· supportPEarlyMediaHeader = true
· inviteErrorResponsesToTriggerCSFB = "3XX,4XX,5XX,6XX"
additionalContactParams {} 1
· preconditions = "supportedButMandatory"
· = 1 =IPv4 likely
· = false
· earlyMediaNeedsHeader = true
· triggerCSFBOnSDPError = true
· = 3600 s
· securityAgreementOptions = ""