bay Stock Options were granted; provided, that the
Nortel board of directors or an appropriate committee thereof shall succeed
to the authorities and responsibilities of the Bay Board or any committee
thereof under such plan.  The adjustments provided herein with respect to any
Stock Options that are "incentive stock options" (as defined in Section 422
of the Code) shall be effected in a manner consistent with Section 424(a) of
the Code.

                 (b)  Nortel shall cause to be taken all corporate action
necessary to reserve for issuance a sufficient number of shares of Nortel
Common Stock for delivery upon exercise of Bay Stock Options in accordance
with this Section 3.07.  Within three Business Days after the Effective Time,
Nortel shall use its best efforts to cause the Nortel Common Stock subject to
Bay Stock Options to be registered under the Securities Act pursuant to a
registration statement on Form S-8 (or any successor or other appropriate
forms) and shall use its best efforts to cause the effectiveness of such
registration statement (and current status of the prospectus or prospectuses
contained therein) to be maintained for so long as Bay Stock Options remain
outstanding.

                 (c)  Bay shall take such action as is necessary to cause
the ending date of the then current offering period under each Bay employee
stock purchase plan to be prior to the Effective Time, subject to the terms
of such plan (the "Final Purchase Date"); provided that such change in the
offering period shall be conditioned upon the consummation of the Merger.  On
the Final Purchase Date, Bay shall apply the funds credited as of such date
under such Bay employee stock purchase plan within each participant's payroll
withholding account to the purchase of whole shares of Bay Common Stock in
accordance with the terms of such Bay employee stock purchase plan.


                                  ARTICLE IV

                            ACTIONS PENDING MERGER

                 4.01.  Forbearances of Bay.  From the date hereof until the
Effective Time, except as expressly contemplated by this Agreement, as
required by a Governmental Authority of competent jurisdiction or as set
forth in Section 4.01 of Bay's Disclosure Schedule, without the prior written
consent of Nortel, Bay will not, and will cause each of its Subsidiaries not
to:

                 (a)  Ordinary Course.  Conduct its business and the business
of its Subsidiaries other than in the ordinary and usual course in all
material respects and in compliance with applicable laws and regulations or,
to the extent consistent therewith, fail to use reasonable best efforts to
preserve intact their business organizations and assets and maintain their
rights, franchises and existing relations with customers, suppliers,
employees and business associates, or take any action that would adversely
affect its ability to perform any of its material obligations under this
Agreement; provided, however, that no action by Bay or its Subsidiaries with
respect to matters specifically addressed by any other provision of this
Section 4.01 shall be deemed a breach of this Section 4.01(a) unless such
action would constitute a breach of one or more of such other provisions.
<PAGE>
                 (b)  Capital Stock.  (i)  Issue, sell, pledge, dispose of or
encumber, or authorize or propose the issuance, sale, pledge, disposition or
encumbrance of, any shares of its capital stock or any Rights, (ii) enter
into any agreement with respect to the foregoing or (iii) permit any
additional shares of capital stock to become subject to new grants of
employee or director stock options, other Rights or similar stock-based
employee rights, other than (i) the issuance of Bay Common Stock (and the
associated Bay Rights) upon the exercise of stock options outstanding as of
the date hereof issued in the ordinary course of business in accordance with
the terms of the Bay Plans as in effect on the date of this Agreement, (ii)
issuances by a wholly owned Subsidiary of Bay of capital stock to such
Subsidiary's parent, (iii) issuances to comply with Bay's obligations to
holders of notes under the Indenture who convert such notes, (iv) issuances
to comply with Bay's obligations under its 1994 Employee Stock Purchase Plan
and 1998 Employee Stock Purchase Plan and (v) issuances of Rights or other
awards, in numbers no greater in the aggregate than those set forth in
Section 4.01(d) hereof.

                 (c)  Dividends, Etc.  (i) Make, declare, pay or set aside
for payment any dividend (other than dividends from Bay's Subsidiaries to Bay
or another Subsidiary of Bay) on or in respect of, or declare or make any
distribution on any shares of its capital stock or (ii) except for any such
transaction by a wholly owned Subsidiary of Bay which remains a wholly owned
Subsidiary after consummation of such transaction and except for the purchase
from time to time by Bay of Bay Common Stock (and associated Bay Rights) in
the ordinary course of business in connection with its existing Plans,
directly or indirectly adjust, split, combine, redeem, reclassify, purchase
or otherwise acquire, any shares of its capital stock.

                 (d)  Compensation; Employment Agreements; Etc.  Enter into
or amend any employment, consulting, severance or similar agreements or
arrangements with any of its directors, officers or employees or former
directors, officers or employees, or grant any salary or wage increase, make
any award or grant under any Plan or increase any employee benefit (including
incentive or bonus payments), except (i) in the ordinary course of business,
(ii) for changes required by law, (iii) to satisfy contractual obligations
existing as of the date hereof, (iv) on or prior to October 31, 1998 for
grants of stock options for up to an aggregate of 2 million shares of Bay
Common Stock for newly hired employees and the retention or promotion of
current employees and (v) on or after November 1, 1998, for grants of stock
options for up to an aggregate number of shares equal to the excess of (A) 10
million shares of Bay Common Stock over (B) the number of shares of Bay
Common Stock subject to employee stock options granted on or after the date
hereof, such grants to be made in connection with newly hired employees, the
retention or promotion of current employees, and the regular annual grant of
options in accordance with past practice; provided that no grant may be made
pursuant to clauses (iv) and (v) above to Messrs. House, Shrigley, Rynne,
Carney, Pearse, Russo or Hawe without the consent of the Chief Executive
Officer of Nortel.

                 (e)  Benefit Plans.  Enter into or amend in any material
respect (except (i) as may be required by applicable law, (ii) to satisfy
contractual obligations existing as of the date hereof or (iii) as expressly
provided for herein) any pension, retirement, stock option, stock purchase,
savings, profit sharing, deferred compensation, bonus, group insurance or
other employee benefit, incentive or welfare plan.
<PAGE>
                 (f)  Acquisitions and Dispositions.  (i)  Other than (A)
acquisitions in existing or related lines of business of Bay the fair market
value of the total consideration (including the value of indebtedness or
other liability assumed) for which does not exceed $12.5 million individually
or $50 million in the aggregate and (B) other than the acquisition of assets
used in the operations of the business of Bay and its Subsidiaries in the
ordinary course, acquire all of any portion of the assets, business or
properties of any other entity; provided that the foregoing shall not
prohibit (x) internal reorganizations or consolidations involving existing
Subsidiaries of Bay or (y) the creation of new Subsidiaries of Bay organized
to conduct or continue activities otherwise permitted by this Agreement.

                 (ii)  Other than (i) internal reorganizations or
consolidations involving existing Subsidiaries of Bay, (ii) dispositions
referred to in the Bay Filed SEC Documents, (iii) as may be required by law
in order to permit the consummation of the transactions contemplated hereby
or (iv) in the ordinary course of business, sell, transfer, mortgage,
encumber or otherwise dispose of or discontinue any portion of its assets,
business or properties.

                 (g)  Amendments.  Amend the Bay Certificate or Bay's by-
laws.

                 (h)  Accounting Methods.  Implement or adopt any change in
its accounting principles, practices or methods, other than as may be
required by U.S. GAAP as concurred in by Bay's independent auditors.

                 (i)  Contracts.  Except in the ordinary course of business,
enter into or terminate any material contract, agreement or lease, or amend
or modify in a material respect any of its existing material contracts,
agreements or leases (including, without limitation, any material licensing
agreement).

                 (j)  Claims.  Except in the ordinary course of business,
settle any claim, action or proceeding involving money damages in excess of
$500,000 in the aggregate.

                 (k)  Adverse Actions.  (i) Take any action while knowing
that such action would, or is reasonably likely to, prevent or impede the
Merger from qualifying as a reorganization within the meaning of Section
368(a) of the Code; or (ii) knowingly take any action that is intended or is
reasonably likely to result in (A) any of its representations and warranties
set forth in this Agreement being or becoming untrue (subject to the standard
set forth in Section 5.02) at any time at or prior to the Effective Time, (B)
except as otherwise permitted by Section 6.06, any of the conditions to the
Merger set forth in Article VII not being satisfied or not being satisfied as
quickly as would otherwise be the case or (C) a violation of any provision of
this Agreement except, in each case, as may be required by applicable law.

                 (l)  Incurrence of Indebtedness.  Other than (i) short-term
indebtedness incurred in the ordinary course of business consistent with past
practice but in no event to exceed an aggregate of $10 million of short-term
debt and (ii) indebtedness of Bay or any of its Subsidiaries to Bay or any of
its Subsidiaries, incur any indebtedness for borrowed money, assume,
guarantee, endorse or otherwise as an accommodation become responsible for
the obligations of any other individual, corporation or other entity, or make
any loan or advance.
<PAGE>
                 (m)  Capital Expenditures.  Make any capital expenditures in
excess of $35 million in the aggregate in any quarter of the year.

                 (n)  Confidentiality Agreements.  Subject to Section 6.06,
waive any confidentiality or "standstill" provisions entered into with any
third party in connection with its consideration of an Acquisition Proposal.

                 (o)  Agreements.  Agree or commit to do anything prohibited
by the above paragraphs (a) through (n).

                 4.02.  Forbearances of Nortel.  From the date hereof until
the Effective Time, except as expressly contemplated by this Agreement or as
set forth in Section 4.02 of Nortel's Disclosure Schedule, without the prior
written consent of Bay, Nortel will not, and will cause each of its
Subsidiaries not to:

                 (a)  Dividends, Etc.  (i)  Make, declare, pay or set aside
for payment any extraordinary dividend on or in respect of, or declare or
make any distribution on any shares of its capital stock or (ii) except to
the extent required to do so under its existing Plans or pursuant to the
rights, privileges, restrictions and conditions attaching to any series of
the Class A Preferred Shares of Nortel, directly or indirectly adjust, split,
combine, redeem, reclassify, purchase or otherwise acquire, any shares of its
capital stock.

                 (b)  Acquisitions and Dispositions.  (i) Make any sale,
transfer or other disposition (collectively, the "Dispositions") of Nortel's
direct or indirect assets, business or properties for consideration that is
in the aggregate with all other such Dispositions in excess of $3.5 billion;
or (ii) acquire assets, businesses or properties (collectively, the
"Acquisitions") for consideration that is in aggregate in excess of $3.5
billion.  Notwithstanding the foregoing, any Acquisition or Disposition that
involves the contribution of operating assets (excluding, for the sake of
clarity, cash, marketable securities and Nortel Common Stock) by Nortel or
its Subsidiaries to a new entity with respect to which Nortel or its
Subsidiaries has at least a 50% ownership interest, shall expressly be
permitted and the amount of such contribution shall not be taken into account
for purposes of calculating the dollar limitation on Dispositions and
Acquisitions described above.

                 (c)  Adverse Actions.  (i) Take any action while knowing
that such action would, or is reasonably likely to, prevent or impede the
Merger from qualifying as a reorganization within the meaning of Section
368(a) of the Code; or (ii) knowingly take any action that is intended or is
reasonably likely to result in (A) any of its representations and warranties
set forth in this Agreement being or becoming untrue (subject to the standard
set forth in Section 5.02) at any time at or prior to the Effective Time, (B)
any of the conditions to the Merger set forth in Article VII not being
satisfied or not being satisfied as quickly as would otherwise be the case or
(C) a violation of any provision of this Agreement except, in each case, as
may be required by applicable law.

                 (d)  Agreements.  Agree or commit to do anything prohibited
by the above paragraphs (a) through (c).
<PAGE>
                                   ARTICLE V

                        REPRESENTATIONS AND WARRANTIES

                 5.01.  Disclosure Schedules.  At or prior to the execution
hereof, Bay has delivered to Nortel and Nortel has delivered to Bay a
schedule (respectively, its "Disclosure Schedule") setting forth, among other
things, items the disclosure of which is necessary or appropriate either in
response to an express disclosure requirement contained in a provision hereof
or as an exception to one or more representations or warranties contained in
Section 5.03 and 5.04 or to one or more of its covenants contained in Article
IV; provided, that (i) no such item is required to be set forth in a
Disclosure Schedule as an exception to a representation or warranty if its
absence does not result in the related representation or warranty being
deemed untrue or incorrect under the standard established by Section 5.02,
and (ii) the mere inclusion of an item in a Disclosure Schedule as an
exception to a representation or warranty shall not be deemed an admission by
a party that such item represents a material exception or fact, event or
circumstance or that such item is reasonably likely to result in a Material
Adverse Effect.

                 5.02.  Standard.  No representation or warranty (i) of Bay
contained in Section 5.03 (other than Sections 5.03(b), 5.03(f)(ii), 5.03(m)
and 5.03(w)) or (ii) of Nortel contained in Section 5.04 (other than Sections
5.04(b) and 5.04(k)) shall be deemed untrue or incorrect, and no party hereto
shall be deemed to have breached a representation or warranty, as a
consequence of the existence of any fact, event or circumstance unless such
fact, circumstance or event, individually or taken together with all other
facts, events or circumstances inconsistent with such representation or
warranty contained in Section 5.03 or Section 5.04 respectively has had or is
reasonably likely to have a Material Adverse Effect; provided, that (x)
Sections 5.03(b), 5.03(f)(ii), and 5.03(m) shall be deemed untrue, and Bay
shall have breached such representations and warranties, if such Sections are
not true in all material respects and (y) Section 5.04(b) shall be deemed
untrue, and Nortel shall have breached such representation and warranty, if
such Section is not true in all material respects.

                 5.03.  Representations and Warranties of Bay.  Subject to
Sections 5.01 and 5.02 and except as Previously Disclosed, Bay hereby
represents and warrants to Nortel and Sub as follows:

                 (a)  Organization, Standing and Authority.  It is a
corporation duly organized, validly existing and in good standing under the
laws of the jurisdiction of its organization.  It is duly qualified to do
business and is in good standing in the states of the United States and
foreign jurisdictions where its ownership or leasing of property or assets or
the conduct of its business requires it to be so qualified.  It has in effect
all federal, state, local and foreign governmental authorizations necessary
for it to own or lease its properties and assets and to carry on its business
as it is now conducted.  Bay has made available to Nortel a complete and
correct copy of its certificate of incorporation and by-laws, each as amended
and in full force and effect as of the date of this Agreement.

                 (b)  Shares.

                 (i)  The authorized capital stock of Bay consists of (A)
400,000,000 shares of Bay Common Stock, of which 223,037,814 shares were
<PAGE>
outstanding as of June 1, 1998 and (B) 1,000,000 shares of preferred stock,
par value $0.001 per share ("Bay Preferred Stock"), of which no shares are
outstanding and 500,000 shares of which have been designated Series A
Preferred Stock ("Bay Series A Preferred Stock") and reserved for issuance
upon exercise of the rights (the "Bay Rights") distributed to the holders of
Bay Common Stock pursuant to a Rights Agreement dated as of February 7, 1995,
between Bay and The First National Bank of Boston, as Rights Agent, as
amended (the "Bay Rights Agreement").  Since June 1, 1998 to the date of this
Agreement, there have been no issuances of shares of the capital stock of Bay
or any other securities of Bay other than issuances of shares pursuant to
Rights outstanding as of June 1, 1998 under the Bay Plans.

                 (ii)  All issued and outstanding shares of Bay Common Stock
have been duly authorized, validly issued, fully paid and nonassessable, and
no class of capital stock of Bay is entitled to preemptive rights.

                 (iii)  There were outstanding as of June 1, 1998 no Rights
to acquire capital stock from Bay other than (A) the Bay Rights, (B) Bay
Stock Options representing in the aggregate the right to purchase 34,472,651
shares of Bay Common Stock, (C) Rights granted in connection with Bay's
1994 Employee Stock Purchase Plan or 1998 Employee Stock Purchase Plan and 
(D) Rights to acquire shares of Bay Common Stock upon conversion of notes 
issued under the Indenture. Other than in connection with the Option Agreement 
and other than the associated Bay Rights issued with the shares issued as 
described above, no Rights to acquire capital stock from Bay have been issued 
or granted since June 1, 1998 to the date of this Agreement.

                 (c)  Subsidiaries.  (i)  Section 5.03(c)(i) of the Bay
Disclosure Schedule sets forth a list as of the date hereof of all of Bay's
Subsidiaries, together with their jurisdiction of organization. Unless
otherwise described therein, Bay owns, directly or indirectly, beneficially
and of record 100% of the issued and outstanding voting securities of each
such Subsidiary (other than directors' qualifying shares, if any). No equity
securities of any of Bay's Significant Subsidiaries are or may become
required to be issued (other than to Bay or its Subsidiaries) by reason of
any Rights and there are no contracts, commitments, understandings or
arrangements by which any of such Significant Subsidiaries is bound to sell
or otherwise transfer any shares of capital stock of any such Significant
Subsidiaries (other than to Bay or its Subsidiaries). In addition, Section
5.03(c)(i) of the Bay Disclosure Schedule lists as of the date hereof, each 
corporation, partnership, limited liability company or similar entity with 
respect to which, as of the date of this Agreement, Bay or any Subsidiary of 
Bay owns more than 5% but less than a majority of the voting equity or similar 
voting interest or any interest convertible into, or exchangeable or exercisable
for, more than 5% but less than a majority of the voting equity or similar
voting interest and which interest is carried on Bay's most recent financial
statements (or if not held as of the date thereof, would be carried on the
Bay's financial statements if prepared as of the date hereof) at a value in
excess of $10,000,000 (collectively, the "Bay Equity Interests").  All of the
shares of capital stock of each of the Significant Subsidiaries of Bay and
all the Bay Equity Interests held by Bay and each Subsidiary of Bay are fully
paid and nonassessable and are owned by Bay or such Subsidiary free and clear
of any Liens.  There are no material outstanding contractual obligations of
Bay or any of its Subsidiaries to provide funds to, or make any investment
(in the form of a loan, capital contribution or otherwise) in any entity in
which Bay or any Subsidiary of Bay owns a Bay Equity Interest, except such
obligations as would not require any investment or provision of funds or
<PAGE>
assets in an amount or having a fair market value in excess of $2,500,000 for
any such investment or $10,000,000 in the aggregate for all such investments.

                 (ii)  Each of Bay's Significant Subsidiaries has been duly
organized and is validly existing in good standing under the laws of the
jurisdiction of its organization, and is duly qualified to do business and in
good standing in the jurisdictions where its ownership or leasing of property
or the conduct of its business requires it to be so qualified.  Each of such
Significant Subsidiaries has in effect all federal, state, local and foreign
governmental authorizations necessary for it to own or lease its properties
and assets and to carry on its business as it is now conducted.

