A.IMS-Charging-IdentifierB.List-Of-Calling-Party-AddressC.Service-Delivery-Start-Time-StampD.Service-Delivery-End-Time-Stamp
A.17user busyB.18no user respondingC.19no answer from the userD.20subscriber absent
A.Ua接口B.Ub接口C.Zh接口D.Sh接口