I am having Call Manager 4.2(3). I was trying to add 7940G IP Phones , but I am not able to choose that in the Add Phone menu. There is no 7940G in that drop down menu. There are 7940, 7941, and 7941G.
Which option should I take or if I need to do any upgrades ? I want to use this as a dual line Phone. If I tried to add this Phone as 7940 Phone, the phone is getting registering. But I am able to see only 1 Line and able to assign DN to only this one Line.
If I am trying to add as a 7941 or 7960 Phones I am getting Load ID incorrect message on the IP Phone. Please help.