EXHIBIT 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the incorporation by reference in the registration statement on
Form S-8 of General DataComm Industries, Inc. of our report dated January 4,
2005 relating to our audits of the consolidated balance sheets of General
DataComm Industries, Inc. as of September 30, 2004 and 2003 and the related
consolidated statements of operations, stockholders' deficit and cash flows for
the years then ended and the related schedule, which report appears in the
September 30, 2004 annual report on Form 10-K of General DataComm Industries,
Inc. Our report contains an explanatory paragraph that states that the Company
has both a working capital and stockholders' deficit, has limited ability to
obtain new financing and during fiscal 2005 may be unable to comply with
financial loan covenants related to its restructured secured indebtedness, all
of which raise substantial doubt about its ability to continue as a going
concern. The financial statements do not include any adjustments that might
result from the outcome of this uncertainty.

/s/ Eisner LLP

New York, New York
April 7, 2005

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