SHIVA CORP
10-K/A, 1997-10-08
COMPUTER COMMUNICATIONS EQUIPMENT
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		     SECURITIES AND EXCHANGE COMMISSION
			   WASHINGTON, D.C. 20549

				 FORM 10-K/A

			Amendment No. 1 to Form 10-K

(Mark One)
/X/             ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d)
		   OF THE SECURITIES EXCHANGE ACT OF 1934
		 For the fiscal year ended December 28, 1996

/ /           TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d)
		   OF THE SECURITIES EXCHANGE ACT OF 1934
		 For the Transition period from      to      
						-----   -----

		       Commission File Number 0-24918

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

       Massachusetts                                            04-2889151
(State or other jurisdiction of                               (IRS Employer
incorporation or organization)                              Identification No.)

		     28 Crosby Drive, Bedford, MA 01730
	(Address of principal executive offices, including Zip Code)

			       (781) 270-8300
	    (Registrant's telephone number, including area code)

			   ---------------------
	 Securities Registered Pursuant to Section 12(b) of the Act:
				    None
	 Securities Registered Pursuant to Section 12(g) of the Act:
			Common Stock, $.01 par value
	Series A Junior Participating Preferred Stock, $.01 par value
			      (title of class)

Indicate by check mark whether the registrant (1) has filed all reports re-
quired to be filed by Section 13 or 15(d) of the Securities Exchange Act of
1934 during the preceding 12 months (or such shorter period that the registrant
was required to file such reports), and (2) has been subject to such filing
requirements for the past 90 days.  YES  X   NO
					---     ---

Indicate by check mark if disclosure of delinquent filers pursuant to Item 405
of Regulation S-K is not contained herein, and will not be contained, to the
best of the registrant's knowledge, in definitive proxy or information
statements incorporated by reference in Part III of this Form 10-K or any
amendment to this Form 10-K. [ ]

The aggregate market value of the voting stock held by non-affiliates of the
registrant was approximately $483,592,478 based on the closing price of the
Common Stock on the Nasdaq Stock Market on January 31, 1997. The number of
shares outstanding of the registrant's Common Stock as of January 31, 1997
was 28,989,583.

		    DOCUMENTS INCORPORATED BY REFERENCE

1.   Portions of the registrant's Proxy Statement for the Annual Meeting of
     Stockholders to be held May 14, 1997 are incorporated by reference in Part
     III hereof.
2.   Portions of the registrant's 1996 Annual Report to Stockholders for the
     fiscal year ended December 28, 1996 are incorporated by reference into
     Parts I,  II and IV hereof.

<PAGE>                                1

			      EXPLANATORY NOTE

This Form 10-K/A of Shiva Corporation is filed solely to amend the Exhibit
Index included herein.

<PAGE>                                 2


Item 14.     Exhibits, Financial Statement Schedules And Reports On Form 8-K

(a)(1)       Consolidated Financial Statements.
	     ----------------------------------

The following consolidated financial statements and the Report of Independent
Accountants are included in the Company's 1996 Annual Report to Stockholders
and are incorporated herein by reference.  

     Report of Independent Accountants for the years ended December 28, 1996,
December 30, 1995 and December 31, 1994
     Consolidated Balance Sheet as of December 28, 1996 and December 31, 1995
     Consolidated Statement of Operations for the years ended December 28,
1996, December 30, 1995 and December 31, 1994
     Consolidated Statement of Changes in Stockholders Equity for the years
ended December 28, 1996, December 30, 1995 and December 31, 1994
     Consolidated Statement of Cash Flows for the years ended December 28,
1996, December 30, 1995 and December 31, 1994
     Notes to Consolidated Financial Statements. 

The Company's 1996 Annual Report to Stockholders is not to be deemed filed as
part of this report except for those parts thereof specifically incorporated
herein by reference. 

<TABLE>
(a)(2)       Financial Statement Schedules.
	     ----------------------------
<CAPTION>
									Page
	      <S>                 <C>                                   <C>
	      Schedule I          Report of Independent Accountants on
				  Financial Statement Schedule          S-1

	      Schedule II         Valuation and Qualifying Accounts     S-2
</TABLE>
Schedules not listed above have been omitted because they are not applicable,
not required, or the information required to be set forth therein is included
in the consolidated financial statements or the notes thereto. 

(a)(3)        List of Exhibits.  The following exhibits are filed as part of,
or incorporated by reference into, this report on Form 10-K:  

<TABLE>
<CAPTION>
Exhibit No.   Description of Exhibits
- -----------   -----------------------
<S>           <C>
3.1*          Restated Articles of Organization of the Company. (1)(5)

3.2*          Restated By-Laws of the Company. (1)

4.1*          Specimen certificate representing the Common Stock. (8)

4.2*          Rights Agreement dated as of September 29, 1995, between the
	      Company and American Stock Transfer & Trust Company, which
	      includes as Exhibit A the Form of Certificate of Vote of
	      Directors Establishing a Series of a Class of Stock, as Exhibit
	      B the Form of Rights Certificate, and as Exhibit C the Summary
	      Rights to Purchase Preferred Stock. (4)

10.1*         Registration Rights Agreement dated as of September 3, 1991 by
	      and among the Company and the Investors named therein, as amended
	      by the Amendment to Registration Rights Agreement dated as of
	      March 29, 1993, as further amended by the Amendment No. 2 to
	      Registration Rights Agreement dated as of July 28, 1993 and as
	      further amended by an Amendment dated June 13, 1995. (3)

<PAGE>

10.2*         Amended and Restated 1988 Stock Plan, as further amended. (3)(6)

10.3*         1994 Non-Employee Director Stock Option Plan. (1)(6)

10.4*         1994 Employee Stock Purchase Plan. (1)(6)

10.5+*        1997 Employee Bonus Plan (6)

10.6*         Employment Agreement dated September 15, 1994 by and between the
	      Company and Frank A. Ingari. (1)(6)

10.7*         Letter Agreement dated January 27, 1994 by and between the
	      Company and Cynthia M. Deysher. (2)(6)

10.8*         Letter Agreement dated January 2, 1996 by and between the
	      Company and Guy A. Daniello. (6)

10.9*         Incentive and Non-Qualified Stock Option Agreement dated October
	      19, 1993 between the Company and Frank A. Ingari. (1)(6)

10.10*        Incentive and Non-Qualified Stock Option Agreement dated January
	      29, 1994, between the Company and Cynthia M. Deysher. (1)(6)

10.11*        Agreement dated May 15, 1995 between the Company and Northern
	      Telecom Limited ("Nortel") (3)

10.12*        Letter Agreement dated March 15, 1996 between the Company and
	      Nortel to amend the Agreement dated May 15, 1995 between the
	      Company and Nortel (7)

10.13*        First Amendment dated May 16, 1996 to the Agreement dated May
	      15, 1995 between the Company and Nortel (7)

10.14+        Memorandum of Understanding ("MOU") dated September 11, 1996
	      between the Company and Nortel

10.15+        Second Amendment dated October 15, 1996 to the Agreement dated
	      May 15, 1995 between the Company and Nortel

10.16+        Memorandum of Understanding ("MOU") dated December 23, 1996
	      between the Company and Nortel

10.17*        Letter Agreement dated January 29, 1997 amending the Memorandum
	      of Understanding dated December 23, 1996 between the Company and
	      Nortel

10.18*        Lease by and between Beacon Properties, L.P., Landlord, and the
	      Company, Tenant, ("Beacon Lease") dated September 5, 1995. (4)

10.19*        Amendment #1 to the Beacon Lease, dated October 23, 1995 (8)

10.20*        Amendment #2 to the Beacon Lease, dated January 17, 1996 (8)

10.21*        Lease by and between Walford Company c/o Bernard H. Kayden,
	      Landlord, and the Company, Tenant, ("Walford Lease") dated May
	      24, 1996 (7)

11.1*         Statement re: Computation of Per Share Earnings

13.1*         1996 Annual Report to Stockholders, certain portions of which
	      have been incorporated herein by reference.

