Several IP phones in my place has a strange problem. Normally, when there is an incoming call, what we have to do is just pick up the handle and talk, but sometimes users have to press the "Answer" softkey to answer the call. And after a reset, the problem disappears. Any good explanation on this ?
I'm using CCM 4.1(3)SR4D, and firmware SCCP11.7-2-3S for 7911 IP Phone and TERM41.7-0-3-0S for 7961 IP Phone.
For the 7961, the bug you are facing is CSCsc99161 - 7970 will not go offhook except via softkey.
Release notes of 7961:
The caveat is shown in this link:
wow... upgrading 1500 phones, that's going to take some time... :(
I can't find any caveat for 7911 phones.