                 (d)  Corporate Power.  Bay and each of its Significant
Subsidiaries has the corporate power and authority to carry on its business
as it is now being conducted and to own all its properties and assets; and it
has the corporate power and authority to execute, deliver and perform its
obligations under this Agreement and the Option Agreement and to consummate
the transactions contemplated hereby and thereby.

                 (e)  Corporate Authority.  (i) Subject, in the case of the
consummation of the Merger, to receipt of the requisite approval and adoption
of the "agreement of merger" (as such term is used in Section 251 of the
DGCL) contained in this Agreement and the Merger by the holders of a majority
of the outstanding shares of Bay Common Stock entitled to vote thereon, this
Agreement, the Option Agreement and the transactions contemplated hereby and
thereby have been authorized by all necessary corporate action of Bay and the
Bay Board (assuming that neither Nortel or Sub is an "interested stockholder"
of Bay under Section 203 of the DGCL immediately before the execution and
delivery of this Agreement).

                 (ii)  This Agreement and the Option Agreement are legal,
valid and binding agreements of Bay, enforceable in accordance with their
terms (except as such enforceability may be limited by applicable bankruptcy,
insolvency, reorganization, moratorium, fraudulent transfer and similar laws
of general applicability relating to or affecting creditors' rights or by
general equity principles).  

                 (f)  No Defaults.  Subject to receipt of the regulatory
approvals, and expiration of the waiting periods, referred to in Section
5.03(r) and required filings under federal and state securities or other
laws, the execution, delivery and performance of this Agreement and the
Option Agreement and the consummation of the transactions contemplated hereby
and thereby by Bay do not and will not (i) constitute a breach or violation
of, or a default under, any law, rule or regulation or any judgment, decree,
order, governmental permit or license, or agreement, indenture or instrument
of Bay or of any of its Subsidiaries or to which Bay or any of its
Subsidiaries or any of their respective properties or assets are subject or
bound, (ii) constitute a breach or violation of, or a default under, its
articles or certificate of incorporation or by-laws, or (iii) require any
consent or approval under any such law, rule, regulation, judgment, decree,
order, governmental permit or license, agreement, indenture or instrument.

                 (g)  Financial Reports and SEC Documents.  (i)  Its Annual
Reports on Form 10-K for the fiscal years ended June 30, 1995, 1996 and 1997,
its Quarterly Reports on Form 10-Q for the periods ended September 27, 1997,
December 27, 1997 and March 28, 1998, and all other reports, registration
statements, definitive proxy statements or information statements filed or to
<PAGE>
be filed by it or any of its Subsidiaries subsequent to June 30, 1995 under
the Securities Act, or under Sections 13(a), 13(c), 14 or 15(d) of the
Exchange Act, in the form filed, or to be filed (collectively, the "Bay SEC
Documents"), with the SEC, as of the date filed (or, with respect to (x) a
document filed prior to the date of this Agreement and amended or superseded
by a filing prior to the date of this Agreement or (y) a document filed after
the date of this Agreement and amended or superseded by a filing after the
date of this Agreement, then in the case of each of (x) and (y), on the date
of such filing as so amended or superseded) (A) complied or will comply in
all material respects as to form with the applicable requirements under the
Securities Act or the Exchange Act, as the case may be; and (B) did not and
will 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; and each of the balance sheets contained in or incorporated
by reference into any such Bay SEC Document (including the related notes and
schedules thereto) fairly presents and will fairly present the financial
position of the entity or entities to which it relates as of its date, and
each of the statements of income and changes in stockholders' equity and cash
flows or equivalent statements in such Bay SEC Documents (including any
related notes and schedules thereto) fairly presents and will fairly present
the results of operations, changes in stockholders' equity and changes in
cash flows, as the case may be, of the entity or entities to which it relates
for the periods to which they relate, in each case in accordance with U.S.
GAAP consistently applied during the periods involved, except in each case as
may be noted therein, subject to normal year-end audit adjustments in the
case of unaudited statements.

                 (ii)  Except as set forth in the Bay SEC Documents filed
since March 28, 1998 and prior to the date of this Agreement (the "Bay Filed
SEC Documents") since March 28, 1998, Bay has not incurred any liabilities
(whether absolute, accrued, contingent or otherwise) that are of a nature
that would be required to be disclosed on a balance sheet of Bay or the
footnotes related thereto prepared in conformity with U.S. GAAP, other than
liabilities incurred in the ordinary course of business.

                 (h)  Litigation.  Except as disclosed in the Bay Filed SEC
Documents, as of the date of this Agreement no litigation, claim or other
proceeding before any court or governmental agency is pending against Bay or
any of its Subsidiaries and, to its Knowledge, no such litigation, claim or
other proceeding has been threatened.

                 (i)  Compliance with Laws.  Bay and each of its
Subsidiaries:

                 (i)  is in compliance with all applicable federal, state,
local and foreign statutes, laws, regulations, ordinances, rules, judgments,
orders or decrees applicable thereto or to the employees conducting such
businesses;

                 (ii)  has all permits, licenses, authorizations, orders and
approvals of, and has made all filings, applications and registrations with,
all Governmental Authorities that are required in order to permit them to
conduct their businesses substantially as presently conducted; all such
permits, licenses, certificates of authority, orders and approvals are in
full force and effect and, to its Knowledge, no suspension or cancellation of
any of them is threatened; and 
<PAGE>
                 (iii)  has received, since June 30, 1997, and prior to the
date of this Agreement, no written notification or communication from any
Governmental Authority (A) asserting that Bay or any of its Subsidiaries is
not in compliance with any of the statutes, regulations or ordinances which
such Governmental Authority enforces or (B) threatening to revoke any
license, franchise, permit or governmental authorization (nor, to Bay's
Knowledge, do any grounds for any of the foregoing exist).

                 (j)  Material Contracts; Defaults.  Except for this
Agreement, the Option Agreement and those agreements and other documents
filed as exhibits to the Bay Filed SEC Documents, as of the date of this
Agreement, neither Bay nor any of its Subsidiaries is a party to or bound by
(i) any "material contract" within the meaning of Item 601(b)(10) of the
SEC's Regulation S-K or (ii) any non-competition agreement or other agreement
or arrangement that materially restricts it or any of its Subsidiaries from
competing in any line of business.  Neither it nor any of its Subsidiaries is
in default under any material contract, agreement, commitment, arrangement,
lease, insurance policy or other instrument to which it is a party, by which
its respective assets, business, or operations may be bound or affected, and
there has not occurred any event that, with the lapse of time or the giving
of notice or both, would constitute such a default.

                 (k)  No Brokers.  No action has been taken by it that would
give rise to any valid claim against any party hereto for a brokerage
commission, finder's fee or other like payment with respect to the
transactions contemplated by this Agreement, excluding fees to be paid to
Morgan Stanley & Co. Incorporated (the "Bay Financial Advisor") pursuant to
Bay's agreement with such firm.

                 (l)      Employee Benefits; Employee Relations.  (i) A
complete and correct list as of the date of the Agreement of each material
plan, program, arrangement, agreement or commitment, not otherwise disclosed
in publicly available documents which is an employment, consulting,
termination or deferred compensation agreement providing for compensation in
any one year in excess of $250,000 (other than consulting agreements with
dealers and sales agency agreements, in each case entered into in the
ordinary course of business), or an executive compensation, incentive bonus
or other bonus, employee pension, profit-sharing, savings, retirement, stock
option, stock purchase, severance pay, life, health, disability or accident
insurance plan, or vacation, or other employee benefit plan, program,
arrangement, agreement or commitment, including any "employee benefit plan,"
within the meaning of Section 3(3) of the Employee Retirement Income Security
Act of 1974, as amended ("ERISA"), currently maintained, sponsored, or
contributed to by Bay or any of its Subsidiaries in respect of employees in
the United States or to which Bay or any such Subsidiary has any obligation
to contribute, or with respect to which Bay or any of its Subsidiaries may
have any material liability in respect of employees in the United States
(each a "Plan" and, collectively, the "Plans") will be provided within ten
Business Days following the Effective Time.  Such list shall not be deemed to
be a schedule to this Agreement and shall not have any effect hereunder,
except that Bay's delivery of the list shall satisfy Bay's obligation under
this paragraph (i).

                 (ii)     Neither Bay nor any Subsidiary of Bay has
disseminated in writing or otherwise broadly or generally notified employees
of any intent or commitment (whether or not legally binding) to create any
additional Plan or to amend, modify or terminate any existing Plan which
<PAGE>
would be reasonably expected to result in material liabilities to Bay and its
Subsidiaries, except as may be contemplated by Section 6.13 of this
Agreement.

                 (iii)    With respect to the Plans of Bay, except as would
not have a Material Adverse Effect on Bay, each Plan of Bay (A) has been
administered and is in compliance with the terms of such plan and all
applicable laws, rules and regulations (including, without limitation, ERISA,
the Code (including the qualification rules of Section 401 of the Code for
Plans that are intended to be qualified) and any regulations thereunder) and
(B) no governmental audits, actions, suits or claims (other than routine
claims for benefits in the ordinary course) are pending or, to the Knowledge
of Bay, threatened.

                 (iv)     Neither Bay nor any Subsidiary, contributes to or
has any liability with respect to a multiemployer plan within the meaning of
Section 4001(a)(3) of ERISA or any other pension plan subject to Title IV of
ERISA or is any party to any collective bargaining agreement.  

                 (v)      Except as would not have a Material Adverse Effect
on Bay: (A) there is no pending or, to the Knowledge of Bay, threatened labor
dispute, strike or work stoppage against Bay or any of its Subsidiaries which
may interfere with the respective business activities of Bay or any of its
Subsidiaries and (B) to the Knowledge of Bay, neither Bay nor any of its
Subsidiaries, nor their respective businesses of Bay or any of its
Subsidiaries, has committed any unfair labor practices or violated any
applicable employment laws in connection with the operation of the respective
businesses of Bay or any of its Subsidiaries, and there is no pending or
threatened charge or complaint against Bay or any of its Subsidiaries by the
National Labor Relations Board or any comparable state agency, or by any
employee or class of employees or governmental agency relating to a purported
violation of any applicable employment laws.

                 (m)  Takeover Laws.  The approval of this Agreement and the
Merger and the Option Agreement by the Bay Board (i) constitutes approval of
this Agreement and the Merger and the Option Agreement and the transactions
contemplated hereby and thereby for purposes of Section 203 of the DGCL and
(ii) renders inapplicable Article Thirteenth of the Bay Certificate.  To the
Knowledge of Bay, except for Section 203 of the DGCL (which has been rendered
inapplicable), no "moratorium", "control share", "fair price" or other
antitakeover laws and regulations of any state (collectively, "Takeover
Laws") are applicable to the Merger or the other transactions contemplated by
this Agreement and the Option Agreement.

                 (n)  Rights Agreement.  The Bay Board has approved an
amendment (substantially in the form provided to Nortel) to the Bay Rights
Agreement to the effect that none of Nortel, Sub or any of their respective
affiliates shall become an "Acquiring Person", and that no "Stock Acquisition
Date" or "Distribution Date" (as such terms are defined in the Bay Rights
Agreement) will occur as a result of the approval, execution or delivery of
this Agreement or the Option Agreement or the consummation of the
transactions contemplated hereby or thereby.  The Bay Rights Agreement shall
terminate and be of no further effect upon the Effective Time, without any
consideration being payable with respect to outstanding Bay Rights
thereunder.

                 (o)  Environmental Matters.  (i)  As used in this Agreement,
"Environmental Laws" means all applicable local, state and federal
<PAGE>
environmental, health and safety laws (including common law) and regulations
in effect on the date of this Agreement, relating to the protection of human
health and safety as affected by exposure to pollutants, contaminants, or
hazardous or toxic wastes, substances or materials and to the protection of
the environment including, without limitation, the Resource Conservation and
Recovery Act, the Comprehensive Environmental Response, Compensation, and
Liability Act, the Clean Water Act, the Federal Clean Air Act, and the
Occupational Safety and Health Act, each as amended, regulations promulgated
thereunder, and state counterparts.

                 (ii)  Neither the conduct nor operation of it nor its
Subsidiaries nor any condition of any property presently or previously owned,
leased or operated by any of them violates or, within the applicable statute
or limitations period, violated Environmental Laws and to the Knowledge of
Bay no condition has existed or event has occurred with respect to any of
them or any such property that is reasonably likely to result in material
liability of Bay and its Subsidiaries taken as a whole under Environmental
Laws.  Neither it nor any of its Subsidiaries has received any written notice
from any person or entity that it or its Subsidiaries or the operation or
condition of any property ever owned, leased, operated, held as collateral or
held as a fiduciary by any of them are or were in violation of or otherwise
are alleged to have liability under any Environmental Law, including, but not
limited to, responsibility (or potential responsibility) for the cleanup or
other remediation of any pollutants, contaminants, or hazardous or toxic
wastes, substances or materials at, on, beneath, or originating from any such
property.

                 (iii)  To the Knowledge of Bay, none of the property
currently owned, leased or operated by Bay or by its Subsidiaries is subject
to, or as a result of this transaction would be subject to, (i) the New
Jersey Industrial Site Recovery Act or any other state or local Environmental
Laws which would impose restrictions, such as notice, disclosure or obtaining
advance approval prior to this transaction, or (ii) any liens under any
Environmental Laws.

                 (p)  Intellectual Property.  (i) Bay and its Subsidiaries
are licensed or otherwise possess sufficient rights to use all material
Intellectual Property Rights currently used in the business of Bay or its
Subsidiaries or necessary to conduct the business of Bay and its Subsidiaries
as currently conducted, including material third party Intellectual Property
Rights which are used in the manufacture of, incorporated in, or form a part
of any product of Bay or any of its Subsidiaries (the "Bay Intellectual
Property Rights").

                 (ii)  Section 5.03(p)(ii) of the Bay Disclosure Schedule
contains an accurate and complete list as of the date of this Agreement of
all licenses and agreements under which Bay and its Subsidiaries are licensed
to use third party Intellectual Property Rights which are material to the
business of Bay as currently conducted.

                 (iii)  Except as set forth in Section 5.03(p) of the Bay
Disclosure Schedule, Bay and its Subsidiaries are not required to pay any
royalties, fees or other amounts to any Person in connection with the use or
exploitation of the Bay Intellectual Property Rights or the development,
manufacture or commercial exploitation of any products of Bay or its
Subsidiaries in each such case in excess of $1 million per annum.
<PAGE>
                 (iv)  Section 5.03(p)(iv) of the Bay Disclosure Schedule
contains an accurate and complete list as of the date of this Agreement of
all registered patents, registered trademarks, trade names, registered
service marks and registered copyrights (in each case that are currently in
use), as well as all applications for any and all of the foregoing, included
in the Bay Intellectual Property Rights (excluding third party Intellectual
Property Rights), including the jurisdiction in which each such Bay
Intellectual Property Rights has been issued or registered or in which any
such application for such issuance, approval or registration has been filed. 
All registered patents, registered trademarks, trade names, registered
service marks and registered copyrights owned by Bay and which are material
to the conduct of Bay's business as currently conducted are valid and
enforceable.

                 (v)  Section 5.03(p)(v) of the Bay Disclosure Schedule
contains an accurate and complete list as of the date of this Agreement of
all licenses and sublicenses under which Bay has granted the right to
manufacture, reproduce, market or exploit any material products of Bay or its
Subsidiaries or any material adaptation, derivative or reformulation based on
any such product or any portion thereof.

                 (vi)  Neither Bay nor its Subsidiaries is or will be as a
result of the execution and delivery of this Agreement or the performance of
its obligations under this Agreement, in breach of any license, sublicense,
assignment or other agreement to which it is a party giving it a license to
material third party Intellectual Property Rights (the "IP Licenses"). 
Neither the execution or delivery of this Agreement nor the consummation of
the transactions contemplated hereby will cause or will result in a material
change to the terms of any material license, sublicense or other similar
agreement.

                 (vii) Neither Bay nor any of its Subsidiaries (A) has been
sued in any suit, action or proceeding which involves a claim of infringement
or violation of any Intellectual Property Right of any third party or (B) has
received any written claim or allegation that the manufacturing, importation,
marketing, licensing, sale, offer for sale, or use of any of its products
infringes Intellectual Property Rights of any third party.

                 (viii)  Bay and its Subsidiaries have taken all reasonable
steps to protect and preserve the confidential information, trade secrets and
know-how of Bay and its Subsidiaries, including appropriate non-disclosure
agreements with all employees and third persons having access to any
confidential information, trade secrets or know-how of Bay and its
Subsidiaries.

                 (ix)  Neither Bay nor any of its Subsidiaries has made any
written claim or allegation that any third person is or has infringed,
misappropriated, breached or violated the rights of Bay or its Subsidiaries
in any of the Bay Intellectual Property Rights which are material to the
business of Bay as currently conducted.

                 (q)  Tax Matters.  (i)(A) All returns, declarations,
reports, estimates, information returns and statements required to be filed
on or before the Effective Date under federal, state, local or any foreign
tax laws ("Tax Returns") with respect to it or any of its Subsidiaries, have
been or will be timely filed, or requests for extensions have been timely
filed and have not expired; (B) all material Tax Returns filed by it are
<PAGE>
complete and accurate in all material respects; (C) all Taxes shown to be due
and payable (without regard to whether such Taxes have been assessed) on such
Tax Returns have been paid or adequate reserves have been established for the
payment of such Taxes; and (D) no material (1) audit or examination or (2)
refund litigation with respect to any Tax Return is pending.

                 (ii)  It has no reason to believe that any conditions exist
that might prevent or impede the Merger from qualifying as a reorganization
within the meaning of Section 368(a) of the Code.

                 (r)  Regulatory Approvals.  No consents or approvals of, or
filings or registrations with, any Governmental Authority or instrumentality
are necessary to consummate the Merger except (i) as may be required under,
and other applicable requirements of, the Hart-Scott Rodino Antitrust
Improvements Act of 1976, as amended (the "HSR Act"), the Competition Act
(Canada) and antitrust or other competition laws of other jurisdictions,
(ii) as may be required by the by-laws, rules, regulations or policies of the
NYSE and the Canadian Stock Exchanges in respect of the Nortel Common Stock
to be issued in the Merger and upon exercise of the Bay Stock Options to be
assumed by Nortel by reason of the Merger and the listing of such Nortel
Common Stock on such stock exchanges; (iii) the filing with the SEC of the
Bay Proxy Statement in definitive form and the filing and declaration of
effectiveness of the Registration Statement; (iv) the filing of a certificate
of merger with the Secretary of State of the State of Delaware pursuant to
the DGCL; (v) such filings as are required to be made or approvals as are
required to be obtained under the securities or "Blue Sky" laws of various
states in connection with the issuance of Nortel Common Stock in the Merger;
(vi) such filings as are required to be made and exemption rulings or orders
as are required to be obtained under the Canada Business Corporations Act and
Canadian securities laws; and (vii) as may be required under Section 721 of
the U.S. Defense Production Act of 1950, as amended, and the rules
promulgated thereunder ("Exon-Florio") and the rules and regulations
promulgated by the U.S. Department of Defense.