<PAGE>

21.1*         Subsidiaries of the Company.

23.1*         Consent of Price Waterhouse LLP

23.2*         Consent of Deloitte & Touche LLP

27*           Financial Data Schedule

- -------------
<FN>
*    Previously filed.
+    Confidential treatment requested as to certain portions, which portions
     are omitted and filed separately with the Securities and Exchange
     Commission.
(1)  Incorporated herein by reference to the Company's Registration Statement
     on Form S--1 (File No. 33-84884)
(2)  Incorporated herein by reference to the Company's Annual Report on Form
     10-K for the fiscal year ended December 31, 1994
(3)  Incorporated herein by reference to the Company's Registration Statement
     on Form S-1 (File No. 33-94134)
(4)  Incorporated herein by reference to the Company's Registration Statement
     on Form S-1 (File No. 33-97216)
(5)  Incorporated herein by reference to the Company's Registration Statement
     on Form S-3 (File No. 333-602)
(6)  Indicates a management contract or any compensatory plan, contract or
     arrangement with officers who are designated as named executive officers
     in the Company's 1997 Proxy Statement.  
(7)  Incorporated herein by reference to the Company's Quarterly Report on Form
     10-Q for second quarter 1996.  
(8)  Incorporated herein by reference to the Company's Annual Report on Form
     10-K for fiscal year 1995. 
</TABLE>

(b)  Reports on Form 8-K

The Company filed no reports on Form 8-K during the last quarter of the fiscal
year ended December 28, 1996.  

<PAGE>                                3
				       
				 SIGNATURES

Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange
Act of 1934, the registrant has duly caused this Amendment No. 1 to Form 10-K
to be signed on its behalf by the undersigned, thereunto duly authorized.  

Date: October 8, 1997                      SHIVA CORPORATION
					   (Registrant)


					   By: /s/ Larry Whitman
						-----------------
					       Larry Whitman
					       Vice President - Corporate
					       Controller
					       (Principal Financial and
					       Accounting Officer)

<PAGE>                                4


			      INDEX TO EXHIBITS
<TABLE>
<CAPTION>
Exhibit No.  Description of Exhibits
- -----------  -----------------------
<S>          <C>
3.1*         Restated Articles of Organization of the Company. (1)(5)

3.2*         Restated By-Laws of the Company. (1)

4.1*         Specimen certificate representing the Common Stock. (8)

4.2*         Rights Agreement dated as of September 29, 1995, between the
	     Company and American Stock Transfer & Trust Company, which
	     includes as Exhibit A the Form of Certificate of Vote of Directors
	     Establishing a Series of a Class of Stock, as Exhibit B the Form
	     of Rights Certificate, and as Exhibit C the Summary Rights to
	     Purchase Preferred Stock. (4)

10.1*        Registration Rights Agreement dated as of September 3, 1991 by and
	     among the Company and the Investors named therein, as amended by
	     the Amendment to Registration Rights Agreement dated as of March
	     29, 1993 as further amended by the Amendment No. 2 to Registration
	     Rights Agreement dated as of July 28, 1993 and as further amended
	     by an Amendment dated June 13, 1995. (3)

10.2*        Amended and Restated 1988 Stock Plan, as further amended. (3)(6)

10.3*        1994 Non-Employee Director Stock Option Plan. (1)(6)

10.4*        1994 Employee Stock Purchase Plan. (1)(6)

10.5+*       1997 Employee Bonus Plan (6)

10.6*        Employment Agreement dated September 15, 1994 by and between the
	     Company and Frank A. Ingari. (1)(6)

10.7*        Letter Agreement dated January 27, 1994 by and between the Company
	     and Cynthia M. Deysher. (2)(6)

10.8*        Letter Agreement dated January 2, 1996 by and between the Company
	     and Guy A. Daniello. (6)

10.9*        Incentive and Non-Qualified Stock Option Agreement dated October
	     19, 1993 between the Company and Frank A. Ingari. (1)(6)

10.10*       Incentive and Non-Qualified Stock Option Agreement dated January
	     29, 1994, between the Company and Cynthia M. Deysher. (1)(6)

10.11*       Agreement dated May 15, 1995 between the Company and Northern
	     Telecom Limited ("Nortel") (3)

10.12*       Letter Agreement dated March 15, 1996 between the Company and
	     Nortel to amend the Agreement dated May 15, 1995 between the
	     Company and Nortel (7)

10.13*       First Amendment dated May 16, 1996 to the Agreement dated May 15,
	     1995 between the Company and Nortel (7)

10.14+       Memorandum of Understanding ("MOU") dated September 11, 1996
	     between the Company and Nortel

10.15+       Second Amendment dated October 15, 1996 to the Agreement dated May
	     15, 1995 between the Company and Nortel

10.16+       Memorandum of Understanding ("MOU") dated December 23, 1996 be-
	     tween the Company and Nortel

10.17*       Letter Agreement dated January 29, 1997 amending the Memorandum of
	     Understanding dated December 23, 1996 between the Company and
	     Nortel

10.18*       Lease by and between Beacon Properties, L.P., Landlord, and the
	     Company, Tenant, ("Beacon Lease") dated September 5, 1995. (4)

10.19*       Amendment #1 to the Beacon Lease, dated October 23, 1995 (8)

10.20*       Amendment #2 to the Beacon Lease, dated January 17, 1996 (8)

10.21*       Lease by and between Walford Company c/o Bernard H. Kayden,
	     Landlord, and the Company, Tenant, ("Walford Lease") dated May 24,
	     1996 (7)

11.1*        Statement re: Computation of Per Share Earnings

13.1*        1996 Annual Report to Stockholders, certain portions of which have
	     been incorporated herein by reference.

21.1*        Subsidiaries of the Company.

23.1*        Consent of Price Waterhouse LLP

23.2*        Consent of Deloitte & Touche LLP

27*          Financial Data Schedule

- -------------
<FN>
*    Previously filed.
+    Confidential treatment requested as to certain portions, which portions
     are omitted and filed separately with the Securities and Exchange
     Commission.
(1)  Incorporated herein by reference to the Company's Registration Statement
     on Form S--1 (File No. 33-84884)
(2)  Incorporated herein by reference to the Company's Annual Report on Form
     10-K for the fiscal year ended December 31, 1994
(3)  Incorporated herein by reference to the Company's Registration Statement
     on Form S-1 (File No. 33-94134)
(4)  Incorporated herein by reference to the Company's Registration Statement
     on Form S-1 (File No. 33-97216)
(5)  Incorporated herein by reference to the Company's Registration Statement
     on Form S-3 (File No. 333-602)
(6)  Indicates a management contract or any compensatory plan, contract or
     arrangement with officers who are designated as named executive officers
     in the Company's 1997 Proxy Statement.  
(7)  Incorporated herein by reference to the Company's Quarterly Report on Form
     10-Q for second quarter 1996.
(8)  Incorporated herein by reference to the Company's Annual Report on Form
     10-K for fiscal year 1995. 
</TABLE>

<PAGE>                                5



CONFIDENTIAL MATERIAL OMITTED AND FILED SEPARATELY WITH THE SECURITIES AND 
EXCHANGE COMMISSION.  ASTERISKS DENOTE SUCH OMISSIONS.

