Why does my IP phone fail to auto-register with Cisco CallManager?
A. Cisco CallManager disables auto-registration by default in order to prevent unauthorized connections to your network. If you must turn on auto-registration, complete the steps that the Auto-Registration guide outlines. If your IP phones still fail to auto-register after you complete the instructions in the Auto-Registration guide, reset the IP phone back to factory defaults: • Press **# in order to unlock Network Configuration on the phone. • Press Settings. • Press 3 on the keypad (or scroll down) for Network Configuration. • Press 33 on the keypad (or scroll down) for Erase Configuration. • Press the Yes softkey. • Press the Save softkey.
