Limit on the call duration in seconds for all outbound calls that are bridged from the same or another trunk. A blank or 0 value implies the call duration is not limited:
Voice Services -> SP1 Service -> X_BridgedOutboundCallMaxDuration
Voice Services -> SP2 Service -> X_BridgedOutboundCallMaxDuration
Physical Interfaces -> LINE Port -> BridgedOutboundCallMaxDuration