Form: EFFECT

Notice of Effectiveness

December 14, 2010

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

Notice of Effectiveness

Effectiveness Date: December 14, 2010 1:00 P.M.
Form: S-4
CIK: 0001406666
Company Name: CALIX, INC
File Number: 333-170282