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VoLTE Service Description and Implementation Guidelines ...
www.gsma.com5.2.3 Roaming VoLTE UE to VoLTE Call Establishment – Originating Side 92 5.2.4 Roaming VoLTE UE to VoLTE UE Call Establishment – Terminating Side 96 ... Voice over LTE, or VoLTE is a GSMA profile of the standards definition for the delivery of