I have ugraded my call manager from 8.6.2 to 10.5.2. After the upgradation few of the 6941 phone (15 out of 30) stopped working, It is getting registered to the upgraded call manager but not able to access the telephone (we wont be able to do anything on the phone, if any calls made to that phone, we will get ring back tone, but no any notification - ring or display on the phone - .totally stuck,cant even get into settings of the phone).
working 6941 phones are running SCCP9.4.1.3.SR2
Tried the factory reset procedure as per below document but the phone is not factory resetting instead it just boots up:
Cisco Unified IP Phone 6921, 6941, 6945, and 6961 Administration Guide for Cisco Unified Communications Manager 10.0 (SC…
Step 1 While powering up the phone, press and hold #.
Step 2 When the light on the Mute button and handset light strip turns off and all other lights (Line button, Headset button, Speakerphone button and Select button) stay green, press 123456789*0# in sequence. When you press 1, the lights on the line buttons turn red. The light on the Select button flashes when a button is pressed. If you press the buttons out of sequence, the lights on the line button, headset button, speakerphone button, and Select button turn green. You need to start over and press 123456789*0# in sequence again. After you press these buttons, the phone goes through the factory reset process.
Appreciate if anyone can help on this.