							       Exhibit 10.14

   
Memorandum of Understanding between Nortel and Shiva for the OEM Development,
	    and Support of the Shiva AccessPort********************
    

The purpose of this M.O.U. is to summarize the discussions between Shiva and
Nortel to date, and to confirm the respective intent with respect to the 
proposed transaction.  Nortel and Shiva plan to develop and sign a contract,
by October 15, 1996, which will be based on the terms and conditions as 
outlined in this M.O.U.

Manufacturing Rights

   
- -  Nortel shall have the option to manufacture the Rapport*******************
   ********, within the duration of the contract, according to Shiva's design
   specifications.  A proposed ****** fee, paid to Shiva for the manufacturing
   license, will be negotiated.  Reasonable manufacturing transfer and
   consulting assistance, will be negotiated.  Shiva will make the final
   decision as to ******************* the AccessPort.  If ******************** 
   the Shiva AccessPort for *******, the *************************.
    

   
- -  With Shiva's agreement, Nortel shall be *********** to manufacture the
   AccessPort, for Shiva ************* and Shiva's ********************** 
   ***********.  Shiva has the right to ********** from a ******************.
    

- -  Nortel shall pay Shiva a royalty, as defined in the royalty structure
   section, below, for the ************ shipped to Nortel ********** directly,
   or via Nortel's ***************************.

Royalty Structure

- -  Nortel shall pay Shiva a royalty equivalent to a **************** of *** of
   the ****** price of the product for volumes of ***** units or greater, over
   a ******** period, or a *************** of **** of the ******* price of the 
   product for volumes less than ****** units, over a ******* period.  In each 
   case, Nortel will pay a ***** of **** royalty for each product within the 
   ********** of the agreement, or for the ********* units (whichever comes 
   first), if the **** or **** royalty is below *****.  After the ********, or 
   ********* units, the *** or *** royalty shall only apply.  Shiva and Nortel 
   will negotiate an ******** royalty structure ***** **** units (or ********, 
   whichever comes first), and for Nortel *********, in the contract.

- -  A three months rolling forecast will be provided on a monthly basis (same 
   as with ********) as well as a first year forecast for business planning 
   purposes, independent of *************** direction.

- -  Prior to Nortel **************, Nortel will work with Shiva to *********** 
   product/components ***************************.  Any ************* or 
   *********************** will be ***************** to Nortel.

Annual Maintenance and Support

- -  Shiva will provide ******** level support to Nortel, for the *************, 
   similar to that described in Section 7 and Exhibit H of the Shiva/Nortel 
   Agreement of May 15, 1995 for the ************ product.

- -  Nortel agrees to pay Shiva ****** for support of the **********, as 

<PAGE>

CONFIDENTIAL MATERIAL OMITTED AND FILED SEPARATELY WITH THE SECURITIES AND 
EXCHANGE COMMISSION.  ASTERISKS DENOTE SUCH OMISSIONS.

   described in Section 7 and Exhibit H of the Shiva/Nortel Agreement of May 
   15, 1995 for the ********* product, in the ************** period, with 
   support fees for subsequent years to be negotiated by the parties.

Shiva Software Upgrades

- -  During the term of any period for which Nortel has paid the agreed-upon 
   annual maintenance and support fee, Shiva agrees to provide all Shiva 
   software upgrades to Nortel *************************************.  Any 
   *************** of Shiva upgrades will be negotiated between the parties.

- -  Nortel will be the ************* of ******************* software to Nortel 
   customers (e.g. alpha trial, beta trial, early adopter trial, release 
   version) ************************************************************ 
   ************************.

Nortel OEM Requirements

   
- -  Nortel will re-label (Nortel branding) the Shiva AccessPort, similar to the 
   Rapport*********** and ************* products.
    

- -  Shiva shall, on an ongoing basis, ************** the software, hardware and 
   documentation, as is currently done for the ************.  Details will be 
   identified in the contract.

   
- -  Shiva shall certify Nortel's ************* based on the Nortel priority 
   certification list as used for the Rapport*********, for those *********** 
   which both Shiva and Nortel intend to sell their respective products.
   Nortel will only be responsible for Nortel specific certification in those
   countries where Nortel intends to sell the ************and which Shiva has
   no intention of seling their AccessPort. If Nortel manufactures the ****
   ******and recertification is required in countries where Nortel intends to
   sell, or is selling, the *************then Nortel will be responsible for 
   Nortel specific certification.
    

   
- -  Shiva shall provide Nortel with a project plan for each release of the 
   AccessPort software and/or hardware (including *************).
    

- -  Nortel shall have the option to ************** the *********** for specific 
   Nortel customers, requiring ************************.

****************************** Features

    
- -  It is Nortel's intention to ******************* with ************ features 
   and functions *******************************.  Nortel and Shiva will 
   determine which **************** is most appropriate for ************* the 
   requested features ********************************************************
   ****************************************************************.  These 
   functions will include, but are not limited to, the following:

     *******************************
	 *****************************
     ***********Rapport***************
	 *****************************
	 ***********************
	 *********************************

Notes:  1. The**********Rapport*********************** will be sold as part of 
	   the ******Rapport brand.  
    

Intellectual property rights associated with *********************** that 
***********************************************************************.  

<PAGE>

CONFIDENTIAL MATERIAL OMITTED AND FILED SEPARATELY WITH THE SECURITIES AND 
EXCHANGE COMMISSION.  ASTERISKS DENOTE SUCH OMISSIONS.

Intellectual property rights associated with ******************************** 
***************************************************************************** 
with ******************************************************** determined by 
agreement between the parties.  Intellectual property rights associated with 
**************************************************************************** 
*************************** with ******************************************* 
*********** determined by agreement between the parties.

This document is a M.O.U. only.  Both parties will, in good faith, adhere to 
the terms and conditions as outlined in this M.O.U. until a contract is 
signed, at which point the contract will be legal and binding and supersede 
this M.O.U.  Both parties agree to negotiate and sign a contract no later than 
October 15, 1996, *********************************************.


/s/ Micky Tsui                            /s/ Ed Gregory
- ------------------------                  -----------------------------
Micky Tsui                                Ed Gregory
AVP Internet Solutions                    VP Business Development
Nortel                                    Shiva Corporation


<PAGE>








CONFIDENTIAL MATERIAL OMITTED AND FILED SEPARATELY WITH THE SECURITIES AND
EXCHANGE COMMISSION.  ASTERISKS DENOTE SUCH OMISSIONS.

