EX-5.1
                   Opinion of Wilson Sonsini Goodrich & Rosati


                                                                     Exhibit 5.1


                                                 May 23, 2001


At Comm Corporation
557 Airport Boulevard, Suite 700
Burlingame, CA 94010

         Re: At Comm Corporation (the "Company")  Registration Statement on Form
S-3

Ladies and Gentlemen:

         We have  examined  the  Registration  Statement on Form S-3 to be filed
with the Securities and Exchange Commission (the "Registration  Statement"),  in
connection with the  registration  under the Securities Act of 1933, as amended,
of a shelf offering of 1,082,000 shares of the Company's common stock, $0.01 par
value  per  share  (the  "Shares").  As  your  counsel,  we  have  examined  the
proceedings proposed to be taken in connection with the sale and issuance of the
above-referenced securities.

         It is our opinion that the Shares are legally and validly issued, fully
paid and non-assessable.

         We consent to the use of this opinion as an exhibit to the Registration
Statement,  and further consent to the use of our name wherever appearing in the
Registration  Statement,  including the Prospectus  constituting a part thereof,
and any amendment thereto.

                                             Very truly yours,

                                             WILSON, SONSINI, GOODRICH & ROSATI
                                             Professional Corporation

                                             By: /s/ Thomas C. Klein, Esq.
                                             -----------------------------------
                                                     Thomas C. Klein, Esq.





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