For the new Installation of Call Manager version 4.1(3), is the default firmware load for Cisco IP Phone Models 7940,7960, and 7970 are good enough to use or should be upgraded.
You should look at installing the latest SR for CM 4.1(3), which is SR5d and that has the firmware which should be good for this install.
Getting Started
Find answers to your questions by entering keywords or phrases in the Search bar above. New here? Use these resources to familiarize yourself with the community: