EXHIBIT 8.1

                [Letterhead of Heller Ehrman White & McAuliffe]


                              September 30, 1999


Newbridge Networks Corporation
600 March Road
P.O. Box 13600
Kanata, Ontario K2K 2E6
Canada


Ladies and Gentlemen:

     This opinion is being delivered to you in connection with the Form S-4
Registration Statement (the "Registration Statement") filed pursuant to the
Agreement and Plan of Merger dated as of June 22, 1999, as amended (the "Merger
Agreement"), detailing the proposed merger (the "Merger") of Saturn Acquisition
Corp., a Delaware corporation ("Merger Sub"), a wholly-owned subsidiary of
Newbridge Networks Corporation, a Canadian corporation ("Newbridge"), with and
into Stanford Telecommunications, Inc., a Delaware corporation ("Stanford").

     Except as otherwise provided, capitalized terms used but not defined herein
shall have the meanings set forth in the Merger Agreement by and among
Newbridge, Merger Sub, and Stanford.  All "section" references, unless otherwise
indicated, are to the Internal Revenue Code of 1986, as amended (the "Code").

     We have acted as U.S. tax counsel to Newbridge in connection with the
Merger.  As such, and for the purpose of rendering this opinion, we have
examined, and are relying upon (without any independent investigation or review
thereof) the truth and accuracy at all relevant times (including without
limitation the Effective Time) of, the statements, covenants, representations,
and warranties contained in the following documents (including all exhibits and
schedules attached thereto):


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September 30, 1999
Page 2


     (a)  the Merger Agreement;

     (b)  those tax representation letters delivered to us by Newbridge and
          Stanford pursuant to the Merger Agreement (the "Tax Representation
          Letters");

     (c)  the Registration Statement; and

     (d)  such other instruments and documents related to the formation,
          organization, and operation of Newbridge, Merger Sub, and Stanford and
          related to the consummation of the Merger and the other transactions
          contemplated by the Merger Agreement as we have deemed necessary or
          appropriate.

     In connection with rendering this opinion, we have assumed (without any
independent investigation or review thereof) that:

     (a)  Original documents submitted to us (including signatures thereto) are
          authentic, documents submitted to us as copies conform to the original
          documents, and all such documents have been (or will be by the
          Effective Time) duly and validly executed and delivered where due
          execution and delivery are a prerequisite to the effectiveness
          thereof;

     (b)  All representations, warranties, and statements made or agreed to by
          Newbridge, Merger Sub, and Stanford, their managements, employees,
          officers, and directors in connection with the Merger, including but
          not limited to, those set forth or described in the Merger Agreement
          (including the exhibits thereto), the Registration Statement, and the
          Tax Representation Letters are true and accurate at all relevant
          times;

     (c)  All covenants contained in the Merger Agreement (including exhibits
          thereto) and the Tax Representation Letters are performed without
          waiver or breach of any material provision thereof;

     (d)  The Merger will be reported by Newbridge, Merger Sub, and Stanford on
          their respective federal income tax returns in a manner consistent
          with the opinion set forth below;


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September 30, 1999
Page 3

     (e)  Any representation or statement made "to the best of knowledge" or
          similarly qualified is correct without such qualification;

     (f)  The Registration Statement, the Merger Agreement, and the Tax
          Representation Letters reflect all the material facts relating to the
          Merger, Newbridge, Merger Sub, and Stanford;

     (g)  The Merger will qualify as a statutory merger under the laws of the
          State of Delaware; and

     (h)  As to all matters as to which any person or entity represents that it
          is not a party to, does not have, or is not aware of any plan,
          intention, understanding or agreement, there is in fact no such plan,
          intention, understanding or agreement.

     Based on our examination of the foregoing items and subject to the
limitations, qualifications, and assumptions set forth herein, we are of the
opinion that:

     1.  If the Merger is consummated in accordance with the Merger Agreement,
for United States federal income tax purposes:  (a) the Merger will be a
reorganization within the meaning of Section 368(a)(1) of the Code, and (b)
Newbridge, Merger Sub, and Stanford will each be a party to that reorganization
within the meaning of Section 368(b) of the Code.

     2.  The discussion entitled "Material United States Federal Income Tax
Consequences" set forth in the Proxy Statement, insofar as it relates to
statements of law and legal conclusions, is correct in all material respects.

     This opinion is limited to the federal income tax consequences of the
Merger and does not address the various state, local, or foreign tax
consequences that may result from the Merger or the other transactions
contemplated by the Merger Agreement.  In addition, no opinion is expressed as
to any federal income tax consequence of the Merger or the other transactions
contemplated by the Merger Agreement except as specifically set forth herein,
and this opinion may not be relied upon except with respect to the consequences
specifically discussed herein.  No opinion is expressed as to the federal income
tax treatment that may be relevant to a particular investor in light of personal
circumstances or to certain types of investors subject to special treatment
under the federal income tax laws (for example, life insurance companies,
dealers in securities, taxpayers subject to the alternative minimum tax in the
year in which the Merger occurs, banks, tax-exempt


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September 30, 1999
Page 4


organizations, non-United States persons, stockholders who exercise dissenter's
rights, and stockholders who acquired their shares of Stanford stock pursuant to
the exercise of options or otherwise as compensation or who hold their Stanford
stock as part of a straddle or risk reduction transaction). To the extent that
any of the representations, warranties, statements, and assumptions material to
our opinion and upon which we have relied are not accurate and complete in all
material respects at all relevant times, our opinion could be adversely affected
and should not be relied upon.

     This opinion is not binding on the Internal Revenue Service or any court of
law, administrative agency or other governmental body and represents only our
judgment as to the likely outcome if the federal income tax consequences of the
Merger were properly presented to a court of competent jurisdiction.  Our
conclusions are based on the Code, existing judicial decisions, administrative
regulations, and published rulings as in effect on the date hereof.  No
assurance can be given that future legislative, judicial, or administrative
changes or interpretations will not adversely affect the accuracy of our
conclusions.  Nevertheless, by rendering this opinion, we undertake no
responsibility to advise you of any new developments in the application or
interpretation of the federal income tax laws.

     We consent to the reference to our firm under the caption "Material United
States Federal Income Tax Consequences" in the Proxy Statement included in the
Registration Statement and to the reproduction and filing of this opinion as an
exhibit to the Registration Statement.  In giving this consent, however, we do
not admit that we are in the category of persons whose consent is required under
Section 7 of the Securities Act of 1933, as amended.

                              Very truly yours,


                              /s/ HELLER EHRMAN WHITE & MCAULIFFE