We have upgraded CUCM from version 4.1 to version 6.1. The upgrade was done successfully.
After the upgrade , of the CUCMwe wanted to make an upgrade of the ATAs firmware.
We have uploaded the firmware (3.2(4)) successfully on the CallManager cluster. The issue is that the ATAs did not upgrade their firmware!
we have restarted the tftp server on the callmanager server, we even restarted the whole cluster but still the issue persists!
It's the first time that i see such issue.
Can you please give me an idea about this issue and how could be resolved?
Thanks in advance.