<PAGE>
Exhibit 23.6
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 367,804 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 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
December 18, 2000
