Hi
I install a Vg200 for ISDN connection. I configure to MGCP and connect to T1. I have met the problem. Some voice call has one way transmission. The ip phone user can not hear voice in 1 or 2 second during the call. However, the other side can hear the voice. I have upgraded the IOS to 15.5(T5), but the problem can not be solved. Do you have any opinion to do? Upgrade other IOS or change the configuration.
regards