							       Exhibit 10.15
			      AMENDMENT 2
			Shiva/Nortel Agreement

This Second Amendment to the Agreement dated as of 15 May 1995 (the
"Agreement') is made as of the 15th day of October, 1996, by and between
Northern Telecom Limited ("Nortel"), on behalf of itself and its affiliates
(as defined in the Agreement), a Canadian corporation having its principal
place of business 8200 Dixie Road, Suite 100, Brampton, Ontario, Canada, and
Shiva Corporation ("Shiva"), a Massachusetts corporation having its
principal place of business at 28 Crosby Drive, Bedford, Massachusetts,
01730, USA.

WHEREAS, Nortel and Shiva want to amend the Agreement to reflect the
following changes to the original Agreement;

   
OEM AccessPort**************** Amendment
    

   
A ************************* of Shiva's current Shiva AccessPort*********
************* product (OEM AccessPort************** or *****************
*******) will be added to the Agreement.  *********** will include ******
******* and ********** of the AccessPort to ********* in the ***********
******** and specified *******************.  Nortel will have the right to
manufacture the Rapport*********** pursuant to the manufacturing rights set
forth in this Amendment.
    

NOW, THEREFORE, the parties agree to amend the Agreement as follows,

1.0   Definitions
1.1   New Definition.  In addition to the terms defined in the Agreement,
each of the following additional terms shall have the meaning ascribed to it
below:

   
      1.1.1  OEM AccessPort or Rapport *********** shall mean the *********
Shiva AccessPort***************** product as described in Exhibit R and
Exhibit S;
    

   
2.0   ****************** of the OEM AccessPort
2.1   Shiva's Obligations.  Shiva will ********* the OEM AccessPort
********************************, as described in the Nortel AccessPort
**************** as set forth in Exhibit R and Exhibit S.
    

   
2.2   Nortel's Obligations.  Nortel will ****** the ******* contemplated in
Section 2.1 and ************ for the OEM AccessPort as set forth in Exhibit
R.
    

   
2.3   Ownership of the OEM AccessPort.  Intellectual property rights
associated with ************* features that ************** using *********-
provided tool kits shall be owned by ********. 
    


   
Intellectual property rights associated with *************** features that
********** using ******* software and/or hardware shall be owned by ********
with **************************************** of such features determined by

<PAGE>

CONFIDENTIAL MATERIAL OMITTED AND FILED SEPARATELY WITH THE SECURITIES AND
EXCHANGE COMMISSION.  ASTERISKS DENOTE SUCH OMISSIONS.

agreement between the parties. ******* hereby grants, with a full reservation
of rights, to ******* a worldwide, ************, ************** perpetual
license of such intellectual property rights to use, modify, sublicense,
support, copy and distribute through multiple tiers of distribution,
including ********* distributors, these intellectual property rights solely
as they are incorporated into the OEM AccessPort.  ********* hereby grants
back to ******* a **********, worldwide, ***********, perpetual license
to such modifications.  ***************************************************
**************************************************************************
*************************OEM AccessPort.
    

   
Intellectual property rights associated with ****** developed modifications
using ******* developed software and/or hardware, including, but not limited
to, ******************** and the ********************************** product,
(**** will be reviewed and determined between the parties), as described in
Exhibit S, shall be owned by ***** with ************************************
of such features to ****** to be determined by agreement between the parties.
****** hereby grants to ****** a worldwide, *************, ****************
perpetual license of such intellectual property rights to use, modify, create
derivative works, support, and copy these intellectual property rights solely
as they are incorporated into the Shiva AccessPort.  ***** hereby grants back
to ******* a **************, worldwide, *************, perpetual licwense to
modifications.
    

   
3.0   Manufacturing Rights
3.1   License Grant.  Shiva hereby grants Nortel the option to manufacture
the Rapport*************** at anytime, within the duration of the contract,
according to Shiva's design specifications.  
    

   
3.2   Shiva's Obligations. If Nortel elects to manufacture the OEM AccessPort
subject to the terms of this Amendment, Shiva shall provide reasonable
manufacturing transfer and consulting assistance as part of the license fee
described in Section 3.3.  Reasonable manufacturing transfer and consulting
assistance shall include the following:
    
      (1) **********************************
      (2) *************************
      (3) ****************************************
      (4) *********************************************
      (5) **************************************
      (6) *********************************
      (7) ***************************
      (8) *****************************************
      (9) *********************************
     (10) ******************************************
     (11) ******************************************************************
	  **********
   
3.3   Nortel's Obligations.  Nortel shall pay ***************************
********** to Shiva for rights to manufacture the OEM AccessPort and for
reasonable consultation and training to assist Nortel with their initial
manufacturing production run, as well as reasonable ongoing manufacturing
support.  Nortel will share with Shiva, product and quality improvement
ideas as part of the ongoing process, as referenced in items 3.5 and 3.6, as
well as include a comment such as "Access By Shiva" (to be determined by
Shiva) in all ********** documentation, to *******************************
**********************************.  In addition Nortel shall

<PAGE>

CONFIDENTIAL MATERIAL OMITTED AND FILED SEPARATELY WITH THE SECURITIES AND
EXCHANGE COMMISSION.  ASTERISKS DENOTE SUCH OMISSIONS.

pay Shiva a royalty, as defined in the royalty structure section 4.0 below,
for the **************** to Nortel *************** directly, or via Nortel's
******************************.
    

   
3.4   Shiva Manufacturing Option.  If Nortel is ********************** the
Shiva AccessPort *********, the *******************************************
license fee shall **********.  With Shiva's agreement, Nortel shall be 
*********************** the AccessPort for Shiva ************ and Shiva's
********************************.  Shiva has the right to ********** from ***
*****************************.
    

3.5   Shiva Manufacturing Consulting Support. Shiva will provide Nortel with
reasonable consultation and training to assist Nortel with their initial
manufacturing product run at Nortel as well as reasonable ongoing
manufacturing support.  Nortel will share with Shiva, product and quality
improvement ideas as part of the ongoing process.

      Reasonable consultation, training and ongoing manufacturing support are
defined as follows:

      A total of ****************** of support will be provided to Nortel by
Shiva ******************************************************************* to
assist Nortel with their initial manufacturing production run, and will be
effective with the signing of this Amendment.  *****************************
****************************************************************************.
This *************** ongoing support related to changes resulting from the
ECO/ECR process as well as Shiva's quarterly Manufacturing/Design review
meetings.

3.6   Qualification Support.   Nortel and Shiva agree to discuss proposed
design and/or component changes, as well as share component sourcing
information, on an ongoing basis.  Nortel will be proactively included in
Shiva's ECO/ECR process as well as Shiva's quarterly Manufacturing/Design
review meetings.  Major design discontinuities will require agreement
between the parties and costs associated with the design discontinuities
will be determined by the parties.

   
      Shiva will ********************************************************
(as listed in the document "Functional Specification for the Nortel
AccessPort") for the Rapport*************.  Nortel will not generally be
responsible for the associated costs.  In those countries where *********
*************************************requires incremental cost over and
above that incurred by*******for the AccessPort********will review those
costs with*******and decide whether or not to*****************************
*******************************will incur the cost of******************
*************************.
    

4.0   Royalty Structure
Nortel shall pay Shiva a royalty equivalent to a ****************** of ***
************* of the ******* price ************ of the product for volumes
of ***************** units or greater, over a ****************** period,
or a ********************************** of the *************** price of the
product for volumes less than ************************ units, over a ******
******* period.  In each case, Nortel will pay a ******* of a *************
******** royalty for each product within the *********** of the Agreement,
or for the ********************* units (whichever comes first), if the
*************** or *************** royalty is ************************.

