Hi,
You can find out how many IP channels are occupied by finding out what PBX numbers have the 2 PBX's.
You need to do an STATE XNET ALL so find the PBX numbers, after that you need to type
STATE XNET ICP <icp pbx number>
It's something like that
Signalling | Link | Dest | XNET | State | Owner | ID |Status
Dvc Location | Handle |Switch| Trunk Id | | | |
-------------------------------------------------------------------------------
1 1 11 1 | 12 | 141 | 269 |Busy |Call Proc|7 191|Wait
1 1 11 1 | 12 | 141 | 177 |Busy |Call Proc|6 1B7|Wait
1 1 11 1 | 12 | 141 | 590 |Busy |Call Proc|4 21D|Wait
1 1 11 1 | 12 | 141 | 349 |Busy |Call Proc|2 23C|Wait
-------------------------------------------------------------------------------
The destination switch is the PBX number (141) . The trunk ID as you can see is a random number
because they are virtual channels. Unfortunately you can't see what extensions are involved in call.