I have noticed the following behaviour in the said phones (7912 & 7906).
When making a phone call to those phones, I see that the softkey answer appears on the display but it is greyed out. The system is a CM 4.2(3)
I just want to know if this is normal or not.
My guess is that it is since that phone does only have speakers and not a microphone so, it doesn't make sense to press such a botton if you will have to lift the handset anyways. Maybe it is deactivated by default.
But, not sure, if anybody from Cisco could come back that would be great..
BTW, on the phone manual it is not explicit explained that. Thet talk about when you are already on a phone call, how to answer a new incoming one by pressing the answer softkey.