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********  After the ********, or ****************** units, **************
************* royalty shall apply with a************************* in the
********** and a ************************** in the *********************.
Royalties for ****************** will be negotiated between the parties.  A
three months rolling forecast will be provided on a monthly basis (same as
with **********) as well as a first year forecast for business planning
purposes, independent of ***************** direction.  Prior to Nortel
manufacturing, Nortel will work with Shiva to purchase product/components
directly from current Shiva suppliers, with the option to source from Nortel
vendors of choice, with Shiva's prior agreement.  In addition, Nortel and
Shiva will discuss the options of sharing costs and sourcing of metal/
plastics components of tooling.  Any component or overhead cost reductions
will be passed through to Nortel.

Royalties for Nortel's ********************* will be calculated ***********
**********************************************************, e.g. royalties
owed would be calculated *************************************************
**************************************************************************
*****************************.

5.0   Annual *************, Maintenance and Software Support
5.1   Maintenance and Support
Shiva will provide ******** level support to Nortel, for the ************,
similar to that described in Section 7 and Exhibit H of the Shiva/Nortel
Agreement of May 15, 1995 for the ******* product.  Nortel agrees to pay
Shiva ********************************************* for maintenance and
support of the *********, as described in Section 7 and Exhibit H of the
Shiva/Nortel Agreement of May 15, 1995 for the ********* product, for the
duration of this Agreement.  During the term of any period for which Nortel
has paid ************************************************, Shiva agrees to
provide all Shiva software upgrades to Nortel ******************************
*******************.

5.2   **************************
Shiva will provide Nortel with a ********* of **************************
*************** and *****************************************************.
Nortel agrees to pay Shiva ***********************************************
*********************************.  Nortel will be the **************** of
Nortel ************ software to **************** (e.g., alpha trial, beta
trial, early adopter trial, release version) *****************************
****************************************************************************
****************************************************************************
*****************************************************************************
****************************************************************************
***************************************.

6.0   General Changes to Agreement.
6.1   Exhibit R.  Exhibit R is added to the Agreement.
Exhibit S.  Exhibit S is added to the Agreement

6.2   Other Terms.  Except as set forth above, all other terms and conditions
of the Agreement remain unchanged.]


<PAGE>

IN WITNESS of this Second Amendment to the Agreement the parties have
executed this document on the dates set forth below.


SHIVA CORPORATION                   NORTHERN TELECOM LIMITED




Signature:/s/ Cynthia M. Deysher    Signature:/s/ John Ryan
	  ----------------------              ---------------------
Name:   Cynthia M. Deysher          Name:   John Ryan

Title:  Senior Vice President,      Title:  Vice President/General Manager,
	Finance and Administration,         Multimedia and Internet Solutions
	and CFO                             Enterprise Networks 



				    Signature:/s/ David Archibald
					      -------------------

				    Name:   David Archibald

				    Title:  VP and Deputy General Counsel

<PAGE>


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			       Exhibit R
		      OEM AccessPort Project Plan

		     NORTEL AccessPort Project Plan
			   Rapport ************

Revision History
Version   Author               Date       Comments

1.2       John Terzakis        10/15/96   Added review comments
1.1       John Terzakis        09/06/96   Added review comments
1.0       John Terzakis        08/28/96   Draft


			    Table of Contents

1.  Executive Summary                                                      
2.  Scope and Target Audience                                             4
3.  Related Documents                                                     4
4.  Deliverables                                                          5
5.  Engineering and Documentation                                         5
5.1 Hardware                                                              5
5.2 Standards and Approvals                                               5
5.3 Firmware                                                              5
5.4 Software                                                              6
5.5 Documentation and Online Help                                         6
5.6 Quality Assurance and Testing                                         6
6.  Manufacturing                                                         6
7.  Support and Service                                                   6
8.  Training                                                              7
9.  Marketing                                                             7
10. Estimated Costs                                                       7
10.1 Hardware                                                             7
10.2 Standards and Approvals                                              7
10.3 Firmware                                                             7
10.4 Software                                                             8
10.5 Documentation and Online Help                                        8
10.6 Quality Assurance                                                    8
10.7 Project Management                                                   9
10.8 Manufacturing Costs                                                  9
10.9 Overall Cost - Phase I                                              10
11. Schedule of Deliverables                                             10
12. Staffing                                                             11
13. Nortel Dependencies                                                  11
14. Shiva Dependencies                                                   11
15. Risks and Issues                                                     12


Executive Summary
The Rapport *********** is a family of ************************************
******************************************************************The first
release of the Rapport *********** supports the following major features:
   *************************************************************************
   **********************
   *************************
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   ********************
   **********************************************
   ***************************************************
   ****************************************
   **********************************
   *********************************************************
   ****************************************************************
   *****************************************************************
   ********

The Rapport *********** family is based on the Shiva AccessPort product line.
All labels, software and other markings will be ******************.
At initial release, the Rapport *********** will be available ******
****************************.  ***************** will be distributed in
************************************* will be distributed in ***************
*****.  The software and documentation will be on 3.5" diskettes (subsequent
releases may be on CD-ROM).  In addition to the system unit and diskettes,
the shipping box will also include ************************************
*****************.  The Reference Guide will be packaged external to the
shipping box.  It may be included inside the box in a subsequent release,
space permitting.  

Scope and Target Audience
This document is intended for use by Shiva and Nortel engineering,
documentation/information engineering, support, marketing, and
manufacturing/operations departments for the development and planning of the
Nortel Rapport *******************.

This document does not provide detailed descriptions of the features of the
Rapport *********** family, nor does it provide a full functional and
technical specification of the product family.  For a complete functional
and technical specification, see the related document ***********
****************************************.

This document does include the following information:
   An explanation of the primary features of the Rapport *********** product
   family
   Shiva and Nortel deliverables for the project
   Manpower and cost estimates for the Nortel modifications
   A schedule for the project

Related Documents
**********************************************************************
****************************
***************************************************************************
*************************************
****************************************************************************
****************************
***************************************************************************
***************************************************

Deliverables
The deliverables for the Rapport *********** are listed below.
***********************************
************
************
    *****************************************
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    *****************************************
    **************************************
    ********************************************
**************************************
**********************
    *************
    ****************
    ***************
    *****************
    **********************************************************
***************************************
************************************
    **********************
    ***********************
    *****
    **********

Note:  All software, firmware, documentation, labels and other markings will
be **************.

Engineering and Documentation
This section describes the modifications required to the standard Shiva
AccessPort product to create a Nortel Rapport *********** product.

Hardware
The hardware components for the Shiva AccessPort include:
    ***
    *************************************
    *********
    ******

No modifications are presently required for ***********************.  Shiva
will obtain **********************************************************
********.  ****************************************************** Shiva or
AccessPort **************************** Nortel or Rapport ***********.

Standards and Approvals
Shiva has obtained (and is in the process of obtaining) various ************
*************** approvals for the AccessPort product.  ***** will submit the
required paperwork to the same regulatory agencies to obtain approvals for
the Nortel Rapport *******************.  A list of the required approvals
can be found in the document ****************************************
***********.  The costs of these approvals are ***********************
*********************. Approvals for ************* will have **************.

