we have two callmanagers 4.1(3), publisher and subscriber. we tried to register IP Phone A to publisher and IP Phone B to subscriber. after successfully register, IP Phone A can not call IP Phone B or vice versa. Does anyone know this behaviour?
FYI, we also have another cluster CCM 5.1.1. Trying to do same thing as CCM 4.1(3). IP Phones can call each others normally.