Is it getting the IP address? Is it able to contact the CallManager? Was there any recent CCM upgrade, if so, the firmware for that phone should be available on the new CCM after upgradation. If firmware is already available and inspite of it , it is cycling in the Registering states, then it could be due to the CCM configuration. Try stopping and starting the TFTP and CCM on the Servicabbility and Control Center. This should help it to work.
Cisco IP Phone Model 7960G, 7940G, and 7910 Administration Guide for Cisco CallManager Release 3.3 and later
SIP traces provide key information in troubleshooting SIP Trunks, SIP
endpoints and other SIP related issues. Even though these traces are in
clear text, these texts can be gibberish unless you understand fully
what they mean. This document attempts to br...
Please find the attached HTML document, download and open it on your PC.
This provides an easy to use form where you simply answer a few
questions and it will render the proper jabber-config.xml file for you
to copy/paste. There is built in logic to verif...
CUCM Database Replication is an area in which Cisco customers and
partners have asked for more in-depth training in being able to properly
assess a replication problem and potentially resolve an issue without
involving TAC. This document discusses the bas...