Firmware
******************************** AccessPort firmware **********.  The
following items will have to be modified:
    ************
    ************
    *************

**********************************************.  For a complete list of
firmware features, consult the document *********************************
******************.

Software
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The standard software components for the Shiva AccessPort include:
    *********************************************************
    ******************************************
    *************************************************************************
    *******
    ***************************************************

The parts of the software that will require modification for Nortel include:
    *****
    ******************************
    *********************************************
    *********************************
    *************************
    *************
In addition, labels on diskettes and/or CD-ROMs will be ******************.
A detailed description of these software components and the specific
modifications required to them appear in the document ***********
****************************************.

Documentation and Online Help
The standard components of the Shiva AccessPort documentation and online help
include:
    **********************************************************************
    *******
    ***************************
    ******************************
    *******************************************************************
    ********************
    ************************************
    ****************************************************

Shiva will *************************** with the ******************
**********.  Shiva will provide Nortel with the release notes, readme
documents, Reference Guide and Quick Start Guide so that Nortel can ********
****************.  The *********************** will not be available for the
first release.  Nortel  may produce its own version based on the Shiva
AccessPort ******.

All software and documentation will be on 3.5" diskettes for Nortel. 

Quality Assurance and Testing
Once the Nortel ********************** have been made to the software and
firmware, the entire product will be subjected to ****************** by the
*****************************.  In addition, the online help files and
documentation will be checked for **********************.  

It is anticipated that there will be close collaboration between the Nortel
and Shiva Quality Assurance groups during the entire development process.
****************************************************************************
Rapport ****************************************************.

Manufacturing
***** will manufacture the initial production units of the Rapport ****
*****************.  It is anticipated that *******************************
manufacture of the product.  ***** will provide *******************
****************** to manufacture the product, as specified in the contract
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Support and Service
****** will provide level 1 and level 2 support for the Rapport ***********.
***** will provide level 3 support.  Details and cost of this support and
service are specified in the contract.

Training
******************************************************Rapport*************
and the AccessPort******************************************************
********************AccessPort**************************.  Any additional
training requirements (on site at Nortel, instructor notes, etc.) will have
to be negotiated.  *****************************************************
********************************************************************
***************************.

Marketing
Project-specific marketing tasks will be developed in the context of an
overall Nortel marketing plan developed through the close collaboration of
the Shiva and Nortel marketing teams.  These tasks will not be tracked as
part of the project.

However, the Nortel marketing team is expected to provide information and
updates on any requirements for marketing activities (e.g., equipment for
trade shows, photo shoots, demonstration purposes, etc.) as soon as possible
to the Nortel and Shiva project leaders.  This ensures proper planning and
assists in determining the existence of any schedule conflicts.

Estimated Costs
The estimated manpower and costs for the tasks associated with the*******
**********************AccessPort appear in the following sections. These
are for reference purposes only and *************************************
*******************************************************.

Hardware
All changes to the AccessPort hardware required for *************** will be
handled by *******************.  ************************** are presently
anticipated.

Standards and Approvals
***** will submit the necessary paperwork to obtain agency approvals (as
listed in the document **************************************** AccessPort")
for the Rapport ***********.


Task                                        Estimated Cost
					      (man-weeks)
Engineering support for agency approvals           *
			  # of man-weeks           *
				   TOTAL          *****

Firmware
The Shiva AccessPort firmware ****************************************.


Task                                        Estimated Cost
					      (man-weeks)
***** Firmware                                     *
			 # of man-weeks            *
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				  TOTAL           *****

Software
The *********************************************************************
***************************************************************************
***************************** in the Shiva AccessPort software *******
************************************ will be **************.



Task                                        Estimated Cost
					      (man-weeks)
Modifications to **************                    *
Modifications to **************************        *
Modifications to ******************                *
			    # of man-weeks         *
				     TOTAL        ****

NOTE:  The initial release of the Rapport *********************************
******************************.  When a Shiva AccessPort module is
******************************************************************** will be
required to *******************.

Documentation and Online Help
**************** the online help files with the appropriate ******
**********.  All other documentation will be *****************.  Shiva will
provide Nortel with those documents.


Task                                        Estimated Cost
					      (man-weeks)
********* Customization & Testing                  *
Project Management                                 *
			    # of man-weeks         *
				     TOTAL        *****

NOTE:  The initial release of the Rapport *********************************
******************************.  When a Shiva AccessPort module is
*************************************************************************
****** will be required to *******************.

Quality Assurance
In addition to the development testing of each of the components of the
project, ******************************** is responsible for testing the
Rapport *********** product as a whole, including *************************
*****************.  These tests will be run based upon the standard test
plans used for the base Shiva product line.

The Quality Assurance cost estimate does not include ************************
*************************************************************


Task                                        Estimated Cost
					      (man-weeks)
Design Test Plan                                   *
Execute Test Plan                                  *
			    # of man-weeks         *
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				     TOTAL        *****

Project Management
The Rapport *********** project will require ********************************
************************************************* has overall project
responsibility:  *****************************************************
***********************************************************************
**********************************************************************
********************************************.  The elapsed time for the
project is *******.  Project management will be required at about ********
for most of the project.

Description                                 Estimated Cost
					      (man-weeks)
Project Management                                 *
			    # of man-weeks         *
				     TOTAL        *****

Manufacturing Costs
The Rapport *********** will require **********************************
**************************************************************************
(************************.  In addition, manufacturing support will be
required for *******************************************************
***********************************.

Task                                        Estimated Cost
					      (man-weeks)
Manufacturing Support ********************         *
			    # of man-weeks         *
				    TOTAL          *****

NOTE:  This estimate does not include *************************************
**********************************************.  ********************.

Overall Cost - Phase I
The total non-reoccurring engineering and additional costs for the first
phase of project are as follows:

Task                                        Estimated Cost
					       (dollars)
Hardware                                        **
Standards and Approvals                         *****
Firmware                                        *****
Software                                        *****
Documentation & Online Help                     *****
Quality Assurance                               *****
Project Management                              *****
Manufacturing costs                             *****
				    TOTAL       *****

Schedule of Deliverables
The initial milestones for the Rapport *********** project are shown below.

Milestone                                                    Who      Date

Preliminary ************************************             *****    *******
Preliminary ************************************************ *****    *******
********** AccessPort **************************             *****    *******
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********** AccessPort **************************             *****    *******
Shiva AccessPort ***                                         *****    *******
********** AccessPort ***********************                *****    ******
Nortel ***********************************************       ******   ******
Preliminary **********************                           *****    ******
Preliminary **********************************               *****    ******
Nortel **************************                            *****   ********
Nortel **************************                            *****   ********
Nortel ***********************************                   *****   ********
Nortel ************************                              ******  ********
Nortel ***************************                           ******  ********
Nortel AccessPort ***                                        *****   ********
Nortel AccessPort ***                                        *****   ********
Nortel AccessPort *************************                  *****   ********

Staffing
Shiva
*********************************************
**********************
**********************
**********************
***********************************************
****************************************************
*****************************************************
****************************************************

Nortel
***********************************************
****************************
************************************************
*************************************************
**************************
******************************

Nortel Dependencies
The following is a list of Nortel dependencies that affect the schedule.
*****************************************************************************
*****
    *************************************************
    *****************************************
    **************************************************
    *************************************************************
    ********************************************
    ***********************************************

Shiva Dependencies
The following is a list of Shiva dependencies that affect the schedule.
    ****************************************************

Risks and Issues
The following will be a list of risks and open issues that affect the
schedule.
Risks:
**  ********* in the Shiva AccessPort ************************************
    ****** the Rapport ********************.
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Issues:
1.  ****** requirements ********************************** of the Rapport
    ****
******.
2.  Any change in the ******************** for the Rapport *****************
    *******************.
    

