/mcp• Table 1: Applicable Standards and Drafts—Standard Interface, on page 5 identifies the applicable standards and drafts. • Table 2: Compliance with SIP Requests, on page 5 and Table 3: Compliance with SIP Responses, on page 6 provide SIP line-side compliance for SIP messages. • Table 4: Standard SIP Header Fields, on page 8 provides SIP line-side compliance for standard SIP headers. Table 1: Applicable Standards and Drafts—Standard Interface Notes ID SIP RFC 3261 PRACK RFC 3262 SDP offer/answer RFC 3264 UPDATE RFC 3311 REFER RFC 3515 MWI Package RFC 3842 Replaces Header RFC 3891 Referred-by Mechanism RFC 3892 ANAT Usage in SDP and SIP RFC 4091 and 4092 Reason Header for Preemption Events RFC 4411 Resource Priority RFC 4412 Opus Codec RFC 6716 Remote-Party-Id Header draft-ietf-sip-privacy-04.txt Session-ID Header draft-ietf-insipid-session-id-07 Diversion Header draft-levy-sip-diversion-08.txt Table 2: Compliance with SIP Requests Comments Supported in Unified Communications Manager SIP Message The system also supports re-INVITE for outbound calls. Yes INVITE — Yes ACK SIP Line Messaging Guide (Standard Edition) for Cisco Unified Communications Manager 5 SIP Standard Line Interface Standard Interface Compliance Summary