<PAGE>
Exhibit 23.2
CONSENT OF ERNST & YOUNG LLP, INDEPENDENT AUDITORS
We consent to the reference to our firm under the Caption "Experts" in the
Registration Statement (Form S-3) and related Prospectus of Terayon
Communication Systems, Inc. for the registration of 2,969,062 shares of its
common stock and to the incorporation by reference therein of our report dated
September 1, 2000, with respect to the financial statements and schedule of
Mainsail Networks, Inc. included in Terayon Communication Systems, Inc.'s
Current Report on Form 8-K/A filed on October 18, 2000 with the Securities and
Exchange Commission.
/s/ Ernst & Young LLP
San Jose, California
October 18, 2000