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				 Exhibit S
			  Nortel OEM Requirements

Nortel will ************************** the Shiva AccessPort, similar to the
Rapport ******************************. Shiva shall, on an ongoing basis,
**************************************************************************
***************, for the annual *************************.

Shiva shall certify Nortel's *********** based on the Nortel priority
certification list as used for the Rapport *********, for those countries
which both Shiva and Nortel intend to sell their respective products. 
Nortel will only be responsible for Nortel specific certification in those
countries where Nortel intends to sell the *********** and which Shiva has
no intention of selling their AccessPort.  If Nortel manufactures the ****
****** and re-certification is required in countries where Nortel intends to
sell, or is selling, the ***********, then Nortel will be responsible for
Nortel specific certification. 

***** shall provide ****** with a project plan for each release of the
AccessPort software and/or hardware (**************************.

Nortel shall have the option to ******************************************
**************************************************.  An annual fee *******
********** and is *******************************************************
***********************.

Nortel Specific (Proprietary) Features

It is Nortel's intention to **********************************************
*************************************************.  Nortel and Shiva will
determine which development approach is most appropriate for delivering the
requested features *******************************************************
*****************************************************************.  These
functions will include, but are not limited to, the following:
************************
	***********************
**************************************
	**********************************
	********************
	*******************************

Notes:  1. ***************************************** will be sold as part
of the Nortel Rapport *****.  

The project plan for the ***************************** product will be
developed by **************** and will be finalized ***********************
**********************************************************************
************************************************************************
***********************************.
    


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							  Exhibit 10.16

		      Memorandum of Understanding


This Memorandum of Understanding (MOU), effective as of December 23, 
1996 between Shiva Corporation, (hereinafter "Shiva"), having executive 
offices 28 Crosby Drive, Bedford Massachusetts, 01730, U.S.A., and 
Northern Telecom Inc. on behalf of itself and its Affiliates, 
Subsidiaries, and for the benefit of Joint Venture partners (hereinafter 
"Nortel") having offices at 2221 Lakeside Blvd., Richardson, TX 75083.  
This MOU is intended by the parties to be used solely for the purpose of 
negotiating a new agreement which would supersede the existing agreement 
between the parties dated May 15, 1995.  The new agreement will reflect 
the following items:

   a) The transition from a **************** payment schedule to a 
      ************** payment model. 

   b) Right to Manufacture and ******************* Distribution for 
      Rapport *****************************************************
      *********** into the ********** and ********** (herein referred to 
      *********** *********** are defined as ************************* 
      ****************************************************************
      *****************************************************************
      **********************************************************.

   c) Right to Distribute Worldwide into the ***************** will be 
      in accordance with the terms outlined in Section 5.1.

   d) Under this new agreement, the parties will make Joint Investments
      in product development.  ***** investments will be directed toward
      ************************* while ****** investments will focus on
      **************************************************************.  
      Rights to the resultant intellectual property is as described in
      Paragraph 4.3 of this MOU.

     The following sections of this MOU are legally binding on both 
parties; Sections 1.1, 1.4, 2.1.1, 2.1.2, 2.2.1, 2.2.2, 2.2.4, 2.3, 5.2. 
Any further agreement resulting from such negotiation  is subjected to 
management and legal approval of both companies. 

Overall Objective:   The ************************** and **************** 
***** is in ****************************************************.  The 
joint resources and skills, together with the ********************* of 
both companies ***************************************************.   
This new agreement allows for ***** to be **************************** 
********************************************************************** 
****************************************************.

Intent:   It is the intention of both parties to proceed in good faith
negotiations for all activities and to conclude a definitive agreement of
************* term before January 31, 1997.

<PAGE>

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Points of Contact:

Shiva:  Bob Darabant                      Nortel:  Micky Tsui
Senior Director, Worldwide OEMs           AVP, Internet Solutions


		       MOU Terms and Conditions

1.   **********************:
 
1.1   ****** grants ******** worldwide ***********************, whereby 
************ is defined as ****************************************** 
************************************** **************************** 
*******************************.  ***************** will be ******* in 
the definitive agreement.  Both parties agree to update **************** 
************* on a quarterly basis to ********************* subject to 
mutually acceptable criteria.

1.2   ****** will, upon signing of this MOU **************************** 
***********, where possible, ******************************************* 
**********, and will work with ********************************.  This 
includes, but is not limited to, the ********************************** 
*****************************.  The parties understand that ***********
***************************************************************.

   
1.3   In the event that *********************************************** 
***************************************, ***** will *******************, 
where possible, with Nortel Rapport and ******************************* 
***********************************************************************
****************.
    

1.4   This ************ set forth in Section 1.1 may only be ***********
subject to mutually agreed upon ********** performance measured against 
specific ********* metrics, which may *******************************, 
**********************************************************************
***************************.  The ******************* metrics will be 
established as part of the definitive agreement and will be reviewed and 
adjusted on a periodic  basis.  A notification period, which will be 
agreed upon in the definitive agreement, is required under any situation 
whereby this ***************************************.  In the event the 
parties are unable to reach a definitive agreement, ******************** 
************************************************************************
************************************************************************
********************************, will be due.

1.5        ***** agrees that the ******************************* will not, 
during the period of ************************************************ 
**********************************************************************
***********************************************************************
**********************************************************************
***************************************************.  ******* reserves 
the right to ********************************************************** 
***********************************************************************
*******************************.

2.   Right to Manufacture and Royalties

<PAGE>


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2.1   Shiva grants Nortel worldwide manufacturing rights for the Rapport 
*** and for ********************************************************** 
*********************.  The **** fee covers all manufacturing rights for 
hardware and software associated with the product, transfer 
manufacturing know-how package, and assistance for manufacturing start-
up in one Nortel manufacturing facility.  Reasonable additional 
assistance will be provided with the ******************************* to 
be determined in the definitive agreement.  Nortel has the right to 
manufacture in multiple facilities globally.
    

   
2.1.1   ******* agrees to a ************************* fee *********** 
******* for the worldwide manufacturing rights of the Rapport****.  This 
payment will be due ***************************************.  Nortel 
further agrees to an additional ************* for paid up manufacturing 
rights to all ******************for the Rapport**** including, but not 
limited to, ********************************************.  This ******* 
*********** fee will be paid ******* after the acceptance of the ** 
**************.  This combined ************************************** 
for Rapport *** product, which **************************************** 
**********************************************************to the Rapport
******************.
    

2.1.2   Shiva grants Nortel worldwide manufacturing rights for ********* 
**************************************************** product *****  or 
********************** and all *************************, for a ******* 
************************.  This product ***************************** 
*****.  This *** payment will be due ******* after Nortel acceptance of 
the product.