                 (s)  Fairness Opinion.  On or before the date hereof, the
Bay Financial Advisor has delivered its opinion to the Bay Board that the
Exchange Ratio is fair, from a financial point of view, to the holders of Bay
Common Stock.

                 (t)  Year 2000.  All internal computer systems that are
material to the business, finances or operations of Bay ("Material Systems")
are (i) able to receive, record, store, process, calculate, manipulate and
output dates from and after January 1, 2000, time periods that include
January 1, 2000 and information that is dependent on or relates to such dates
or time periods, in the same manner and with the same accuracy,
functionality, data integrity and performance as when dates or time periods
prior to January 1, 2000 are involved and (ii) able to store and output date
information in a manner that is unambiguous as to century ("Year 2000
Compliant") or can be freely modified to be made Year 2000 Compliant without
breaching any third party license agreements or otherwise infringing any
intellectual property rights of any third party.  All Material Systems that
are not Year 2000 Compliant as of the date of this Agreement are set forth in
Section 5.03(t) of the Bay Disclosure Schedule.

                 (w)  No Material Adverse Effect.  Except as permitted by
Nortel pursuant to Section 4.01, since June 30, 1997, (i) Bay and its
Subsidiaries have conducted their respective businesses in the ordinary
<PAGE>
course (excluding (x) the incurrence of liabilities related to this Agreement
and the transactions contemplated hereby and (y) discussions with third
parties with respect to any potential Acquisition Proposal) and (ii) no event
has occurred or circumstance arisen that, individually or taken together with
all other facts, circumstances and events (described in any paragraph of
Section 5.03 or otherwise), has had or is reasonably likely to have a
Material Adverse Effect with respect to it.

                 5.04.  Representations and Warranties of Nortel and Sub. 
Subject to Sections 5.01 and 5.02 and except as Previously Disclosed, Nortel
and Sub hereby represent and warrant to Bay as follows:

                 (a)  Organization, Standing and Authority.  Each of Nortel
and Sub is a corporation duly organized, validly existing and, in the case of
Sub, in good standing under the laws of the jurisdiction of its organization. 
Each of Nortel and Sub is duly qualified to do business and, as applicable,
is in good standing in the provinces of Canada and in the states of the
United States and foreign jurisdictions where its ownership or leasing of
property or assets or the conduct of its business requires it to be so
qualified. Each of Nortel and Sub has in effect all federal, provincial,
state, local and foreign governmental authorizations necessary for it to own
or lease its properties and assets and to carry on its business as it is now
conducted.  Each of Nortel and Sub has made available to Bay a complete and
correct copy of its constitutive documents, each as amended to date and in
full force and effect.

                 (b)  Shares.  (i)  As of the date hereof, the authorized
capital stock of Nortel consists solely of (A) an unlimited number of shares
of Nortel Common Stock, of which 527,860,165 shares were outstanding as of
May 31, 1998; (B) an unlimited number of Class A Preferred Shares issuable in
series, without nominal or par value, of which 200 Cumulative Redeemable
Class A Preferred Shares Series 4 (which are exchangeable at certain times,
and subject to certain conditions, into shares of Nortel Common Stock),
16,000,000 Cumulative Redeemable Class A Preferred Shares Series 5 (which are
convertible at certain times, and subject to certain conditions, into an
equal number of Cumulative Redeemable Class A Preferred Shares Series 6) and
14,000,000 Non-cumulative Redeemable Class A Preferred Shares Series 7 (which
are convertible at certain times, and subject to certain conditions, into an
equal number of Non-cumulative Redeemable Class A Preferred Shares Series 8)
were outstanding as of May 31, 1998; and (C) an unlimited number of Class B
Preferred Shares, issuable in series, without nominal or par value, of which
no shares were outstanding as of May 31, 1998.

                 (ii)  The authorized capital stock of Sub consists of one
share of common stock, $0.01 per share, of which one share is outstanding. 
All of the Sub Common Stock is owned directly by Nortel.  Sub has not
conducted any business prior to the date hereof and has no Subsidiaries and
no assets, liabilities or obligations of any nature other than incident to
its formation and incident to this Agreement.

                 (iii)  The outstanding shares of Nortel's and Sub's capital
stock have been duly authorized and are validly issued and outstanding, fully
paid and nonassessable, and subject to no preemptive rights (and were not
issued in violation of any preemptive rights).  As of the date hereof, there
are no shares of capital stock of Nortel or Sub authorized and reserved for
issuance, neither Nortel nor Sub has any Rights issued or outstanding with
respect to its capital stock, and neither Nortel nor Sub has any commitment
<PAGE>
to authorize, issue or sell any such shares or Rights, except pursuant to
this Agreement.  From March 31, 1998 to the date of this Agreement, Nortel
has issued no shares of its capital stock or Rights or reserved any shares
for such purposes.

                 (iv)  The shares of Nortel Common Stock to be issued in
exchange for shares of Bay Common Stock in the Merger or upon exercise of Bay
Stock Options to be assumed by Nortel by reason of the Merger, when issued
will be duly authorized, validly issued, fully paid and nonassessable and
will not have been issued in violation of any subscriptive or preemptive
rights.

                 (c)  Subsidiaries.  (i)  (A) Nortel has Previously Disclosed
a list of all of its Significant Subsidiaries together with the jurisdiction
of organization of each such Subsidiary, (B) Nortel owns, directly or
indirectly, all of the issued and outstanding capital stock of each of its
Significant Subsidiaries, (C) no equity securities of any of its Significant
Subsidiaries are or may become required to be issued (other than to it or its
Subsidiaries) by reason of any Rights, (D) there are no contracts,
commitments, understandings or arrangements by which any of such Significant
Subsidiaries is or may be bound to sell or otherwise transfer any shares of
the capital stock of any such Significant Subsidiaries (other than to it or
its Subsidiaries), (E) there are no contracts, commitments, understandings,
or arrangements relating to its rights to vote or to dispose of such shares
(other than to it or its Subsidiaries) and (F) all of the shares of capital
stock of each such Significant Subsidiary held by it or its Subsidiaries are
fully paid and nonassessable and are owned by it or its Subsidiaries free and
clear of any Liens.

                 (ii)  Each of Nortel's Significant Subsidiaries has been
duly organized and is validly existing in good standing, as applicable, under
the laws of the jurisdiction of its organization, and is duly qualified to do
business and, as applicable, is in good standing in the jurisdictions where
its ownership or leasing of property or the conduct of its business requires
it to be so qualified.  Each of such Significant Subsidiaries has in effect
all federal, state, provincial, local and foreign governmental authorizations
necessary for it to own or lease its properties and assets and to carry on
its business as it is now conducted.

                 (d)  Corporate Power.  Nortel, Sub and each of Nortel's
Significant Subsidiaries has the corporate power and authority to carry on
its business as it is now being conducted and to own all its properties and
assets; and each of Nortel and Sub has the corporate power and authority to
execute, deliver and perform its obligations under this Agreement and, in the
case of Nortel, the Option Agreement and to consummate the transactions
contemplated hereby and, in the case of Nortel, thereby.

                 (e)  Corporate Authority.  (A) This Agreement and the
transactions contemplated hereby, including the issuance of Nortel Common
Stock in the Merger or upon the exercise of Bay Stock Options to be assumed
by Nortel by reason of the Merger, and the Option Agreement and the
transactions contemplated thereby, as applicable, have been authorized and
approved by all necessary corporate action of Nortel (including all necessary
shareholder approvals, if any), Sub, the Nortel Board and the Board of
Directors of Sub prior to the date hereof (which action has not been
rescinded or modified in any way) and (B) each of this Agreement and, in the
case of Nortel, the Option Agreement, is a legal, valid and binding agreement
<PAGE>
of each of Nortel and Sub, enforceable in accordance with its terms (except
as such enforceability may be limited by applicable bankruptcy, insolvency,
reorganization, moratorium, fraudulent transfer and similar laws of general
applicability relating to or affecting creditors' rights or by general equity
principles.

                 (f)  No Defaults.  Subject to receipt of the regulatory
approvals, and expiration of the waiting periods, referred to in Section
5.04(j) and required filings under federal, state and provincial securities
laws and the Canada Business Corporations Act, the execution, delivery and
performance of this Agreement and, as applicable, the Option Agreement and
the consummation of the transactions contemplated hereby and, as applicable,
thereby by Nortel and Sub do not and will not (i) constitute a breach or
violation of, or a default under, any law, rule or regulation or any
judgment, decree, order, governmental permit or license, or agreement,
indenture or instrument of Nortel or of any of Nortel's Subsidiaries or to
which it or any of its Subsidiaries or any of their respective properties or
assets are subject or bound, (ii) constitute a breach or violation of, or a
default under, the articles or certificate of incorporation or by-laws of
either Nortel or Sub, or (iii) require any consent or approval under any such
law, rule, regulation, judgment, decree, order, governmental permit or
license, agreement, indenture or instrument.

                 (g)  Financial Reports and SEC Documents.   Nortel's Annual
Reports on Form 10-K for the fiscal years ended December 31, 1995, 1996 and
1997, its Quarterly Report on Form 10-Q for the period ended March 31, 1998,
and all other reports or registration statements, filed or to be filed by it
or any of its Subsidiaries subsequent to December 31, 1995 under the
Securities Act, or under Sections 13(a), 13(c), 14 or 15(d) of the Exchange
Act, in the form filed, or to be filed (collectively, the "Nortel SEC
Documents"), with the SEC, as of the date filed (A) complied or will comply
in all material respects as to form with the applicable requirements under
the Securities Act or the Exchange Act, as the case may be; and (B) did not
and will 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; and each of the balance sheets contained in or incorporated
by reference into any such Nortel SEC Document (including the related notes
and schedules thereto) fairly presents and will fairly present the financial
position of the entity or entities to which it relates as of its date, and
each of the statements of income and changes in stockholders' equity and cash
flows or equivalent statements in such Nortel SEC Documents (including any
related notes and schedules thereto) fairly presents and will fairly present
the results of operations, changes in stockholders' equity and changes in
cash flows, as the case may be, of the entity or entities to which it relates
for the periods to which they relate, in each case in accordance with
Canadian GAAP consistently applied during the periods involved, except in
each case as may be noted therein, subject to normal year-end audit
adjustments in the case of unaudited statements.  The books and records of
Nortel and its Subsidiaries have been, and are being, maintained in all
material respects in accordance with Canadian GAAP and any other applicable
legal and accounting requirements and reflect only actual transactions.

                 (h)  Compliance with Laws.  Nortel and each of its
Subsidiaries:
<PAGE>
                 (i)  is in compliance with all applicable Canadian and U.S.
federal, state, provincial, local and foreign statutes, laws, regulations,
ordinances, rules, judgments, orders or decrees applicable thereto or to the
employees conducting such businesses; and

                 (ii)  has all permits, licenses, authorizations, orders and
approvals of, and has made all filings, applications and registrations with,
all Governmental Authorities that are required in order to permit them to
conduct their businesses substantially as presently conducted; all such
permits, licenses, certificates of authority, orders and approvals are in
full force and effect and, to the best of its knowledge, no suspension or
cancellation of any of them is threatened. 

                 (i)  No Brokers.  No action has been taken by it that would
give rise to any valid claim against any party hereto for a brokerage
commission, finder's fee or other like payment with respect to the
transactions contemplated by this Agreement, excluding fees to be paid to
Deutsche Bank Securities Inc.

                 (j)  Regulatory Approvals.  No consents or approvals of, or
filings or registrations with, any Governmental Authority or with any third
party are necessary to consummate the Merger except for (i) as may be
required under, and other applicable requirements of, the HSR Act and the
Competition Act (Canada), (ii) as may be required by the by-laws, rules,
regulations or policies of the NYSE and the Canadian Stock Exchanges in
respect of the Nortel Common Stock to be issued in the Merger and upon the
exercise of the Bay Stock Options to be assumed by Nortel by reason of the
Merger and the listing of such Nortel Common Stock on such stock exchanges;
(iii) the filing with the SEC of the Bay Proxy Statement in definitive form
and the filing and declaration of effectiveness of the Registration
Statement; (iv) the filing of a certificate of merger with the Secretary of
State of the State of Delaware pursuant to the DGCL; (v) such filings as are
required to be made or approvals as are required to be obtained under the
securities or "Blue Sky" laws of various states in connection with the
issuance of Nortel Common Stock in the Merger; (vi) such filings as are
required to be made and exemption rulings or orders as are required to be
obtained under the Canada Business Corporations Act and Canadian securities
laws; and (vii) as may be required under Exon-Florio and the rules and
regulations promulgated by the U.S. Department of Defense.

                 (k)  No Material Adverse Effect.  Since December 31, 1997,
(i) Nortel and its Subsidiaries have conducted their respective businesses in
the ordinary course (excluding the incurrence of liabilities related to this
Agreement and the transactions contemplated hereby) and (ii) no event has
occurred or circumstance arisen that, individually or taken together with all
other facts, circumstances and events (described in any paragraph of Section
5.04 or otherwise), has had or is reasonably likely to have a Material
Adverse Effect with respect to it.


                                  ARTICLE VI

                                   COVENANTS

                 Bay hereby covenants to and agrees with Nortel, and each of
Nortel and Sub hereby covenants to and agrees with Bay, that:
<PAGE>
                 6.01.  Best Efforts.  Subject to the terms and conditions of
this Agreement, it shall use its best efforts in good faith to take, or cause
to be taken, all actions, and to do, or cause to be done, all things
necessary, proper or desirable, or advisable under applicable laws, so as to
permit consummation of the Merger as promptly as practicable and otherwise to
enable consummation of the transactions contemplated hereby and shall
cooperate fully with the other party hereto to that end.  In case at any time
after the Effective Time any further action is necessary or desirable to
carry out the purpose of this Agreement or to vest the Surviving Corporation
with full title to all properties, assets, rights, approvals, immunities and
franchises of any of the parties to the Merger, the proper officers and
directors of each party to this Agreement and their respective Subsidiaries
shall take all such necessary action as may be reasonably requested by, and
at the sole expense of, Nortel.

                 6.02.  Stockholder Approvals.  Bay shall take, in accordance
with this Agreement, applicable law, applicable stock exchange rules and its
respective certificate of incorporation and by-laws, all action necessary to
convene an appropriate meeting of stockholders of Bay to consider and vote
upon the approval and adoption of the "agreement of merger" (as such term is
used in Section 251 of the DGCL) contained in this Agreement and the Merger
and any other matters required to be approved by Bay's stockholders for
consummation of the Merger (including any adjournment or postponement, the
"Bay Meeting") as promptly as practicable.  The Bay Board, subject to Section
6.06, shall recommend such approval and shall take all reasonable lawful
action to solicit such approval by its stockholders.

                 6.03.  Registration Statement.  (a)  Each of Nortel and Bay
agrees to cooperate in the preparation of a registration statement on Form S-
4 (the "Registration Statement") to be filed by Nortel with the SEC in
connection with the issuance of Nortel Common Stock in the Merger (including
the proxy statement and prospectus and other proxy solicitation materials of
Bay constituting a part thereof (the "Bay Proxy Statement") and all related
documents).  The Registration Statement and the Bay Proxy Statement shall
comply as to form in all material respects with the applicable provisions of
the Securities Act and the Exchange Act and the rules and regulations
thereunder.  Provided the other party has cooperated as required above, Bay
agrees to file the Bay Proxy Statement in preliminary form with the SEC as
promptly as reasonably practicable, and Nortel agrees to file the
Registration Statement with the SEC as soon as reasonably practicable after
any SEC comments with respect to the preliminary Proxy Statement are
resolved.  Each of Nortel and Bay shall, as promptly as practicable after
receipt thereof, provide copies of any written comments received from the SEC
with respect to the Registration Statement and the Bay Proxy Statement, as
the case may be, to the other party, and advise the other party of any oral
comments with respect to the Registration Statement or the Bay Proxy
Statement received from the SEC.  Each of Nortel and Bay agrees to use
reasonable best efforts to cause the Registration Statement to be declared
effective under the Securities Act as promptly as reasonably practicable
after filing thereof.  As promptly as possible after the Registration
Statement is declared effective, Bay agrees to mail the Bay Proxy Statement
to its shareholders.  Nortel also agrees to use reasonable best efforts to
obtain all necessary state securities law or "Blue Sky" permits and approvals
required to carry out the transactions contemplated by this Agreement.  Bay
agrees to furnish to Nortel all information concerning Bay, its Subsidiaries,
officers, directors and stockholders as may be reasonably requested in
connection with the foregoing.
<PAGE>
                 (b)  Each of Nortel and Bay agrees, as to itself and its
Subsidiaries, that none of the information supplied or to be supplied by it
for inclusion or incorporation by reference in (i) the Registration Statement
will, at the time the Registration Statement and each amendment or supplement
thereto, if any, becomes effective under the Securities Act, contain any
untrue statement of a material fact or omit to state any material fact
required to be stated therein or necessary to make the statements therein not
misleading and (ii) the Bay Proxy Statement and any amendment or supplement
thereto will, at the date of mailing to stockholders and at the time of the
Bay Meeting, contain any untrue statement of a material fact or omit to state
any material fact required to be stated therein or necessary to make the
statements therein, in light of the circumstances in which they were made,
not misleading.

                 (c)  Nortel agrees to advise Bay, promptly after Nortel
receives notice thereof, of the time when the Registration Statement has
become effective or any supplement or amendment has been filed, of the
issuance of any stop order or the suspension of the qualification of the
Nortel Common Stock for offering or sale in any jurisdiction, of the
initiation or threat of any proceeding for any such purpose, or of any
request by the SEC for the amendment or supplement of the Registration
Statement or for additional information.

                 (d)  Nortel will use its commercially reasonable best
efforts to obtain, and will provide evidence reasonably satisfactory to Bay,
of all necessary rulings or orders of Canadian securities regulatory
authorities exempting the distribution by Nortel of the shares of Nortel
Common Stock and options to purchase Nortel Common Stock under the Merger and
the resale of Nortel Common Stock issued under the Merger in Canada as
contemplated by this Agreement from the registration and prospectus
requirements under applicable Canadian securities laws on terms reasonably
satisfactory to Nortel and Bay.

