7911 on CUCM ver 11

[johnsnave1]

Hi,

I need to load an intermediate phone firware version for 7911 phones on CUCM ver 11. My problem is that the advice I have seen is to load cop file 8.5.2 before using the original device default again; however, this version is not recognised on CUCM 11. Could yo uplease advise as I have quite a few 7911 that will not load.

Many thanks, John.

[Mohammed Khan · Accepted solution]

Hi johnsnave1, 

You download the firmware which is in zip file format and upload extracted files to TFTP Server.

Follow procedure outlined in below link

https://supportforums.cisco.com/document/9873946/upgrade-downgrade-firmware-specific-ip-phone

Regards,

Mohammed Noor