I have two location A and B. I am connecting the both location users voice calls thru an E1 line. We have avaya 8600 PBX. All the calls from B will land in avaya PBX which in turn is connected to E1 of router A. Recently only channel 21-30 is used for calls and remaining are not used. When there is a 11th call from location B to location A we get busy tone where only 10 simultaneous calls are running.
I am attaching show tech support of both location.
thanks and regards