                 6.04.  Press Releases.  Nortel and Bay shall use all
reasonable efforts to develop a joint communications plan with respect to the
transactions contemplated hereby.  Notwithstanding the foregoing, neither
Nortel, Sub nor Bay will, without the prior approval of the other party,
issue any press release or written statement for general circulation relating
to the transactions contemplated hereby, except, based on the advice of
counsel, as otherwise required by applicable law or regulation or NYSE rules
or the by-laws, rules, regulations or policies of the Canadian Stock
Exchanges and only after consulting, or using its reasonable best efforts to
consult, with the other party.

                 6.05.  Access; Information.  (a)  Upon reasonable notice and
subject to applicable laws relating to the exchange of information, Nortel
and Bay shall each afford to the officers, employees, counsel, accountants
and other authorized representatives of the other party, reasonable access,
during normal business hours throughout the period prior to the Effective
Date, to all of its properties, books, contracts, commitments and records
and, during such period, it shall furnish promptly to such other party (i) a
copy of each material report, schedule and other document filed by it
pursuant to the requirements of federal or state securities laws, and (ii)
all other information concerning the business, properties and personnel of it
as the other may reasonably request.  Bay shall promptly inform Nortel of any
material litigation, claim or other proceeding before any court or other
governmental authority that arises following the date of this Agreement and
<PAGE>
any material development in any such existing material litigation, claim or
other proceeding.  Neither Nortel nor Bay nor its respective Subsidiaries
shall be required to provide access to or to disclose information where such
access or disclosure would contravene any law, rule, regulation, order,
judgment or decree.  Nortel and Bay shall make appropriate substitute
disclosure arrangements under circumstances in which the restrictions of the
preceding sentence apply.

                 (b)  Subject to the requirements of applicable law, pending
consummation of the Merger, all non-public information provided by Bay to
Nortel and Nortel to Bay pursuant to this Agreement or otherwise will remain
subject to the obligations of Nortel and Bay under the Confidentiality
Agreement.

                 (c)  No investigation by a party, pursuant to this Section
6.05 or otherwise, shall affect or be deemed to modify any representation or
warranty of the other party contained herein.

                 6.06.  Acquisition Proposals.  (a)  Bay shall not, and shall
cause its Subsidiaries and the officers, directors, agents and advisors of
Bay and its Subsidiaries not to, initiate, solicit or encourage inquiries or
proposals with respect to, or engage in any negotiations concerning, or
provide any confidential information to, or have any discussions with, any
person relating to, any Acquisition Proposal.  Notwithstanding the foregoing,
Bay shall be permitted to engage in any discussions or negotiations with, or
provide any information to, any Person in response to a bona fide written
Acquisition Proposal by any such Person, if and only to the extent that in
each such case such proposal was not solicited in violation of this Agreement
and (A) the Bay Meeting shall not have occurred or the Bay Meeting shall have
occurred and the stockholders of Bay shall have failed to approve the matters
required to be approved under Section 7.01; (B) the Bay Board determines in
good faith that such Acquisition Proposal would, if consummated, constitute a
Superior Proposal and is reasonably capable of being consummated; (C) the Bay
Board determines, in good faith after consultation with outside counsel, that
such action is legally advisable for it to act in a manner consistent with
its fiduciary duties under applicable law; and (D) prior to providing any
information or data to any Person or entering into discussions or
negotiations with any Person, Bay receives from such Person an executed
confidentiality agreement containing terms no less restrictive with respect
to such Person than the terms of the Confidentiality Agreement with respect
to Nortel.  Bay shall notify Nortel promptly, but in any event within 24
hours, of such inquiries, proposals, or offers received by, any such
information requested from, or any such discussions or negotiations sought to
be initiated or continued with, any of its representatives indicating, in
connection with such notice, the name of such Person and the material terms
and conditions of any proposals or offers.  For the purposes of this
Agreement, "Superior Proposal" shall mean any bona fide proposal made by a
third party to acquire, directly or indirectly, for consideration consisting
of cash and/or securities, more than 50% of the Bay Common Stock then
outstanding or more than 50% of the consolidated assets of Bay and otherwise
on terms which the Bay Board determines in its good faith judgment (based on
the advice of a financial advisor of nationally recognized reputation) to be
more favorable to the stockholders of Bay than the transactions contemplated
by this Agreement.  Bay shall immediately cease and cause to be terminated
any activities, discussions or negotiations conducted prior to the date of
this Agreement with any parties other than Nortel with respect to any
Acquisition Proposal.  Bay shall endeavor to advise Nortel of any material
<PAGE>
developments with respect to any proposal as to which Bay is exercising its
rights pursuant to the second sentence of this Section 6.06 promptly upon the
occurrence thereof.

                 (b)  Except as set forth in this Section 6.06(b), neither
the Bay Board nor any committee thereof shall (i) withdraw or modify, or
propose to withdraw or modify, in a manner adverse to Nortel, the approval or
recommendation by the Bay Board of the "agreement of merger" (as such term is
used in Section 251 of the DGCL) contained in this Agreement, (ii) approve or
recommend, or propose to approve or recommend, any Acquisition Proposal or
(iii) cause Bay or any of its Subsidiaries to enter into any letter of
intent, agreement in principle, acquisition agreement, merger agreement or
other similar agreement with respect to any Acquisition Proposal. 
Notwithstanding the foregoing, in the event that the Bay Board determines in
good faith, after consultation with outside counsel, that it is legally
advisable to do so in order to act in a manner consistent with its fiduciary
duties under applicable law, the Bay Board may withdraw or modify its
approval or recommendation of the "agreement of merger" contained in this
Agreement, the Merger and this Agreement (or not recommend it before the Bay
Proxy Statement is sent to stockholders) or approve or recommend a Superior
Proposal, but in each case only at a time that is after the second Business
Day following Nortel's receipt of written notice advising Nortel that the Bay
Board has received a proposal which may be a Superior Proposal, specifying
the material terms and conditions of such proposal and identifying the Person
making such proposal.  Nothing in this Section 6.06 shall prohibit Bay from
complying, to the extent applicable, with Rules 14d-9 and 14e-2(a)
promulgated under the Exchange Act with respect to an Acquisition Proposal.

                 6.07.  Affiliate Agreements.  (a)  Not later than the 5th
day prior to the Effective Date, Bay shall deliver to Nortel, a schedule of
each person that, to the best of its knowledge, is or is reasonably likely to
be, as of the date of the Bay Meeting, deemed to be an "affiliate" of it
(each, a "Bay Affiliate") as that term is used in Rule 145 under the
Securities Act.

                 (b)  Bay shall use its respective reasonable best efforts to
cause each person who may be deemed to be a Bay Affiliate to execute and
deliver to Nortel on or before the date of mailing of the Bay Proxy Statement
an agreement in the form attached hereto as Exhibit A.

                 6.08.  Takeover Laws.  Subject to Section 6.06, no party
shall take any action that would cause the transactions contemplated by this
Agreement and the Option Agreement to be subject to requirements imposed by
any Takeover Law and each of them shall take all necessary steps within its
control to exempt (or ensure the continued exemption of), or minimize the
effect on, the transactions contemplated by this Agreement and the Option
Agreement from, or if necessary challenge the validity or applicability of,
any applicable Takeover Law, as now or hereafter in effect, including,
without limitation, Section 203 of the DGCL or any other Takeover Laws that
purport to apply to this Agreement or the Option Agreement or the
transactions contemplated hereby or thereby.

                 6.09.  Bay Rights Agreement.  The Bay Board shall take all
further action (in addition to that referred to in Section 3.1(m)) necessary
(including redeeming the Rights immediately prior to the Effective Time or
amending the Bay Rights Agreement) in order to render the Rights in
<PAGE>
applicable to the Merger and the other transactions contemplated by this
Agreement.

                 6.10.  Shares Listed.  Nortel shall use its best efforts to
list, prior to the Effective Date, on the NYSE and the Canadian Stock
Exchanges, subject to official notice of issuance, the shares of Nortel
Common Stock to be issued to the holders of Bay Common Stock in the Merger
and upon exercise of Bay Stock Options to be assumed by Nortel by reason of
the Merger.

                 6.11.  Regulatory Applications.  (a) Nortel and Bay and
their respective Subsidiaries shall cooperate and use their respective best
efforts (i) to prepare all documentation, to effect all filings (including,
without limitation, filings under the HSR Act and the Competition Act
(Canada)) and to obtain all permits, consents, approvals and authorizations
of all third parties and Governmental Authorities necessary to consummate the
transactions contemplated by this Agreement and (ii) to cause the Merger to
be consummated as expeditiously as reasonably practicable.  Each of Nortel
and Bay shall have the right to review in advance, and to the extent
practicable each will consult with the other, in each case subject to
applicable laws relating to the exchange of information, with respect to, all
material written information submitted to any third party or any Governmental
Authority in connection with the transactions contemplated by this Agreement. 
In exercising the foregoing right, each of the parties hereto agrees to act
reasonably and as promptly as practicable.  Each party hereto agrees that it
will consult with the other party hereto with respect to the obtaining of all
material permits, consents, approvals and authorizations of all third parties
and Governmental Authorities necessary or advisable to consummate the
transactions contemplated by this Agreement and each party will keep the
other party apprised of the status of material matters relating to completion
of the transactions contemplated hereby.

                 (b)  Each party agrees, upon request, to furnish the other
party with all information concerning itself, its Subsidiaries, directors,
officers and stockholders and such other matters as may be reasonably
necessary or advisable in connection with any filing, notice or application
made by or on behalf of such other party or any of its Subsidiaries to any
third party or Governmental Authority.

                 (c)  Each party will promptly inform the other party of any
material communication received by such party from, or given by such party to
the U.S. Federal Trade Commission (the "FTC"), the Antitrust Division of the
U.S. Department of Justice (the "DOJ") or any other Governmental Authority,
in each case regarding any of the transactions contemplated hereby and permit
the other party to review any material communication given by it to, and
consult with each other in advance of any meeting or conference with, the
FTC, the DOJ or any such other Governmental Authority, and to the extent
permitted by the FTC, the DOJ or such other applicable Governmental Entity,
give the other party the opportunity to attend and participate in such
meetings and conferences.  For purposes of this Agreement, "Regulatory Law"
means the Sherman Act, as amended, the Clayton Act, as amended, the HSR Act,
the Federal Trade Commission Act, as amended, and all other federal, state
and foreign, if any, statutes, rules, regulations, orders, decrees,
administrative and judicial doctrines and other laws that are designed or
intended to prohibit, restrict or regulate actions having the purpose or
effect of monopolization or restraint of trade or lessening of competition,
<PAGE>
whether in the computer networking industry or otherwise through merger or
acquisition.

                 (d)  In furtherance and not in limitation of the covenants
of the parties contain in Sections 6.11(a), (b) and (c), if any objections
are asserted with respect to the transactions contemplated hereby under any
Regulatory Law or if any suit is instituted or threatened by any Governmental
Authority or any private party challenging any of the transactions
contemplated hereby as violative of any Regulatory Law, each of Nortel and
Bay shall use its reasonable efforts to resolve any such objections or
challenge as such Governmental Authority or private party may have to such
transactions under such Regulatory Law so as to permit consummation of the
transactions contemplated by this Agreement, and if any administrative or
judicial action or proceeding, including any proceeding by a private party,
is instituted (or threatened to be instituted) challenging any transaction
contemplated by this Agreement as violative of any Regulatory Law, each of
Nortel and Bay shall cooperate in all respects with each other and use its
respective best efforts to contest and resist any such action or proceeding
and to have vacated, lifted, reversed or overturned any decree, judgment,
injunction or other order, whether temporary, preliminary or permanent, that
is in effect and prohibits, prevents or restricts consummation of the
transactions contemplated by this Agreement.  Notwithstanding the foregoing
or any other provision of this Agreement, nothing in this Section 6.11 shall
limit a party's right to terminate this Agreement pursuant to Section 7.01(b)
or 8.01(d) so long as such party has up to then complied in all respects with
its obligations under this Section 6.11.

                 (e)  Nothing contained in this Agreement shall require
Nortel or any of its Subsidiaries to sell or otherwise dispose of, or permit
the sale or other disposition of, any assets of Nortel, Bay or their
respective Subsidiaries, whether as a condition to obtaining any approval
from a Governmental Authority or any other Person or for any other reason.

                 6.12.  Indemnification.  (a)  Following the Effective Date
and until the sixth anniversary thereof, the Surviving Corporation shall
indemnify, defend and hold harmless the present and former directors and
officers of Bay and its Subsidiaries (each, an "Indemnified Party") against
all costs or expenses (including reasonable attorneys' fees), judgments,
fines, losses, claims, damages or liabilities (collectively, "Costs")
incurred in connection with any claim, action, suit, proceeding or
investigation, whether civil, criminal, administrative or investigative,
arising out of actions or omissions occurring at or prior to the Effective
Time (including, without limitation, the transactions contemplated by this
Agreement and the Option Agreement) to the fullest extent that Bay is
permitted to indemnify its directors and officers under the laws of the State
of Delaware, the Bay Certificate and Bay's by-laws as in effect on the date
hereof (and Nortel shall also advance expenses (or cause the Surviving
Corporation to advance expenses) as incurred to the fullest extent permitted
under applicable law).

                 (b)  For a period of six years from the Effective Time,
Nortel shall provide that portion of director's and officer's liability
insurance that serves to cover the present and former officers and directors
of Bay and its Subsidiaries (determined as of the Effective Time) with
respect to claims against such directors and officers arising from facts or
events which occurred at or before the Effective Time, which insurance shall
contain at least the same maximum coverage and amounts to such officers and
<PAGE>
directors, and contain terms and conditions no less advantageous, as that
coverage currently provided by Bay; provided, however, that in no event shall
Nortel be required to expend more than 300 percent of the current annual
amount expended by Bay (the "Insurance Amount") to maintain or procure such
directors and officers insurance coverage; provided, further, that if Nortel
is unable to maintain or obtain the insurance called for by this Section
6.12(b), Nortel shall use its reasonable best efforts to obtain as much
comparable insurance as is available for the Insurance Amount; provided,
further, that officers and directors of Bay or any Subsidiary of Bay may be
required to make application and provide customary representations and
warranties to Nortel's insurance carrier for the purpose of obtaining such
insurance.

                 (c)  Any Indemnified Party wishing to claim indemnification
under Section 6.12(a), upon learning of any claim, action, suit, proceeding
or investigation described above, shall promptly notify Nortel thereof;
provided, that the failure so to notify shall not affect the obligations of
Nortel under Section 6.12(a) unless and to the extent such failure materially
increases Nortel's liability under such subsection (a).

                 (d)  If Nortel or any of its successors or assigns shall
consolidate with or merge into any other entity and shall not be the
continuing or surviving entity of such consolidation or merger or shall
transfer all or substantially all of its assets to any entity, then and in
each case, proper provision shall be made so that the successors and assigns
of Nortel shall assume the obligations set forth in this Section 6.12.

                 6.13.  Severance and Benefit Plans.

                 (a)  Continuation and Comparability of Benefits.  Each Plan
(as defined in Section 5.03(1)(i)) with respect to which any current or
former employee of Bay or any of its Subsidiaries (each, a "Bay Employee")
participate immediately prior to the Effective Time shall become the
obligations of Nortel and the Surviving Corporation at the Effective Time
and, for at least one year thereafter, Nortel shall, or shall cause the
Surviving Corporation to: (i) maintain base salaries and (ii) either maintain
the Plans (including incentive compensation arrangements) or provide benefits
that are comparable, in the aggregate, to the benefits provided to the Bay
Employees, considered as a group, under such Plans as in effect immediately
prior to the Effective Time.  Without limiting the generality of the
foregoing, from the Effective Time and for at least one year thereafter,
Nortel shall, or shall cause the Surviving Corporation to: (A) continue the
Bay Executive Retention and Severance Plan (effective January 26, 1998)
("Severance Plan") as in effect for Bay Employees immediately prior to the
Effective Time and (B)  assume and honor any obligations of Bay under the
Severance Plan and any individual severance or employment agreements by and
between Bay or any of its Subsidiaries and any Bay Employees, as such
Severance Plan and agreements exist and are in effect as of the Effective
Time.

                 (b)  Pre-Existing Limitations; Deductibles; Service Credit. 
With respect to any employee benefit plans (within the meaning of Section
5.03(1)(i)) of Nortel ("Nortel Plans"), Nortel shall, or shall cause the
Surviving Corporation to: (A) with respect to any medical or health plan,
waive any pre-existing condition or exclusion in any Nortel Plans in which
any Bay Employee may be entitled to participate that would result in a lack
of coverage for any condition for which a Bay Employee would have been
<PAGE>
entitled to coverage under the corresponding Plan; (B) with respect to any
medical or health plan, waive any waiting period in any Nortel Plans in which
any Bay Employee may be entitled to participate that exceeds the
corresponding waiting period under the corresponding Plan (after taking into
account the service credit provided for herein for purposes of satisfying
such waiting period); (C) provide each Bay Employee with credit for any co-
payments and deductibles paid prior to the Effective Time (to the same extent
such credit was given under the analogous Plan prior to the Effective Time)
in satisfying any applicable deductible or out-of-pocket requirements under
any Nortel Plans in which such employees may be eligible to participate after
the Effective Time, and (D) recognize all service of the Bay Employees with
Bay or any of its Subsidiaries for purposes of eligibility to participate,
vesting credit, entitlement to benefits, and, solely with respect to vacation
and severance benefits, benefit accrual in any Nortel Plan in which the Bay
Employees may be eligible to participate after the Effective Time; provided
that the foregoing shall not apply to the extent it would result in
duplication of benefits.  Nothing in this paragraph shall be interpreted to
require Nortel to provide for the participation of any Bay Employee in any
Nortel Plan.

                 6.14.  Accountants' Letters.  Each of Bay and Nortel shall
use its reasonable best efforts to cause to be delivered to the other party a
letter of Ernst & Young LLP and Deloitte & Touche, respectively, independent
auditors, dated a date within two Business Days of the date on which the
Registration Statement shall become effective and addressed to such other
party, and in form and substance customary for "comfort" letters delivered by
independent accountants (x) in the case of Ernst & Young LLP, in accordance
with Statement of Accounting Standards No. 72 and (y) in the case of Deloitte
& Touche, in accordance with the Handbook of The Canadian Institute of
Chartered Accountants.

