upgrading firmware versions on CUCM

[jjoseph01]

Hi all. I was wondering when you upgrade the firmware on the phones, do you have to do it to both the Pub and Sub, separately?

[kelvin.blair · Accepted solution]

Yes. Each server has its own TFTP directory. So with that said you need to apply the device packs to both servers.

[jjoseph01]

Thanks!