2.2   Royalties

2.2.1   Shiva grants to Nortel worldwide distribution rights of the 
products listed in Section 2.1 for the ******************* as defined in 
Section 1.1 at a royalty rate of *********************** price of the 
product.  

2.2.2   Upon signing of this MOU, Nortel agrees to ********************
***********************************************************************
*************************************************************.  Nortel 
will issue purchase orders committing ******************************** 
************************************************************************
This payment will give Nortel **************************************** 
******************** described in Section 2.2.1 and ****************** 
**************************************** as described in Section 1.4.

2.2.3   In 1997 and prior to any notification of *********** of the 
**********************, Nortel agrees to *********************** of 
************ on the *********************************** with payment 
terms of ***********.  Payment of these ************************* is 
******** upon ****** meeting its *****************************.  These 
*************** will be further defined and scheduled as part of the 
definitive agreement.  Purchase orders for these *********** will be 
issued prior to the end of each **********************.  These payments 
will also give **************************************** as defined in 
Section 2.2.1 above.

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2.2.4   At the end of 1997, ****************************************** 
****************************************************************.  These 
***********************************************************************
**********************************.  The amount applied will not exceed 
*****************************************************.  In the event of 
notification that **************************************, there will be 
no *******************************************.  In the event that total 
**********************************************, the difference will be 
calculated within *********************************** and ************* 
********************** payment terms.

2.2.5   For product obtained by ****** for ***************, ********** 
will owe ********************** calculated on the ******************** 
******************************************.  These ****************** 
will be included in the ******************* as described in paragraph 
2.2.4.

2.3   In the event the definitive agreement is not reached within the 
allotted time frame stated above, the ******************************* of 
********* (referenced in paragraph 2.2.2) will fully apply to ******** 
***************.  These ************ will be ******* under the ******** 
***************************** through ******************************* 
********************************************

2.4   ****** grants to ******* access to ***************************** 
********** under the terms of this Agreement.  During this period, 
rights for ***************, including *******, will be granted by ***** 
on substantially similar conditions as agreed to in this Amendment, 
subject to the mutual agreement of both parties.

2.5   ***** grants to ******* the right to ************** from ***** 
******** at ******* plus handling and inventory services fee at *****
**********************.  ******* agrees to provide a firm forecast 
for such orders subject to a mutually agreed forecast schedule and 
process.  This process will be further defined in the definitive 
agreement.  Shiva agrees to *************************************** 
********* to Nortel.

3.   Service **************************

3.1  ****** agrees to ********* provided **************************** 
***************** dedicated to support ****** global ***************** 
and ******.  The intent of this ****** is to increase ****** sales into 
****************************** worldwide.  The ******* structure, 
functions, mode of operations between ****** and *** will be established 
as part of the definitive agreement.

3.2   ******* agrees to ***** the ***** of this ***** to ********* in 
*****, ** in *****, ** in *****, and to ** in *****.  Only the first two 
******** are ******** (***************** will be charged to ******, but 
not more than ***************** in ***** and **************** in *****, 
unless mutually agreed).  *********** for ***************************** 
will be reviewed and approved in early ****.  ******* will only **** the 
*********** incurred by this ******* 

3.3   Shiva agrees to ************************************************ 
subject to the **********.  ********* has right to review and approve 

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AND EXCHANGE COMMISSION.  ASTERISKS DENOTE SUCH OMISSIONS.


the ***************************** to this ***** for the sole purposes of 
********************************************.  These ************* will 
continue to be on *************** but ************** to *******.  Shiva 
and *************** will be subjected to ************************** and 
**************************, as part of the definitive agreement.

4.   R&D

4.1   ****** agrees, *****************, to ****** the ************ with 
************************************* for a total of **************** in 
****.  The *************** will be based on specific ****************** 
which **************************** within the **************** and is 
agreed to by ********

4.2   ****** agrees to ****************************** in ***** in R&D 
related to **************************************************** which 
also apply to the **************************.

4.3 As additional *********************, ***************** as described 
in paragraph 4.1, ********* shall receive the following:

   (a)  rights to *****************************************************
	**************************************, as required by *******;
   (b)  a list of committed ****************************************** 
	*************;
   (c)  for those ****** that are specific to ************************** 
	******************************, at a minimum, at the time the 
	agreement is terminated, each party will ***** the other party a 
	************************************************************** 
	************************************************************* 
	****************************, during the term of the agreement, 
	Shiva agrees ************************************************* 
	******************************************************.

The parties agree to determine the specific rights in the definitive 
agreement.

4.4   Shiva agrees to include ************************************* and 
****************** as part of the ****************************.

4.5   Both parties agree to include ********************************* 
********************** as part of definitive agreement.

5.   Product Purchases

5.1   ******** has the option to purchase product from Shiva at the 
following ****************************************

   5.1.1:   ************************************
   5.1.2:   *************************************************
	    *******************************************************

   
   The equivalent of ******************************************* will 
be ******** to the **************************************** as described 
in Section 2.2.2 provided the ******************* does ***************** 
******Nortel Rapport *****.
    

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CONFIDENTIAL MATERIAL OMITTED AND FILED SEPARATELY WITH THE SECURITIES
AND EXCHANGE COMMISSION.  ASTERISKS DENOTE SUCH OMISSIONS.

   
5.2   Upon signing of this MOU, ****** agrees to ********************* 
******************for Rapport *****************************************
*********************************************************************
******* also agrees to ********************************************** 
******************for Rapport ****************************************
Shiva agrees to ****************************************************** 
************************************************************************
****************  The terms of ************************, will be agreed 
to as a part of the definitive agreement, **************************** 
******************************* shall apply with appropriate changes.
    

6.   General

6.1   This agreement does not affect in any form the existing contract 
on ******** and ****************.

6.2   Services and Support:  Shiva agrees to provide service and support 
levels *************************************, including but not 
limited to *****************************************************, and 
*******************************.  Modifications to the current service 
and support agreement will be agreed to as part of  the definitive 
agreement.

   
7.   Co-Marketing:  Nortel agrees to provide ********************** of 
************* in the Rapport product consistent with the *********** 
********** concept.  Label and art work to be mutually agreed to.
    

8.   Termination:
Both parties agree to address in the definitive agreement conditions and 
disposition of ******************************************************** 
**********************************************:
     -*********************************;
     -************************.

9.   Disclosure

9.1   Disclosure by either party ************************************ 
**************************** will be made only pursuant to the terms 
and conditions of the ************************************************ 
****************************

9.2   ***************************************************************
**********************************************************************
*********************************************.

This MOU shall remain in force and effect until January 31, 1997, or if 
canceled in writing by either party.  Cancellation of this MOU shall not 
release both parties regarding sections:  1.1, 1.4, 2.1.1, 2.2.2, 2.2.1, 
2.2.2, 2.2.4, 2.3, and 5.2.  This MOU may only be extended by the mutual 
agreement of both parties. 


AGREED BY:

SHIVA CORPORATION                         NORTHERN TELECOM INC.

<PAGE>

By: /s/ Woody Benson                      By: /s/ Richard Faletti
- --------------------                      -----------------------

Name: Woody Benson                        Name: Richard Faletti

Title: Senior Vice President              Title: Vice Presdient, NTI

Date: 12/24/96                            Date: 12/23/96


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