                 6.15.  Notification of Certain Matters.  (a)  Each of Bay
and Nortel shall give prompt notice to the other of any fact, event or
circumstance known to it that would cause or constitute a breach (subject to
the standard set forth in Section 5.02) of any of its representations,
warranties, material covenants or material agreements contained herein.

                 (b)  Nortel shall promptly notify Bay, and Bay shall
promptly notify Nortel, in writing, of any notice or other communication from
any regulatory authority or self-regulatory organization in connection with
the transactions contemplated by this Agreement or the Option Agreement.

                 (c)  Each of Nortel and Bay shall promptly notify the other
of any fact, event or circumstance known to it that could reasonably be
expected to, individually or taken together with all other facts, events and
circumstances known to it, cause the Merger to fail to qualify as a
"reorganization" within the meaning of Section 368(a) of the Code.

                 6.16.  Supplemental Indenture.  The Surviving Corporation
shall enter into the Second Supplemental Indenture to the Indenture (the
"Indenture") dated as of April 28, 1993, between SynOptics Communications,
Inc. and The First National Bank of Boston, as supplemented by the First
Supplemental Indenture dated as of October 20, 1994, between SynOptics
Communications, Inc. and Wellfleet Communications, Inc. and The First
National Bank of Boston.  Nortel shall take appropriate steps to ensure that
shares of Nortel Common Stock shall be issued, subject to the terms of such
<PAGE>
Indenture, upon the conversion after the Effective Time, of Debentures issued
under the Indenture.

                 6.17.  Board Representation.  At the Effective Time, David
House will be appointed to the Nortel Board and will be appointed President
of Nortel.


                                  ARTICLE VII

                   CONDITIONS TO CONSUMMATION OF THE MERGER

                 7.01.  Conditions to Each Party's Obligation to Effect the
Merger.  The respective obligation of each of Nortel, Sub and Bay to
consummate the Merger is subject to the fulfillment or written waiver by
Nortel, Sub and Bay prior to the Effective Time of each of the following
conditions:

                 (a)  Stockholder Approvals.  This "agreement of merger" (as
that term is used in DGCL Section 251) and the Merger shall have been duly
adopted by the requisite vote of the stockholders of Bay.

                 (b)  Regulatory Approvals.  All regulatory approvals
required to consummate the transactions contemplated hereby shall have been
obtained and shall remain in full force and effect and all statutory waiting
periods in respect thereof shall have expired and no such approvals shall
contain any conditions, restrictions or requirements which would reasonably
be expected to (i) following the Effective Time, have a Material Adverse
Effect on Nortel and its Subsidiaries taken as a whole or (ii) require Nortel
to take any action that it is not required to take under Section 6.11(e)
hereof. 

                 (c)  No Injunction.  No Governmental Authority of competent
jurisdiction shall (i) have enacted, issued, promulgated, enforced or entered
any statute, rule, regulation, judgment, decree, injunction or other order
(whether temporary , preliminary or permanent) which is in effect and enjoins
or prohibits consummation of the Merger or (ii) have brought an action or
proceeding seeking to enjoin or prohibit consummation of the Merger, which
action or proceeding is reasonably likely to succeed.

                 (d)  Registration Statement.  The Registration Statement
shall have become effective under the Securities Act and no stop order
suspending the effectiveness of the Registration Statement shall have been
issued and be in effect and no proceedings for that purpose shall have been
initiated or threatened by the SEC and not concluded or withdrawn.

                 (e)  Listing.  The shares of Nortel Common Stock to be
issued in the Merger and, if required, upon exercise of Bay Stock Options to
be assumed by Nortel by reason of the Merger shall have been approved for
listing on the NYSE and the Canadian Stock Exchanges, subject to official
notice of issuance.

                 7.02.  Conditions to Obligation of Bay.  The obligation of
Bay to consummate the Merger is also subject to the fulfillment or written
waiver by Bay prior to the Effective Time of each of the following
conditions.
<PAGE>
                 (a)  Representations and Warranties.  Subject to Sections
5.01 and 5.02, the representations and warranties of Nortel and Sub set forth
in this Agreement shall be true and correct as of the date of the Agreement
and as of the Effective Date as though made on and as of the Effective Date
(except that representations and warranties that by their terms speak as of
the date of this Agreement or some other date shall be true and correct as of
such date), and Bay shall have received a certificate, dated the Effective
Date, signed on behalf of Nortel by the Chief Executive Officer and the Chief
Financial Officer of Nortel to such effect.

                 (b)  Performance of Obligations.  Nortel shall have
performed in all material respects all obligations required to be performed
by it under this Agreement at or prior to the Effective Time, and Bay shall
have received a certificate, dated the Effective Date, signed on behalf of
Nortel by the Chief Executive Officer and the Chief Financial Officer of
Nortel to such effect.

                 (c)  Opinion of Bay's Counsel.  Bay shall have received an
opinion of Simpson Thacher & Bartlett, counsel to Bay, dated the Effective
Date, to the effect that, on the basis of facts, representations and
assumptions set forth in such opinion, (a) the Merger constitutes a
reorganization within the meaning of Section 368 (a) of the Code and
(b) that, accordingly, (i) no gain or loss will be recognized by Bay as a
result of the Merger and (ii) no gain or loss will be recognized by a
stockholder of Bay who receives shares of Nortel Common Stock in exchange for
shares of Bay Common Stock, except with respect to cash received in lieu of
fractional share interests.  In rendering its opinion, such counsel may
require and rely upon representations contained in letters from Bay, Nortel
and stockholders of Bay.

                 7.03.  Conditions to Obligation of Nortel and Sub.  The
obligations of Nortel and Sub to consummate the Merger are also subject to
the fulfillment or written waiver by Nortel and Sub prior to the Effective
Time of each of the following conditions:

                 (a)  Representations and Warranties.  Subject to Sections
5.01 and 5.02 the representations and warranties of Bay set forth in this
Agreement shall be true and correct as of the date of this Agreement and as
of the Effective Date as though made on and as of the Effective Date (except
that representations and warranties that by their terms speak as of the date
of this Agreement or some other date shall be true and correct as of such
date) and Nortel and Sub shall have received a certificate, dated the
Effective Date, signed on behalf of Bay by the Chief Executive Officer and
the Chief Financial Officer of Bay to such effect.

                 (b)  Performance of Obligations of Bay.  Bay shall have
performed in all material respects all obligations required to be performed
by it under this Agreement at or prior to the Effective Time, and Nortel and
Sub shall have received a certificate, dated the Effective Date, signed on
behalf of Bay by the Chief Executive Officer and the Chief Financial Officer
of Bay to such effect.

                 (c)  Opinion of Nortel and Sub's Counsel.  Nortel shall have
received an opinion of Cleary, Gottlieb, Steen & Hamilton, special counsel to
Nortel and Sub dated the Effective Date, to the effect that, on the basis of
facts, representations and assumptions set forth in such opinion, the Merger
constitutes a reorganization under Section 368(a) of the Code and no gain or
<PAGE>
income will be recognized by Nortel or Sub in the Merger.  In rendering its
opinion, Bay may require and rely upon representations contained in letters
from Bay, Nortel and stockholders of Bay.


                                 ARTICLE VIII

                                  TERMINATION

                 8.01.  Termination.  This Agreement may be terminated, and
the Merger may be abandoned:

                 (a)  Mutual Consent.  At any time prior to the Effective
Time, by the mutual consent of Nortel and Bay by action taken by the Board of
Directors of the terminating party.

                 (b)  Breach.  At any time prior to the Effective Time, by
Nortel or Bay, in the event of either: (i) a breach by the other party of any
representation or warranty contained herein (subject to the standard set
forth in Section 5.02), which breach has not been cured within 30 calendar
days after the giving of written notice to the breaching party of such
breach; or (ii) a breach by the other party of any of the covenants or
agreements contained herein, which breach (other than a breach of Section
6.06, which shall not be subject to the following clause (y)) (x) has not
been cured within 30 calendar days after the giving of written notice to the
breaching party of such breach and (y) would be reasonably likely,
individually or in the aggregate with other breaches, to result in a Material
Adverse Effect with respect to such breaching party.

                 (c)  Delay.  At any time prior to the Effective Time, by
Nortel or Bay, if its Board of Directors so determines, in the event that the
Merger is not consummated by December 31, 1998, or, in the event that an
approval of Governmental Authority required to be obtained for the
consummation of the transactions contemplated by this Agreement has not been
obtained, March 31, 1999, except to the extent that the failure of the Merger
then to be consummated arises out of or results from the knowing action or
inaction of the party seeking to terminate pursuant to this Section 8.01(c).
which action or inaction is in violation of its obligations under this
Agreement.

                 (d)  No Approval.  (i) By Bay or Nortel, by action taken by
its Board of Directors, in the event the approval of any Governmental
Authority required for consummation of the Merger and the other transactions
contemplated by this Agreement shall have been denied by final nonappealable
action of such Governmental Authority or any required approval of a
Governmental Authority contains any conditions, restrictions or requirements
which would reasonably be expected to (A) following the Effective Time, have
a Material Adverse Effect on Nortel and its Subsidiaries taken as a whole or
(B) require Nortel to take any action that it is not required to take under
Section 6.11(e) hereof.

                 (ii)  By Nortel or Bay, if its Board of Directors so
determines, in the event the approval of Bay's stockholders required by
Section 7.01(a) herein is not obtained at the Bay Meeting by reason of the
failure to obtain the requisite vote required by Section 7.01(a) at a duly
held meeting or an adjournment thereof.
<PAGE>
                 (e)  By Nortel if the Board of Directors of Bay, prior to
the Bay Meeting (i) shall withdraw or modify in any adverse manner its
approval or recommendation of this Agreement pursuant to Section 6.06, (ii)
shall approve or recommend any Acquisition Proposal or Superior Proposal or
(iii) shall resolve to take any of the actions specified in clauses (i) or
(ii) above;

                 (f)  By Bay at any time prior to the Bay Meeting, upon three
Business Days' prior notice to Nortel, if the Board of Directors of Bay shall
approve a Superior Proposal; provided, however, that (i) Bay shall have
complied with Section 6.06, (ii) the Board of Directors of Bay shall have
concluded in good faith, after giving effect to all concessions which may be
offered by Nortel pursuant to clause (iii) below, after consultation with its
financial advisors and outside counsel, that such proposal is a Superior
Proposal and (iii) prior to any such termination, Bay shall, and shall cause
its financial and legal advisors to, negotiate with Nortel to make such
adjustments in the terms and conditions of this Agreement as would enable
Nortel to proceed with the transactions contemplated hereby; provided,
however, that it shall be a condition to termination by Bay pursuant to this
Section 8.01(f) that Bay shall have made the payment of the Termination Fee
to Nortel required by Section 8.02(b) (unless Nortel shall have elected to
defer such payment pursuant to Section 8.02(c));

                 8.02.  Effect of Termination and Abandonment.  (a)  In the
event of termination of this Agreement and the abandonment of the Merger
pursuant to this Article VIII, no party to this Agreement shall have any
liability or further obligation to any other party hereunder except (i) as
set forth in Section 9.01 and (ii) that termination will not relieve a
breaching party from liability for any willful breach of this Agreement
giving rise to such termination.

                 (b)  Nortel and Bay agree that Bay shall pay to Nortel the
sum of $275 million (the "Termination Fee") solely as follows:

                 (i)  if Bay shall terminate this Agreement pursuant to
         Section 8.01(f) ,

                 (ii)  if (x) Bay or Nortel shall terminate this Agreement
         pursuant to Section 8.01(d)(ii) due to the failure of Bay's
         stockholders to approve and adopt this Agreement, (y) at any time
         after the date of this Agreement and at or before the time of the
         event giving rise to such termination there shall exist an
         Acquisition Proposal and (z) within 12 months of the termination of
         this Agreement, Bay enters into a definitive agreement with any third
         party with respect to an Acquisition Proposal or an Acquisition
         Proposal is consummated,

                 (iii)  if Nortel shall terminate this Agreement pursuant to
         Section 8.01(e), or

                 (iv)  if (w) Nortel shall terminate this Agreement pursuant
         to Section 8.01(c) or Nortel or Bay shall terminate this Agreement
         pursuant to Section 8.01(d)(i), (x) at any time after the date of
         this Agreement and at or before the time of the event giving rise to
         such termination there shall exist an Acquisition Proposal, (y)
         following the existence of such Acquisition Proposal and prior to any
         such termination, Bay shall have intentionally breached (and not
<PAGE>
         cured after notice thereof) any of its material covenants or
         agreements set forth in this Agreement in any material respect, and
         (z) within 12 months of any such termination of this Agreement, Bay
         shall enter into a definitive agreement with any third party with
         respect to an Acquisition Proposal or an Acquisition Proposal is
         consummated.

                 (c)  The Termination Fee required to be paid pursuant to
Section 8.02(b) shall be payable prior to, and shall be a pre-condition to
the effectiveness of any termination of this Agreement pursuant to Section
8.01(f).  Any other payment required to be made pursuant to Section 8.02(b)
shall be payable to Nortel not later than two Business Days after the
entering into of a definitive agreement with respect to, or the consummation
of, an Acquisition Proposal, as applicable, or a termination pursuant to
Section 8.01(e).  Notwithstanding the foregoing, (i) Nortel may elect, by
notice to Bay, to defer the payment of the Termination Fee from time to time
for a period of up to six months after the date such fee would otherwise be
payable and (ii) the Termination Fee shall cease to be payable immediately
following any exercise by Nortel of the Option under the Option Agreement. 
All payments under this Section 8.02 shall be made by wire transfer of
immediately available funds to an account designated by the party entitled to
receive payment.


                                  ARTICLE IX

                                 MISCELLANEOUS

                 9.01.  Survival.  All representations, warranties,
agreements and covenants contained in this Agreement shall not survive the
Effective Time or termination of this Agreement if this Agreement is
terminated prior to the Effective Time; provided, however, if the Effective
Time occurs, the agreements of the parties in Sections 6.12 and 6.13 and
Article IX shall survive the Effective Time, and if this Agreement is
terminated prior to the Effective Time, the agreements of the parties in
Sections 6.05(b) and 8.02 and Article IX and in the Confidentiality Agreement
shall survive such termination and the Option Agreement shall survive to the
extent provided therein.

                 9.02.  Amendment; Extension; Waiver.  (a)  Subject to
compliance with applicable law, this Agreement may be amended by the parties
hereto, by action taken or authorized by their respective Boards of
Directors, at any time before or after approval of the matters presented in
connection with the Merger by the stockholders of Bay; provided, however,
that after any approval of the transactions contemplated by this Agreement by
the stockholders of Bay, there may not be, without further approval of such
stockholders, any amendment of this Agreement which by law or in accordance
with the rules of any relevant stock exchange requires further approval by
such stockholders without such further approval.  This Agreement may not be
amended except by an instrument in writing signed on behalf of each of the
parties hereto.  

                 (b)  Prior to the Effective Time, the parties hereto, by
action taken or authorized by their respective Board of Directors, may, to
the extent legally allowed, (i) extend the time for the performance of any of
the obligations or other acts of the other parties hereto, (ii) waive any
inaccuracies in the representations and warranties contained herein or in any
<PAGE>
document delivered pursuant hereto and (iii) waive compliance with any of the
agreements or conditions contained herein.  Any agreement on the part of a
party hereto to any such extension or waiver shall be valid only if set forth
in a written instrument signed on behalf of such party, but such extension or
waiver or failure to insist on strict compliance with an obligation,
covenant, agreement or condition shall not operate as a waiver of, or
estoppel with respect to, any subsequent or other failure.

                 9.03.  Counterparts.  This Agreement may be executed in one
or more counterparts, each of which shall be deemed to constitute an
original.

                 9.04.  Governing Law.  This Agreement shall be governed by,
and interpreted in accordance with, the laws of the State of New York (except
insofar as mandatory provisions of Delaware law are applicable), without
regard to the conflict of law principles thereof.

                 9.05.  Expenses.  Subject to Section 8.02(b), each party
hereto will bear all expenses incurred by it in connection with this
Agreement and the transactions contemplated hereby, except that printing and
mailing expenses and SEC registration and filing fees shall be shared equally
between Bay and Nortel.

                 9.06.  Notices.  All notices, requests and other
communications hereunder to a party shall be in writing and shall be deemed
given if personally delivered, telecopied (with confirmation) or three
Business Days after being mailed by registered or certified mail (return
receipt requested) or one Business Day after being delivered by overnight
courier to such party at its address set forth below or such other address as
such party may specify by notice to the parties hereto.
<PAGE>
                 If to Bay, to:
          

                 Bay Networks, Inc.
                 4401 Great America Parkway
                 Santa Clara, California 95054
                 Attention:  General Counsel
                 Fax: (408) 495-5323   

                 With a copy to:

                 Simpson Thacher & Bartlett
                 425 Lexington Avenue
                 New York, New York  10017
                 Attention:  Charles I. Cogut, Esq.
                 William E. Curbow, Esq.
                 Fax: (212) 455-2502

                 and with another copy to

                 Gray Cary Ware & Freidenrich
                 400 Hamilton Avenue
                 Palo Alto, California  94301
                 Attention:  Rod J. Howard, Esq.
                 Fax: (650) 327-3699

                 If to Nortel or to Sub, to:

                 Northern Telecom Limited
                 8200 Dixie Road, Suite 100
                 Brampton, Ontario
                 Canada L6T 5P6
                 Attention:  Corporate Secretary
                 Fax: (905) 863-8423

                 With a copy to:

                 Cleary, Gottlieb, Steen & Hamilton
                 One Liberty Plaza
                 New York, New York 10006
                 Attention: Victor I. Lewkow, Esq.
                 Fax: (212) 225-3999

                 9.07.  Entire Understanding.  This Agreement (including the
Disclosure Schedules), the Option Agreement and the Confidentiality Agreement 
represent the entire understanding of the parties hereto with reference to the 
transactions contemplated hereby and thereby and this Agreement supersedes any 
and all other oral or written agreements (other than the Confidentiality 
Agreement) heretofore made.

                 9.08.  Assignment; No Third Party Beneficiaries.  Neither
this Agreement, nor any of the rights, interests or obligations shall be
assigned by any of the parties hereto (whether by operation of law or
otherwise) without the prior written consent of the other parties.  Subject
to the preceding sentence, this Agreement will be binding upon, inure to the
benefit of and be enforceable by the parties and their respective successors
and assigns.  Except for Section 6.12, nothing in this Agreement expressed or
<PAGE>
implied, is intended to confer upon any person, other than the parties hereto
or their respective successors, any rights, remedies, obligations or
liabilities under or by reason of this Agreement.

