I just recently upgraded a customer from 3.3 to 4.1(3). They have a lot of 7905/7912 phones.
In Call manager 3.3 you could change the settings for the MWI and ringing on the lines of the 7905/7912 phones.
In call manager 4.1(3) you cannot. i also checked 4.2 and 5.1(3) and neither one of them you can change the 05's and 12. You can change the 11's.
Why would cisco take out a feature like this. or is their a firmware or DEV patch that will fix this. I am running 4.1(3) SR 6 on the box.
Hoping to find a solution as the customer is not too happy with this feature not being available for 200+ of his phones :/