: This document provides details on new features, bug fixes (resolved caveats), and installation instructions. You can find them on the Cisco IP Phone 7900 Series Release Notes Firmware Download
Check Current Firmware: Use the phone’s "Settings" menu or the CUCM administration page to check the current firmware version. If the phone is running a very old version, you might need to perform an intermediate upgrade before moving to 9.4(2)SR4. cmterm7975sip942sr4zip 2021
portal. Note that a valid service contract is usually required to download these zip files. Verify MD5/SHA Checksums : This document provides details on new features,