                 9.09.  Interpretation.  When a reference is made in this
Agreement to Sections, Exhibits or Disclosure Schedules, such reference shall
be to a Section of, or Exhibit or Disclosure Schedule to, this Agreement
unless otherwise indicated.  The table of contents and headings contained in
this Agreement are for reference purposes only and are not part of this
Agreement.  Whenever the words "include", "includes" or "including" are used
in this Agreement, they shall be deemed to be followed by the words "without
limitation".  Any reference to "herein" or "hereof" or similar terms shall
refer to the agreement as a whole rather than to the individual paragraph,
section or article.

                 9.10.  Severability.  Any term or provision of this
Agreement which is invalid or unenforceable in any jurisdiction shall, as to
that jurisdiction, be ineffective to the extent of such invalidity or
unenforceability without rendering invalid or unenforceable the remaining
terms and provisions of this Agreement or affecting the validity or
enforceability of any of the terms or provisions of this Agreement in any
other jurisdiction.  If any provision of this Agreement is so broad as to be
unenforceable, the provision shall be interpreted to be only so broad as it
is enforceable.
<PAGE>
                 IN WITNESS WHEREOF, the parties hereto have caused this
Agreement to be executed in counterparts by their duly authorized officers,
all as of the day and year first above written.
                                      NORTHERN TELECOM LIMITED


                                      By:/s/ John A. Roth
                                      Name:
                                      Title:


                                      By:/s/ C.W. Scott
                                         --------------
                                      Name:
                                      Title:


                                      NORTHERN SUB INC.


                                      By:/s/ C.W. Scott
                                         --------------
                                      Name:
                                      Title:


                                      BAY NETWORKS, INC.


                                      By:/s/ David L. House
                                         ------------------
                                      Name:
                                      Title:
<PAGE>



===========================================================================






                         AGREEMENT AND PLAN OF MERGER
                                 by and among
                           NORTHERN TELECOM LIMITED,
                               NORTHERN SUB INC.
                                      and
                              BAY NETWORKS, INC.
                           Dated as of June 15, 1998






===========================================================================
                                                                              
<PAGE>
                               TABLE OF CONTENTS


                                                                          Page

                                   ARTICLE I

                              CERTAIN DEFINITIONS . . . . . . . . . . . .    1

         1.01.  Certain Definitions . . . . . . . . . . . . . . . . . . .    1

                                  ARTICLE II

                       THE MERGER; EFFECTS OF THE MERGER  . . . . . . . .    6

         2.01.  The Merger  . . . . . . . . . . . . . . . . . . . . . . .    6
         2.02.  Effective Date and Effective Time . . . . . . . . . . . .    7
         2.03.  Tax Consequences  . . . . . . . . . . . . . . . . . . . .    7

                                  ARTICLE III

                   CONVERSION OF SHARES; EXCHANGE PROCEDURES  . . . . . .    7

         3.01.  Conversion of Shares  . . . . . . . . . . . . . . . . . .    7
         3.02.  Issuance of Shares of the Surviving Corporation  . . . .    8
         3.03.  Rights as Stockholders; Stock Transfers . . . . . . . . .    8
         3.04.  Fractional Shares . . . . . . . . . . . . . . . . . . . .    8
         3.05.  Exchange Procedures . . . . . . . . . . . . . . . . . . .    9
         3.06.  Anti-Dilution Provisions  . . . . . . . . . . . . . . . .   10
         3.07.  Stock Options and Other Stock Plans . . . . . . . . . . .   10

                                  ARTICLE IV

                            ACTIONS PENDING MERGER  . . . . . . . . . . .   11

         4.01.  Forbearances of Bay . . . . . . . . . . . . . . . . . . .   11
         4.02.  Forbearances of Nortel  . . . . . . . . . . . . . . . . .   14

                                   ARTICLE V

                        REPRESENTATIONS AND WARRANTIES  . . . . . . . . .   15

         5.01.  Disclosure Schedules  . . . . . . . . . . . . . . . . . .   15
         5.02.  Standard  . . . . . . . . . . . . . . . . . . . . . . . .   15
         5.03.  Representations and Warranties of Bay . . . . . . . . . .   15
         5.04.  Representations and Warranties of Nortel and Sub  . . . .   24

                                  ARTICLE VI

                                   COVENANTS  . . . . . . . . . . . . . .   27

         6.01.  Best Efforts  . . . . . . . . . . . . . . . . . . . . . .   28
         6.02.  Stockholder Approvals . . . . . . . . . . . . . . . . . .   28
         6.03.  Registration Statement  . . . . . . . . . . . . . . . . .   28
         6.04.  Press Releases  . . . . . . . . . . . . . . . . . . . . .   29
         6.05.  Access; Information . . . . . . . . . . . . . . . . . . .   29
         6.06.  Acquisition Proposals . . . . . . . . . . . . . . . . . .   30
<PAGE>
         6.07.  Affiliate Agreements  . . . . . . . . . . . . . . . . . .   31
         6.08.  Takeover Laws . . . . . . . . . . . . . . . . . . . . . .   31
         6.09.  Bay Rights Agreement  . . . . . . . . . . . . . . . . . .   31
         6.10.  Shares Listed . . . . . . . . . . . . . . . . . . . . . .   32
         6.11.  Regulatory Applications . . . . . . . . . . . . . . . . .   32
         6.12.  Indemnification . . . . . . . . . . . . . . . . . . . . .   33
         6.13.  Severance and Benefit Plans . . . . . . . . . . . . . . .   34
         6.14.  Accountants' Letters  . . . . . . . . . . . . . . . . . .   35
         6.15.  Notification of Certain Matters . . . . . . . . . . . . .   35
         6.16.  Supplemental Indenture  . . . . . . . . . . . . . . . . .   35
         6.17.  Board Representation  . . . . . . . . . . . . . . . . . .   36

                                  ARTICLE VII

                   CONDITIONS TO CONSUMMATION OF THE MERGER   . . . . . .   36

         7.01.  Conditions to Each Party's Obligation to Effect the
                 Merger . . . . . . . . . . . . . . . . . . . . . . . . .   36
         7.02.  Conditions to Obligation of Bay . . . . . . . . . . . . .   36
         7.03.  Conditions to Obligation of Nortel and Sub  . . . . . . .   37

                                 ARTICLE VIII

                                  TERMINATION . . . . . . . . . . . . . .   38

         8.01.  Termination . . . . . . . . . . . . . . . . . . . . . . .   38
         8.02.  Effect of Termination and Abandonment . . . . . . . . . .   39

                                  ARTICLE IX

                                 MISCELLANEOUS  . . . . . . . . . . . . .   40

         9.01.  Survival  . . . . . . . . . . . . . . . . . . . . . . . .   40
         9.02.  Amendment; Extension; Waiver  . . . . . . . . . . . . . .   40
         9.03.  Counterparts  . . . . . . . . . . . . . . . . . . . . . .   41
         9.04.  Governing Law . . . . . . . . . . . . . . . . . . . . . .   41
         9.05.  Expenses  . . . . . . . . . . . . . . . . . . . . . . . .   41
         9.06.  Notices . . . . . . . . . . . . . . . . . . . . . . . . .   41
         9.07.  Entire Understanding  . . . . . . . . . . . . . . . . . .   42
         9.08.  Assignment; No Third Party Beneficiaries  . . . . . . . .   42
         9.09.  Interpretation  . . . . . . . . . . . . . . . . . . . . .   43
         9.10.  Severability  . . . . . . . . . . . . . . . . . . . . . .   43



                                                               EXHIBIT 99.1

                            STOCK OPTION AGREEMENT

          STOCK OPTION AGREEMENT, dated as of June 15, 1998, between NORTHERN
TELECOM LIMITED, a Canadian corporation ("Grantee"), and BAY NETWORKS, INC.,
a Delaware corporation ("Issuer").

                             W I T N E S S E T H:

          WHEREAS, concurrently herewith, Grantee and Issuer are entering
into an Agreement and Plan of Merger (the "Merger Agreement");

          WHEREAS, as a condition and inducement to Grantee's execution of
the Merger Agreement and pursuant of the transactions contemplated thereby
and in consideration therefor, Issuer has agreed to grant Grantee the Option
(as hereinafter defined); and

          WHEREAS, the Board of Directors of Issuer has approved the grant of
the Option and the Merger Agreement prior to the execution hereof;

          NOW, THEREFORE, in consideration of the foregoing and the mutual
covenants and agreements set forth herein and in the Merger Agreement, the
parties hereto agree as follows:

          1.  The Option.  (a)  Issuer hereby grants to Grantee an
unconditional, irrevocable option (the "Option") to purchase, subject to the
terms hereof, up to an aggregate of 33,232,634 fully paid and nonassessable
shares of the common stock, $0.01 par value per share, of Issuer ("Common
Stock") at a price per share equal to $33.29 (such price, as adjusted if
applicable, the "Option Price"); provided, however, that in no event shall
the number of shares for which this Option is exercisable exceed 14.9% of the
issued and outstanding shares of Common Stock at the time of exercise without
giving effect to the shares of Common Stock issued or issuable under the
Option.  The number of shares of Common Stock that may be received upon the
exercise of the Option and the Option Price are subject to adjustment as
herein set forth.

          (b)  In the event that any additional shares of Common Stock are
issued or otherwise become outstanding after the date of this Agreement
(other than pursuant to this Agreement and other than pursuant to an event
described in Section 5(a) hereof), the number of shares of Common Stock
subject to the Option shall be increased so that, after such issuance, such
number together with any shares of Common Stock previously issued pursuant
hereto, equals 14.9% of the number of shares of Common Stock then issued and
outstanding without giving effect to any shares subject or issued pursuant to
the Option.  Nothing contained in this Section 1(b) or elsewhere in this
Agreement shall be deemed to authorize Issuer or Grantee to breach any
provision of the Merger Agreement.

          2.  Exercise; Closing.  (a)  Grantee and/or any other person that
shall become a holder of all or part of the Option in accordance with the
terms of this Agreement (each such person being referred to herein as the
"Holder") may exercise the Option, in whole or part, if, but only if, the
Termination Fee provided for in Section 8.02(b) of the Merger Agreement has
become payable (a "Triggering Event") and such exercise is prior to the
occurrence of an Exercise Termination Event (as hereinafter defined). 
<PAGE>
Notwithstanding anything to the contrary contained herein, this Agreement
shall automatically terminate upon the termination of the Merger Agreement by
Issuer pursuant to Section 8.01(b) thereof.

          (b)  Each of the following shall be an "Exercise Termination
Event":

          (i)  the Effective Time (as defined in the Merger Agreement); or

         (ii)  termination of the Merger Agreement in accordance with the
     provisions thereof if such termination occurs prior to the occurrence of
     a Triggering Event and at the time of such termination the conditions
     prerequisite to a Triggering Event occurring in the future are incapable
     of being fulfilled; or 

        (iii)  the passage of thirteen (13) months (or such longer period as
     provided in Section 10) after termination of the Merger Agreement; or

         (iv)  the receipt by Grantee of the Termination Fee.

          (c)  Issuer shall notify Grantee promptly in writing of the
occurrence of any Triggering Event (other than a Triggering Event by reason
of a termination of the Merger Agreement pursuant to Section 8.01(e)), it
being understood that the giving of such notice by Issuer shall not be a
condition to the right of the Holder to exercise the Option.

          (d)  In the event the Holder is entitled to and wishes to exercise
the Option (or any portion thereof), it shall send to Issuer a written notice
(the date of which being herein referred to as the "Notice Date") specifying
(i) the total number of shares it will purchase pursuant to such exercise and
(ii) a place and date not earlier than three business days nor later than
60 business days from the Notice Date for the closing of such purchase (the
"Closing Date"); provided, that if the closing of such purchase cannot be
consummated by reason of any applicable judgment, injunction, decree, order,
law or regulation, the period of time that would otherwise run pursuant to
this sentence shall run instead from the date on which such restriction on
consummation has expired or been terminated; and provided, further, that if
prior notification to or approval of any regulatory or antitrust agency is
required in connection with such purchase, the Holder shall promptly file the
required notice or application for approval, shall promptly notify Issuer of
such filing, and shall expeditiously process the same and the period of time
that otherwise would run pursuant to this sentence shall run instead from the
date on which any required notification periods have expired or been
terminated or such approvals have been obtained and any requisite waiting
period or periods shall have passed.  Any exercise of the Option shall be
deemed to occur on the Notice Date relating thereto.

          (e)  At the closing referred to in subsection (d) of this
Section 2, the Holder shall (i) pay to Issuer the aggregate purchase price
for the shares of Common Stock purchased pursuant to the exercise of the
Option in immediately available funds by wire transfer to a bank account
designated by Issuer, provided that failure or refusal of Issuer to designate
such a bank account shall not preclude the Holder from exercising the Option
by delivery of a certified check or bank draft and (ii) present and surrender
this Agreement to Issuer.
<PAGE>
          (f)  At such closing, simultaneously with the delivery of
immediately available funds as provided in subsection (e) of this Section 2,
Issuer shall deliver to the Holder a certificate or certificates representing
the number of shares of Common Stock purchased by the Holder and, if the
Option should be exercised in part only, a new Option evidencing the rights
of the Holder thereof to purchase the balance of the shares purchasable
hereunder.

          (g)  Certificates for Common Stock delivered at a closing hereunder
may be endorsed with a restrictive legend that shall read substantially as
follows:

          "The transfer of the shares represented by this
          certificate is subject to certain provisions of an
          agreement between the registered holder hereof and Issuer
          and to resale restrictions arising under applicable
          securities laws (including the Securities Act of 1933, as
          amended).  A copy of such agreement is on file at the
          principal office of Issuer and will be provided to the
          holder hereof without charge upon receipt by Issuer of a
          written request therefor."

It is understood and agreed that:  (i) the reference to the resale
restrictions arising under applicable securities laws, including the
Securities Act of 1933, as amended (the "Securities Act"), in the above
legend shall be removed by delivery of substitute certificate(s) without such
reference if the Holder shall have delivered to Issuer a copy of a letter
from the staff of the Securities and Exchange Commission, or an opinion of
counsel, in form and substance reasonably satisfactory to Issuer, to the
effect that such legend is not required for purposes of the Securities Act or
other applicable securities laws; (ii) the reference to the provisions of
this Agreement in the above legend shall be removed by delivery of substitute
certificate(s) without such reference if the shares have been sold or
transferred in compliance with the provisions of this Agreement and under
circumstances that do not require the retention of such reference in the
opinion of counsel to the Holder, in form and substance reasonably
satisfactory to Issuer; and (iii) the legend shall be removed in its entirety
if the conditions in the preceding clauses (i) and (ii) are both satisfied. 
In addition, such certificates shall bear any other legend as may be required
by law.

The Holder understands and agrees that the Option is being issued to the
Holder pursuant to the registration and prospectus exceptions in paragraph
35(1) and clause 72(1)(b0 of the Securities Act (Ontario) (the "Ontario Act")
and that the resale of the Option or Common Stock issued upon exercise of the
Option is restricted by the provisions of the Ontario Act and other
applicable Canadian securities legislation.

          (h)  Upon the giving by the Holder to Issuer of the written notice
of exercise of the Option provided for under subsection (f) of this Section 2
and the tender of the applicable purchase price in immediately available
funds, the Holder shall be deemed to be the holder of record of the shares of
Common Stock issuable upon such exercise, notwithstanding that the stock
transfer books of Issuer shall then be closed or that certificates
representing such shares of Common Stock shall not then be actually delivered
to the Holder.  Issuer shall pay all expenses, and any and all United States
federal, state and local taxes and other charges that may be payable in
<PAGE>
connection with the preparation, issue and delivery of stock certificates
under this Section 2 in the name of the Holder or its assignee, transferee or
designee.

          3.  Covenants of Issuer.  In addition to its other agreements and
covenants herein, Issuer agrees:

          (a)  that it shall at all times maintain, free from any
     subscription or preemptive rights, sufficient authorized but unissued or
     treasury shares of Common Stock so that the Option may be exercised
     without additional authorization of Common Stock after giving effect to
     all other options, warrants, convertible securities and other rights of
     third parties to purchase Common Stock from Issuer or to cause Issuer to
     issue shares of Common Stock; 

          (b)  that it will not, by charter amendment or through
     reorganization, consolidation, merger, dissolution or sale of assets, or
     by any other voluntary act, avoid or seek to avoid the observance or
     performance of any of the covenants, stipulations or conditions to be
     observed or performed hereunder by Issuer; and

          (c)  promptly to take all action as may from time to time be
     required (including complying with all applicable notification, filing
     reporting and waiting period requirements under HSR or otherwise, and
     cooperating fully with the Holder in preparing any applications or
     notices and providing such information to any regulatory authority as it
     may require) in order to permit the Holder to exercise the Option and
     Issuer duly and effectively to issue shares of Common Stock pursuant
     hereto.

          4.  Exchange; Replacement.  This Agreement (and the Option granted
hereby) are exchangeable, without expense, at the option of the Holder, upon
presentation and surrender of this Agreement at the principal office of
Issuer, for other Agreements providing for Options of different denominations
entitling the holder thereof to purchase, on the same terms and subject to
the same conditions as are set forth herein, in the aggregate the same number
of shares of Common Stock purchasable hereunder.  The terms "Agreement" and
"Option" as used herein include any Agreements and related Options for which
this Agreement (and the Option granted hereby) may be exchanged.  Upon
receipt by Issuer of evidence reasonably satisfactory to it of the loss,
theft, destruction or mutilation of this Agreement, and (in the case of loss,
theft or destruction) of reasonably satisfactory indemnification, and upon
surrender and cancellation of this Agreement, if mutilated, Issuer will
execute and deliver a new Agreement of like tenor and date.  Any such new
Agreement executed and delivered shall constitute an additional contractual
obligation on the part of Issuer, whether or not the Agreement so lost,
stolen, destroyed or mutilated shall at any time be enforceable by any person
other than the holder of the new Agreement.

          5.  Adjustments.  In addition to the adjustment in the number of
shares of Common Stock that are purchasable upon exercise of the Option
pursuant to Section 1 of this Agreement, the number of shares of Common Stock
purchasable upon the exercise of the Option and the Option Price shall be
subject to adjustment from time to time as provided in this Section 5.

          (a)  In the event of any change in, or distributions in respect of,
the Common Stock by reason of stock dividends, split-ups, mergers,
<PAGE>
recapitalizations, combinations, subdivisions, conversions, exchanges of
shares or the like, the type and number of shares of Common Stock purchasable
upon exercise hereof shall be appropriately adjusted and proper provision
shall be made so that, in the event that any additional shares of Common
Stock are to be issued or otherwise become outstanding as a result of any
such change (other than pursuant to an exercise of the Option), the number of
shares of Common Stock that remain subject to the Option shall be increased
so that, after such issuance and together with shares of Common Stock
previously issued pursuant to the exercise of the Option (as adjusted on
account of any of the foregoing changes in the Common Stock), it equals 14.9%
of the number of shares of Common Stock then issued and outstanding.

          (b)  Whenever the number of shares of Common Stock purchasable upon
exercise hereof is adjusted as provided in this Section 5, the Option Price
shall be adjusted by multiplying the Option Price by a fraction, the
numerator of which shall be equal to the number of shares of Common Stock
purchasable prior to the adjustment and the denominator of which shall be
equal to the number of shares of Common Stock purchasable after the
adjustment.

          6.  Registration.  (a)  Upon the occurrence of any Triggering Event
that occurs prior to an Exercise Termination Event, Issuer shall, at the
request of Grantee delivered within twelve (12) months (or such later period
as provided in Section 10) of such Triggering Event (whether on its own
behalf or on behalf of any subsequent holder of this Option (or part thereof)
or any of the shares of Common Stock issued pursuant hereto), promptly
prepare, file and keep current a shelf registration statement under the
Securities Act covering any shares issued and issuable pursuant to this
Option and shall use its reasonable best efforts to cause such registration
statement to become effective and remain current in order to permit the sale
or other disposition of any shares of Common Stock issued upon total or
partial exercise of this Option ("Option Shares") in accordance with any plan
of disposition requested by Grantee.  Issuer will use its reasonable best
efforts to cause such registration statement promptly to become effective and
then to remain effective for such period not in excess of 180 days from the
day such registration statement first becomes effective or such shorter time
as may be reasonably necessary to effect such sales or other dispositions. 
Grantee shall have the right to demand two such registrations.  The Issuer
shall bear the costs of such registrations (including, but not limited to,
Issuer's attorneys' fees, printing costs and filing fees, except for
underwriting discounts or commissions, brokers' fees and the fees and
disbursements of Grantee's counsel related thereto).  The foregoing
notwithstanding, if, at the time of any request by Grantee for registration
of Option Shares as provided above, Issuer is in registration with respect to
an underwritten public offering by Issuer of shares of Common Stock, and if
in the good faith judgment of the managing underwriter or managing
underwriters, or, if none, the sole underwriter or underwriters, of such
offering the inclusion of the Option Shares would interfere with the
successful marketing of the shares of Common Stock offered by Issuer, the
number of Option Shares otherwise to be covered in the registration statement
contemplated hereby may be reduced; provided, however, that after any such
required reduction the number of Option Shares to be included in such
offering for the account of the Holder shall constitute at least 25% of the
total number of shares to be sold by the Holder and Issuer in the aggregate;
and provided further, however, that if such reduction occurs, then Issuer
shall file a registration statement for the balance as promptly as
practicable thereafter as to which no reduction pursuant to this Section 6
<PAGE>
shall be permitted or occur and the Holder shall thereafter be entitled to
one additional registration and the twelve (12) month period referred to in
the first sentence of this section shall be increased to twenty-four (24)
months.  Each such Holder shall provide all information reasonably requested
by Issuer for inclusion in any registration statement to be filed hereunder. 
If requested by any such Holder in connection with such registration, Issuer
shall become a party to any underwriting agreement relating to the sale of
such shares, but only to the extent of obligating itself in respect of
representations, warranties, indemnities and other agreements customarily
included in such underwriting agreements for Issuer.  Upon receiving any
request under this Section 6 from any Holder, Issuer agrees to send a copy
thereof to any other person known to Issuer to be entitled to registration
rights under this Section 6, in each case by promptly mailing the same,
postage prepaid, to the address of record of the persons entitled to receive
such copies.  Notwithstanding anything to the contrary contained herein, in
no event shall the number of registrations that Issuer is obligated to effect
be increased by reason of the fact that there shall be more than one Holder
as a result of any assignment or division of this Agreement.

          (b)  In the event that Grantee so requests, the closing of the sale
or other disposition of the Common Stock or other securities pursuant to a
registration statement filed pursuant to Section 6(a) shall occur
substantially simultaneously with the exercise of the Option.

          (c)  If the Common Stock or the class of any other securities to be
acquired upon exercise of the Option are then listed on the New York Stock
Exchange, Inc., Issuer, upon the request of the Holder, shall promptly file
an application to list the Common Stock or other securities to be acquired
upon exercise of the Option on the New York Stock Exchange, Inc. and will use
its reasonable best efforts to obtain approval of such listing as soon as
practicable.

          7.  Repurchase of Option and/or Option Shares.   (a)  At any time
after the occurrence of a Triggering Event (i) at the request of the Holder,
delivered in writing prior to an Exercise Termination Event (or such later
period as provided in Section 10), Issuer (or any successor thereto) shall
repurchase the Option from the Holder at a price (the "Option Repurchase
Price") equal to the amount by which (A) the market/offer price (as defined
below) exceeds (B) the Option Price, multiplied by the number of shares for
which this Option may then be exercised and (ii) at the request of the owner
of Option Shares from time to time (the "Owner"), delivered in writing prior
to an Exercise Termination Event (or such later period as provided in
Section 10), Issuer (or any successor thereto) shall repurchase such number
of the Option Shares from the Owner as the Owner shall designate at a price
(the "Option Share Repurchase Price") equal to the market/offer price
multiplied by the number of Option Shares so designated.  The term
"market/offer price" shall mean the highest of (i) the price per share of
Common Stock at which a tender or exchange offer therefor has been made,
(ii) the price per share of Common Stock to be paid by any third party
pursuant to an agreement with Issuer, (iii) the highest closing price for
shares of Common Stock within the six-month period immediately preceding the
date the Holder gives notice of the required repurchase of this Option or the
Owner gives notice of the required repurchase of Option Shares, as the case
may be, or (iv) in the event of a sale of all or substantially all of
Issuer's assets, the sum of the net price paid in such sale for such assets
and the current market value of the remaining net assets of Issuer as
determined by a nationally recognized investment banking firm selected by the
<PAGE>
Holder or the Owner, as the case may be, and reasonably acceptable to Issuer,
divided by the number of shares of Common Stock of Issuer outstanding at the
time of such sale, which determination, absent manifest error, shall be
conclusive for all purposes of this Agreement.  In determining the
market/offer price, the value of consideration other than cash shall be
determined by a nationally recognized investment banking firm selected by the
Holder or Owner, as the case may be, and reasonably acceptable to Issuer,
which determination, absent manifest error, shall be conclusive for all
purposes of this Agreement.

          (b)  The Holder and the Owner, as the case may be, may exercise its
right to require Issuer to repurchase the Option and any Option Shares
pursuant to this Section 7 by surrendering for such purpose to Issuer, at its
principal office, a copy of this Agreement or certificates for Option Shares,
as applicable, accompanied by a written notice or notices stating that the
Holder or the Owner, as the case may be, elects to require Issuer to
repurchase this Option and/or the Option Shares in accordance with the
provisions of this Section 7.  As promptly as practicable, and in any event
within five business days after the surrender of the Option and/or
certificates representing Option Shares and the receipt of such notice or
notices relating thereto, Issuer shall deliver or cause to be delivered to
the Holder the Option Repurchase Price and/or to the Owner the Option Share
Repurchase Price therefor or the portion thereof that Issuer is not then
prohibited under applicable law and regulation from so delivering.

          (c)  To the extent that Issuer is prohibited under applicable law
or regulation from repurchasing the Option and/or the Option Shares in full,
Issuer shall immediately so notify the Holder and/or the Owner and thereafter
deliver or cause to be delivered, from time to time, to the Holder and/or the
Owner, as appropriate, the portion of the Option Repurchase Price and the
Option Share Repurchase Price, respectively, that it is no longer prohibited
from delivering, within five business days after the date on which Issuer is
no longer so prohibited; provided, however, that if Issuer at any time after
delivery of a notice of repurchase pursuant to paragraph (b) of this
Section 7 is prohibited under applicable law or regulation from delivering to
the Holder and/or the Owner, as appropriate, the Option Repurchase Price and
the Option Share Repurchase Price, respectively, in full (and Issuer hereby
undertakes to use its reasonable best efforts to obtain all required
regulatory and legal approvals and to file any required notices as promptly
as practicable in order to accomplish such repurchase), the Holder or Owner
may revoke its notice of repurchase of the Option and/or the Option Shares
whether in whole or to the extent of the prohibition, whereupon, in the
latter case, Issuer shall promptly (i) deliver to the Holder and/or the
Owner, as appropriate, that portion of the Option Repurchase Price and/or the
Option Share Repurchase Price that Issuer is not prohibited from delivering;
and (ii) deliver, as appropriate, either (A) to the Holder, a new Agreement
evidencing the right of the Holder to purchase that number of shares of
Common Stock obtained by multiplying the number of shares of Common Stock for
which the surrendered Agreement was exercisable at the time of delivery of
the notice of repurchase by a fraction, the numerator of which is the Option
Repurchase Price less the portion thereof theretofore delivered to the Holder
and the denominator of which is the Option Repurchase Price, and/or (B) to
the Owner, a certificate for the Option Shares it is then so prohibited from
repurchasing.  If an Exercise Termination Event shall have occurred prior to
the date of the notice by Issuer described in the first sentence of this
subsection (c), or shall be scheduled to occur at any time before the
expiration of a period ending on the thirtieth day after such date, the
<PAGE>
Holder shall nonetheless have the right to exercise the Option until the
expiration of such 30-day period.

          8.  Substitute Option.  (a)  In the event that prior to an Exercise
Termination Event, Issuer shall enter into an agreement (i) to consolidate
with or merge into any person, other than Grantee or any of its Subsidiaries
(collectively, "Excluded Persons") and Issuer shall not be the continuing or
surviving corporation of such consolidation or merger, (ii) to permit any
person, other than an Excluded Person, to merge into Issuer and Issuer shall
be the continuing or surviving or acquiring corporation, but, in connection
with such merger, the then outstanding shares of Common Stock shall be
changed into or exchanged for stock or other securities of any other person
or cash or any other property or the then outstanding shares of Common Stock
shall after such merger represent less than 50% of the outstanding shares and
share equivalents of the merged or acquiring company, or (iii) to sell or
otherwise transfer all or substantially all of its or any Significant
Subsidiary's assets to any person, other than an Excluded Person, then, and
in each such case, the agreement governing such transaction shall make proper
provision so that the Option shall, upon the consummation of any such
transaction and upon the terms and conditions set forth herein, be converted
into, or exchanged for, an option (the "Substitute Option"), at the election
of the Holder, of either (x) the Acquiring Corporation (as hereinafter
defined) or (y) any person that controls the Acquiring Corporation.

          (b)  The following terms have the meanings indicated:

          (i)  "Acquiring Corporation" shall mean (i) the continuing or
     surviving person of a consolidation or merger with Issuer (if other than
     Issuer), (ii) Issuer in a merger in which Issuer is the continuing or
     surviving or acquiring person, and (iii) the transferee of all or
     substantially all of Issuer's assets (or the assets of a Significant
     Subsidiary of Issuer).

         (ii)  "Substitute Shares" shall mean the shares of capital stock (or
     similar equity interest) with the greatest voting power in respect of
     the election of directors (or other persons similarly responsible for
     direction of the business and affairs) of the issuer of the Substitute
     Option.

        (iii)  "Assigned Value" shall mean the market/offer price, as defined
     in Section 7.

         (iv)  "Average Price" shall mean the average closing price per
     Substitute Share, on the principal trading market on which such shares
     are traded as reported by a recognized source, for one year immediately
     preceding the consolidation, merger or sale in question, but in no event
     higher than the closing price of the Substitute Shares on such market on
     the day preceding such consolidation, merger or sale; provided that if
     Issuer is the issuer of the Substitute Option, the Average Price shall
     be computed with respect to a share of common stock issued by the person
     merging into Issuer or by any company which controls or is controlled by
     such person, as the Holder may elect.

          (c)  The Substitute Option shall have the same terms as the Option,
provided that if the terms of the Substitute Option cannot, for legal
reasons, be the same as the Option, such terms shall be as similar as
possible and in no event less advantageous to the Holder.  The issuer of the
<PAGE>
Substitute Option shall also enter into an agreement with the then Holder or
Holders of the Substitute Option in substantially the same form as this
Agreement (after giving effect for such purpose to the provisions of
Section 9), which agreement shall be applicable to the Substitute Option.

          (d)  The Substitute Option shall be exercisable for such number of
Substitute Shares as is equal to the Assigned Value multiplied by the number
of shares of Common Stock for which the Option was exercisable immediately
prior to the event described in the first sentence of Section 8(a), divided
by the Average Price.  The exercise price of the Substitute Option per
Substitute Share shall then be equal to the Option Price multiplied by a
fraction, the numerator of which shall be the number of shares of Common
Stock for which the Option was exercisable immediately prior to the event
described in the first sentence of Section 8(a) and the denominator of which
shall be the number of Substitute Shares for which the Substitute Option is
exercisable.

          (e)  In no event, pursuant to any of the foregoing paragraphs,
shall the number of shares purchasable upon exercise of the Substitute Option
exceed 14.9% of the Substitute Shares then issued and outstanding at the time
of exercise (without giving effect to Substitute Shares issued or issuable
under the Substitute Option).  In the event that the Substitute Option would
be exercisable for more than 14.9% of the Substitute Shares then issued and
outstanding prior to exercise but for this clause (e), the issuer of the
Substitute Option (the "Substitute Option Issuer") shall make a cash payment
to Holder equal to the excess of (i) the value of the Substitute Option
without giving effect to the limitation in this clause (e) over (ii) the
value of the Substitute Option after giving effect to the limitation in this
clause (e).  This difference in value shall be determined by a nationally
recognized investment banking firm selected by Grantee (or, if Grantee is not
then the Holder owning Options with respect to the largest number of Shares,
the largest Holder), which determination, absent manifest error, shall be
conclusive for all purposes of this Agreement.

          (f)  In addition to any other restrictions or covenants, Issuer
agrees that it shall not enter or agree to enter into any transaction
described in Section 8(a) unless (i) the Acquiring Corporation and any person
that controls the Acquiring Corporation assume in writing all the obligations
of Issuer hereunder and (ii) the Substitute Option Issuer agrees to comply
with this Section 8 and agrees to take all action necessary to prevent the
exercise of any rights of any holder of Substitute Shares or shares of
capital stock of any successor to the Substitute Option Issuer that any
holder of the Substitute Option (each such person being referred to herein as
a "Substitute Option Holder") or any holder of Substitute Shares (each such
person being referred to herein as a "Substitute Share Owner") purchased upon
exercise of the Substitute Option by a Substitute Option Holder would be
prohibited or precluded from exercising or the exercise of which would
adversely affect the rights of any Substitute Option Holder under the
agreement for such Substitute Option or the transactions contemplated by the
Merger Agreement.

          9.  Repurchase of Substitute Option.  (a)  At the written request
of a Substitute Option Holder, the Substitute Option Issuer shall repurchase
the Substitute Option from the Substitute Option Holder at a price (the
"Substitute Option Repurchase Price") equal to the amount by which (i) the
Highest Closing Price (as hereinafter defined) exceeds (ii) the exercise
price of the Substitute Option, multiplied by the number of Substitute Shares
<PAGE>
for which the Substitute Option may then be exercised, and at the request of
the Substitute Share Owner, the Substitute Option Issuer shall repurchase the
Substitute Shares at a price (the "Substitute Share Repurchase Price") equal
to the Highest Closing Price multiplied by the number of Substitute Shares so
designated.  The term "Highest Closing Price" shall mean the highest closing
price for Substitute Shares within the six-month period immediately preceding
the date the Substitute Option Holder gives notice of the required repurchase
of the Substitute Option or the Substitute Share Owner gives notice of the
required repurchase of the Substitute Shares, as applicable.

          (b)  The Substitute Option Holder and the Substitute Share Owner,
as the case may be, may exercise its respective rights to require the
Substitute Option Issuer to repurchase the Substitute Option and the
Substitute Shares pursuant to this Section 9 by surrendering for such purpose
to the Substitute Option Issuer, at its principal office, the agreement for
such Substitute Option (or, in the absence of such an agreement, a copy of
this Agreement) and/or certificates for Substitute Shares accompanied by a
written notice or notices stating that the Substitute Option Holder or the
Substitute Share Owner, as the case may be, elects to require the Substitute
Option Issuer to repurchase the Substitute Option and/or the Substitute
Shares in accordance with the provisions of this Section 9.  As promptly as
practicable and in any event within five business days after the surrender of
the Substitute Option and/or certificates representing Substitute Shares and
the receipt of such notice or notices relating thereto, the Substitute Option
Issuer shall deliver or cause to be delivered to the Substitute Option Holder
the Substitute Option Repurchase Price and/or to the Substitute Share Owner
the Substitute Share Repurchase Price therefor or the portion thereof which
the Substitute Option Issuer is not then prohibited under applicable law and
regulation from so delivering.

          (c)  To the extent that the Substitute Option Issuer is prohibited
under applicable law or regulation from repurchasing the Substitute Option
and/or the Substitute Shares in part or in full, the Substitute Option Issuer
shall immediately so notify the Substitute Option Holder and/or the
Substitute Share Owner and thereafter deliver or cause to be delivered, from
time to time, to the Substitute Option Holder and/or the Substitute Share
Owner, as appropriate, the portion of the Substitute Option Repurchase Price
and/or the Substitute Share Repurchase Price, respectively, which it is no
longer prohibited from delivering, within five (5) business days after the
date on which the Substitute Option Issuer is no longer so prohibited;
provided, however, that if the Substitute Option Issuer is at any time after
delivery of a notice of repurchase pursuant to subsection (b) of this
Section 9 prohibited under applicable law or regulation from delivering to
the Substitute Option Holder and/or the Substitute Share Owner, as
appropriate, the Substitute Option Repurchase Price and the Substitute Share
Repurchase Price, respectively, in full (and the Substitute Option Issuer
shall use its best efforts to receive all required regulatory and legal
approvals as promptly as practicable in order to accomplish such repurchase),
the Substitute Option Holder and/or Substitute Share Owner may revoke its
notice of repurchase of the Substitute Option or the Substitute Shares either
in whole or to the extent of prohibition, whereupon, in the latter case, the
Substitute Option Issuer shall promptly (i) deliver to the Substitute Option
Holder or Substitute Share Owner, as appropriate, that portion of the
Substitute Option Repurchase Price or the Substitute Share Repurchase Price
that the Substitute Option Issuer is not prohibited from delivering; and
(ii) deliver, as appropriate, either (A) to the Substitute Option Holder, a
new Substitute Option evidencing the right of the Substitute Option Holder to
<PAGE>
purchase that number of Substitute Shares obtained by multiplying the number
of Substitute Shares for which the surrendered Substitute Option was
exercisable at the time of delivery of the notice of repurchase by a
fraction, the numerator of which is the Substitute Option Repurchase Price
less the portion thereof theretofore delivered to the Substitute Option
Holder and the denominator of which is the Substitute Option Repurchase
Price, and/or (B) to the Substitute Share Owner, a certificate for the
Substitute Option Shares it is then so prohibited from repurchasing.  If an
Exercise Termination Event shall have occurred prior to the date of the
notice by the Substitute Option Issuer described in the first sentence of
this subsection (c), or shall be scheduled to occur at any time before the
expiration of a period ending on the thirtieth day after such date, the
Substitute Option Holder shall nevertheless have the right to exercise the
Substitute Option until the expiration of such 30-day period.

