· InviteErrorResponsesToTriggerCSFB = "3XX,4XX,5XX,6XX"
· UseOutgoingSipUri = false
· RingingTimerSeconds = 90
· Preconditions = "supportedButMandatory"
· EarlyMediaNeedsHeader = true
· SupportPEarlyMediaHeader = true
· TriggerCSFBOnSDPError = true
· RingbackTimerSeconds = 90
· AlwaysSendSessionProgress = true