I ask me to explain the following:I have CUCM 12.5 Pub and Sub. There is CUCM 9.1 Pub only (for tests). Made SIP Trunk from 9.1 to 12.5 (only on Sub !!!) and from 12.5 to 9.1 (All Nodes is checked). Calls from 9.1 to 12.5 pass, from 12.5 to 9.1 no (5...