          10.  Extension.  The 30-day, 6-month, 12-month, 18-month or 24-
month periods for exercise of certain rights under Sections 2, 6, 7, 9,
12 and 15 shall be extended:  (i) to the extent necessary to obtain all
governmental and regulatory approvals for the exercise of such rights (for so
long as the Holder, Owner, Substitute Option Holder or Substitute Share
Owner, as the case may be, is using commercially reasonable efforts to obtain
such regulatory approvals), and for the expiration of all statutory waiting
periods; (ii) during any period for which an injunction or similar legal
prohibition on exercise shall be in effect and (iii) to the extent necessary
to avoid liability under Section 16(b) of the Securities Exchange Act of
1934, as amended, by reason of such exercise.

          11.  Representations and Warranties.  (a)  Issuer hereby represents
and warrants to Grantee as follows:

          (i)  Issuer has full corporate power and authority to execute and
     deliver this Agreement and to consummate the transactions contemplated
     hereby.  The execution and delivery of this Agreement and the
     consummation of the transactions contemplated hereby have been duly and
     validly authorized by the Board of Directors of Issuer and no other
     corporate proceedings on the part of Issuer are necessary to authorize
     this Agreement or to consummate the transactions so contemplated.  This
     Agreement has been duly and validly executed and delivered by Issuer and
     constitutes a valid and legally binding obligation of Issuer enforceable
     in accordance with its terms.

         (ii)  Issuer has taken all necessary corporate action to authorize
     and reserve and to permit it to issue, and at all times from the date
     hereof through the termination of this Agreement in accordance with its
     terms will have reserved for issuance upon the exercise of the Option,
     that number of shares of Common Stock equal to the maximum number of
     shares of Common Stock at any time and from time to time issuable
     hereunder, and all such shares, upon issuance pursuant to the Option,
     will be duly authorized, validly issued, fully paid, nonassessable, and
     will be delivered free and clear of all claims, liens, encumbrances and
     security interests (other than those created by this Agreement) and not
     subject to any preemptive rights.

        (iii)  The execution, delivery and performance of this Agreement does
     not or will not, and the consummation by Issuer of any of the
     transactions contemplated hereby will not, constitute or result in (i) a
     breach or violation of or a default under, its articles or certificate
     of incorporation or by-laws, or the comparable governing instruments of
<PAGE>
     any of its subsidiaries, or (ii) a breach or violation of or a default
     under, any agreement, lease, contract, note, mortgage, indenture,
     arrangement or other obligation of it or any of its subsidiaries (with
     or without the giving of notice, the lapse of time or both) or under any
     law, rule, ordinance or regulation or judgment, decree, order, award or
     governmental or non-governmental permit or license to which it or any of
     its subsidiaries is subject.

          (b)  Grantee hereby represents and warrants to Issuer that Grantee
has full corporate power and authority to enter into this Agreement and,
subject to obtaining the approvals referred to in this Agreement, to
consummate the transactions contemplated by this Agreement; the execution and
delivery of this Agreement and the consummation of the transactions
contemplated hereby have been duly authorized by all necessary corporate
action on the party of Grantee; and this Agreement has been duly executed and
delivered by Grantee and constitutes a valid and legally binding obligation
of Grantee enforceable in accordance with its terms.

          12.  Assignment.  Neither of the parties hereto may assign any of
its rights or obligations under this Agreement or the Option created
hereunder to any other person, without the express written consent of the
other party, except that in the event a Triggering Event shall have occurred
prior to an Exercise Termination Event, Grantee, subject to the express
provisions hereof, may assign in whole or in part its rights and obligations
hereunder within twelve (12) months following such Triggering Event (or such
later period as provided in Section 10).

          13.  Filings; Other Actions.  Each of Grantee and Issuer will use
its best efforts to make all filings with, and to obtain consents of, all
third parties and regulatory and governmental authorities necessary to the
consummation of the transactions contemplated by this Agreement, including,
without limitation, notices and filings under HSR.

          14.  Total Profit.  (a)  Notwithstanding any other provision of
this Agreement, in no event shall the Grantee's Total Profit (as hereinafter
defined) exceed $ 275 million less the amount of any fee paid pursuant to
Section 8.02(b) of the Merger Agreement and, if it otherwise would exceed
such amount, the Grantee, at its sole election, shall either (i) reduce the
number of shares of Common Stock subject to this Option, (ii) deliver to
Issuer for cancellation Option Shares previously purchased by Grantee,
(iii) pay cash to Issuer, or (iv)  any combination thereof, so that Grantee's
actually realized Total Profit shall not exceed such amount after taking into
account the foregoing actions.

          (b)  Notwithstanding any other provision of this Agreement, this
Option may not be exercised for a number of shares as would, as of the date
of exercise, result in a Notional Total Profit (as defined below) of more
than $275 million less the amount of any fee paid pursuant to Section 8.02(b)
of the Merger Agreement; provided that nothing in this sentence shall
restrict any exercise of the Option permitted hereby on any subsequent date.

          (c)  As used herein, the term "Total Profit" shall mean the
aggregate amount (before taxes) of the following:  (i) the amount received by
Grantee pursuant to Issuer's repurchase of the Option (or any portion
thereof) pursuant to Section 7, (ii) (x) the amount received by Grantee
pursuant to Issuer's repurchase of Option Shares pursuant to Section 7, less
(y) the Grantee's purchase price for such Option Shares, (iii) (x) the net
cash amounts received by Grantee pursuant to the sale of Option Shares (or
<PAGE>
any other securities into which such Option Shares are converted or
exchanged) to any unaffiliated party, less (y) the Grantee's purchase price
of such Option Shares, (iv) any amounts received by Grantee on the transfer
of the Option (or any portion thereof) to any unaffiliated party, and (v) any
amount equivalent to the foregoing with respect to the Substitute Option.

          (d)  As used herein, the term "Notional Total Profit" with respect
to any number of shares as to which Grantee may propose to exercise this
Option shall be the Total Profit determined as of the date of such proposed
exercise assuming that this Option were exercised on such date for such
number of shares and assuming that such shares, together with all other
Option Shares (or any other securities into which such Option Shares are
converted or exchanged) held by Grantee and its affiliates as of such date,
were sold for cash at the closing market price for the Common Stock as of the
close of business on the preceding trading day (less customary brokerage
commissions).

          15.  Specific Performance.  The parties hereto acknowledge that
damages would be an inadequate remedy for a breach of this Agreement by
either party hereto and that the obligations of the parties hereto shall be
enforceable by either party hereto through injunctive or other equitable
relief.

          16.  Severability.  If any term, provision, covenant or restriction
contained in this Agreement is held by a court or a federal or state
regulatory agency of competent jurisdiction to be invalid, void or
unenforceable, the remainder of the terms, provisions and covenants and
restrictions contained in this Agreement shall remain in full force and
effect, and shall in no way be affected, impaired or invalidated.  If for any
reason such court or regulatory agency determines that the Holder is not
permitted to acquire, or Issuer is not permitted to repurchase pursuant to
Section 7, the full number of shares of Common Stock provided in Section 1(a)
hereof (as adjusted pursuant to Section 1(b) or Section 5 hereof), it is the
express intention of Issuer to allow the Holder to acquire or to require
Issuer to repurchase such lesser number of shares as may be permissible,
without any amendment or modification hereof.

          17.  Notices.  All notices, requests, claims, demands and other
communications hereunder shall be deemed to have been duly given when
delivered in person, by fax, telecopy, or by registered or certified mail
(postage prepaid, return receipt requested) at the respective addresses of
the parties set forth in the Merger Agreement.

          18.  Governing Law.  This Agreement shall be governed by and
construed in accordance with the laws of the State of Delaware.

          19.  Counterparts.  This Agreement may be executed in two or more
counterparts, each of which shall be deemed to be an original, but all of
which shall constitute one and the same agreement.

          20.  Expenses.  Except as otherwise expressly provided herein, each
of the parties hereto shall bear and pay all costs and expenses incurred by
it or on its behalf in connection with the transactions contemplated
hereunder, including fees and expenses of its own financial consultants,
investment bankers, accountants and counsel.
<PAGE>
          21.  Entire Agreement.  Except as otherwise expressly provided
herein or in the Merger Agreement, this Agreement contains the entire
agreement between the parties with respect to the transactions contemplated
hereunder and supersedes all prior arrangements or understandings with
respect thereof, written or oral.  The terms and conditions of this Agreement
shall inure to the benefit of and be binding upon the parties hereto and
their respective successors and permitted assignees.  Nothing in this
Agreement, expressed or implied, is intended to confer upon any party, other
than the parties hereto, and their respective successors except as assignees,
any rights, remedies, obligations or liabilities under or by reason of this
Agreement, except as expressly provided herein.

          22.  Captions; Capitalized Terms.  The Article, Section and
paragraph captions herein are for convenience of reference only, do not
constitute part of this Agreement and shall not be deemed to limit or
otherwise affect any of the provisions hereof.  Capitalized terms used in
this Agreement and not defined herein shall have the meanings assigned
thereto in the Merger Agreement.
<PAGE>
          IN WITNESS WHEREOF, each of the parties has caused this Agreement
to be executed on its behalf by its officers thereunto duly authorized, all
as of the date first above written.

                                       NORTHERN TELECOM LIMITED


                                       By:/s/ John A. Roth
                                          ----------------
                                       Name:
                                       Title:


                                       By:/s/ C.W. Scott
                                          --------------
                                       Name:
                                       Title:


                                       BAY NETWORKS, INC.


                                       By:/s/ David L. House
                                          ------------------
                                       Name:
                                       Title:




                                                                 EXHIBIT 99.2
       
BAY NETWORKS                                                            NORTEL
                                                              Northern Telecom

                                 News Release


FOR IMMEDIATE RELEASE                                            June 15, 1998

Nortel (Northern Telecom) and Bay Networks in US$9.1 Billion Transaction

Nortel's Acquisition of Bay Networks to Create a New Category of Company;

First to Offer Mission-Critical, Internet Protocol Integrated Networks


TORONTO and SANTA CLARA, CA - Nortel (Northern Telecom) (NYSE: NT/TSE: NTL),
one of the world's largest suppliers of digital network solutions, and Bay
Networks (NYSE: BAY), a leader in the worldwide data networking market, today
announced they have entered into a definitive merger agreement through which
Nortel will acquire Bay Networks. The estimated US$9. l billion transaction
is the largest to date among telecom and data network systems providers.

     The transaction creates a new category of company that will be the first
to deliver missioncritical Internet Protocol (IP) integrated networks that
will reach anyone, anytime, at any place in the world.  These next-generation
networks will unleash innovation and enable customers to gain competitive
advantage and realize their full business potential.

     The combined businesses will provide these networks, optimized for IP,
which carry voice, data and video from desktop to desktop across LAN (Local
Area Network), WAN (Wide Area Network) and carrier backbones, delivering new
levels of personalized service, flexible access, cost-efficiency,
scalability, security and adaptive performance with the reliability that
customers demand.

     On consummation of the merger, Bay Networks will continue to operate as
a wholly-owned subsidiary of Nortel.  Under the terms of the merger
agreement, Bay Networks shareholders will receive a fixed exchange ratio of
 .60 of a Nortel common share for each share of Bay Networks common stock.  As
a result of the merger, Nortel expects to issue approximately 134 million
common shares in the aggregate with respect to Bay Networks' outstanding
shares.  Based on the closing price of US$63.69 per share of Nortel (as of
Friday, June 12, l 998), this represents a price of US$38.2 l per share of
Bay Networks and US$9. l billion for the entire transaction, on a fully
diluted basis.  On the closing of the transaction, Bay Networks shareholders
will own approximately 2 l percent of Nortel.  The boards of directors of the
two companies have approved the transaction.

                                   - more -

<PAGE>
     Upon completion of the transaction, Nortel's Enterprise Data Networks
business will be integrated with Bay Networks' operations.  John Roth,
currently president and chief executive officer of Nortel, will remain chief
executive officer and a director of the corporation.  Dave House, chairman,
chief executive officer and president of Bay Networks, will become president
of Nortel and be appointed to the Nortel Board of Directors.  Bay Networks
will act as the focal point for Nortel's current and future data networking
business.

     "Dave House will bring IP networking expertise to all of Nortel's lines
of business, and that will benefit customers of our carrier, broadband,
wireless, and enterprise operations," said Mr. Roth.

     The consummation of the merger is subject to certain customary
conditions, including approval by shareholders of Bay Networks, compliance
with the Hart-Scott-Rodino Antitrust Improvements Act, and certain other
regulatory filings and approvals.  The transaction, which is expected to
close late in the third quarter of 1998, will be tax-free to Bay Networks
shareholders and will be accounted for by Nortel using purchase accounting.

A New Category of Company

     "This transaction creates a new category of company suited to this era -
- - an era of end-toend, mission-critical IP networks," said Mr. Roth.  "Our
combined business will be ideally constructed to meet this need, in terms of
complementary expertise, products, and distribution. Because of the lack of
overlap, we can focus strictly on meeting the needs of our customers, not on
rationalizing the combined business.  With this transaction, Nortel and Bay
Networks will effectively break out and redefine the center of the
information industry - the unoccupied space where data and voice networks,
driven by the Internet, are expected to converge," he said.

     "This is another step in the direction in which we have been moving all
along," said Mr. House.  "The Web has changed everything.  The public network
is moving rapidly from voice to data.  A new class of company must emerge to
meet the demand for IP technology and networking expertise, with the ability
to build carrier-class, mission-critical networks.  That company is Nortel
and Bay Networks.  Together, we will create next-generation networks that
spark the next wave of innovation and revolutionize the way we work, learn
and play."

Profile of the Combined Business

     This new category of company will combine the best of both worlds - the
time-to-market and agility demanded in the enterprise data market, and the
backbone capacity and ruggedness required in the telecommunications network
environment.  It will incorporate the best practices of both companies and
focus on mutual strengths - a shared vision of network evolution, emphasis on
providing value to customers and a commitment to anticipate and lead
marketplace needs.

                                   - more -

<PAGE>
     New network solutions must provide new value proposition -- a
boundary-less network offering that encompasses Enterprise LANs, WANs, edge
gateways, service provider access, collect and backbone networks, end-to-end
flow, and policy and service management.  Nortel will deliver this value
proposition to both enterprise and carrier customers.

     Following the merger, Nortel will be able to reach a wider range of
customers through one of the most diverse distribution networks in the
industry.  Nortel will build on Bay Networks' well-established channels of
distribution, as well as its significant presence in the enterprise and
Internet Service Provider markets.  Nortel will also capitalize on its
growing direct sales force and strong distribution channels for a full range
of the combined companies' networking systems products, including Bay
Networks' Accelar switch routing for high performance backbone networking and
gigabit LANs, and Nortel's Passport ATM networking products.  By enhancing
customer choice and availability, Nortel expects to be able to accelerate the
deployment of Webtone to a broader range of customers worldwide.

     The transaction will create a US$ 17.7 billion entity (based on 1997
calendar sales) that will operate globally and have more than 80,000
employees.  Nortel's premise is to leverage the financial and strategic
strengths of both businesses, and create long-term growth that will be
superior to what either Nortel or Bay Networks might otherwise achieve on a
standalone basis. Before acquisition-related items, the transaction is
expected to be dilutive in 1998 and slightly accretive to Nortel's earnings
per share in 1999.

Financial Advisors, Other Information

     Deutsche Bank Securities Technology Group acted as financial advisor to
Nortel for this transaction, while Morgan Stanley represented Bay Networks.

     Nortel works with customers in more than 150 countries and territories
to design, build and integrate their communications products and advanced
digital networks.  Nortel had 1997 revenues of US$15.5 billion, and has
approximately 73,000 employees worldwide.

     Nortel has been a major player in the WAN data market and 1997 revenues
from its data and multimedia portfolio totaled US$785 million.  The
acquisition of Micom Communications Corp. in June 1996 significantly
strengthened Nortel's access portfolio.  Nortel has since taken several
additional initiatives, including, in 1998, its investment in Avici Systems,
Inc. (terabit routing), and the acquisition of two leading-edge start-up
companies - Broadband Networks Inc. (broadband wireless) and Aptis
Communications, Inc. (remote access).  Entrust Technologies Inc., a Nortel
subsidiary, has been a pioneer in the area of Internet security.  Nortel has
also become the leading provider of optical networks.  Over 70 percent of
backbone Internet traffic in North America is transmitted over Nortel optical
systems.  In addition, Nortel is one of the world's largest providers of
wireless systems infrastructure, and is well positioned to bring to market
broadband wireless systems for data, voice, and Internet access services.

                                   - more -

<PAGE>
     Bay Networks, Inc. is a leader in the worldwide networking market,
providing a complete line of products that serve corporate enterprises,
service providers and telecommunications carriers.  The company offers frame
and ATM switches, routers, shared media, remote and Internet access
solutions, IP services and network management applications, all integrated by
Bay Networks' Adaptive Networking strategy.  Bay Networks markets its
products and services around the world, providing 7x24 support coverage.

                                     - end

For more information:
Nortel                                   Bay Networks
Peter Janecek                            Mike Deshaies
Media Relations                          Media Relations
(905) 863-6251                           (408) 495-3292

[email protected]                  [email protected]
Pager: (416) 378-8176

Bob Kaye                                 Sandra Toms
Investor Relations                       Investor Relations
(905) 863-6044                           (408) 495-1181
[email protected]                      [email protected]

Or visit Nortel's website at www.nortel.com
Or visit www.baynetworks.com
Or visit www.merger-news.com

 


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