<PAGE>
EXHIBIT 23.1
CONSENT OF ERNST & YOUNG LLP, INDEPENDENT AUDITORS
We consent to the reference to our firm under the caption "Experts" in the
Amended Registration Statement (Form S-4) and related Proxy Statement/Prospectus
and to the incorporation by reference therein of our report dated July 26, 1999,
with respect to the consolidated financial statements and schedule of ACT
Networks, Inc. included in its Annual Report (Form 10-K) for the year ended June
30, 1999, filed with the Securities and Exchange Commission.
/s/ Ernst & Young LLP
Woodland Hills, California
July 5, 2000
