Perform a factory reset or a standard restart. The phone should detect the new load and begin the upgrade process. ⚠️ Pro-Tips for 2021+ Setups
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
Maintaining firmware from the 2021 cycle is essential for three primary reasons: security, stability, and certificate management. Perform a factory reset or a standard restart
(also compatible with 7945G/7965G variants in some packages). SIP (Session Initiation Protocol). Firmware Version: 9.4(2) SR4 (Service Release 4). cmterm7975sip942sr4zip 2021