This read-write Integer32 object, in milliseconds (10-10000, settable in 10ms increments), sets the initial timeout value used before the first retransmission of an unacknowledged XGCP message at the Call Agent-CAS/PBX interface. This is the starting point of a retransmission backoff sequence for XGCP signaling, distinct from the maximum cap set by vismCasXgcpMaxReXmitTime. An engineer optimizing signaling latency on a low-latency, reliable link would lower this initial timer so retransmission kicks in faster if a message is genuinely lost.