3GPP TS 24.503 V8.22.0 (201612)
3rdGenerationPartnershipProject;TechnicalSpecificationGroupCoreNetworkandTerminals;TelecommunicationsandInternetconvergedServicesandProtocolsforAdvancedNetworking(TISPAN);IPMultimediaCallControlProtocolbasedonSessionInitiationProtocol(SIP)andSessionDescriptionProtocol(SDP)Stage3[3GPPTS
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