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CableLabs PacketCable CMSS Overview CMSS = IETF SIP + IETF SIP Extensions PacketCable CMSS CMSS is the Call Management Server Signaling Specification Part of PacketCable 1.5, version I01 available publicly at http://www.packetcable.com/specifications/specifications15.html http://www.packetcable.com/downloads/specs/PKT-SP-CMSS1.5-I01-050128.pdf CMSS designed to provide vendor requirements for intra-domain and inter-domain SIP signaling for VoIP applications CMSS was authored by many vendors involved in IETF based on original service requirements provided by cable MSOs CMSS comprises IETF Basic-SIP RFC 3261, plus the following IETF SIP Extensions: SIP Extension requirements to support quality-of-service Network Resource Reservation pre-conditions Reliability of Provisional Responses (PRACK) Extensions to support Regulatory & Billing Requirements (Electronic Surveillance, E911, malicious call trace) Asserted Identity in Trusted Networks (P-Asserted-Identity header) DCS proxy-proxy for event accounting, electronic surveillance, & operator services Uniform Resource Identifiers for telephone calls |