This document describes a SIP/SDP profile for interconnection and roaming NNI between operators IMS networks for the purposes of exchanging traffic originating from and terminating to the respective operators’ customers. This document profiles SIP/SDP for the GSMA defined IMS based services ( (VoLTE, Video Call, SMSoIP, and RCS services) as described in the relevant GSMA PRDs cited in clause 2.
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