McDewey

Comments Supported in Unified Communications Manager SIP Message Unified CM SIP sends out 423 if an expired header is received with an expires time lower than the acceptable minimum. Yes 423 Upon receiving this message, the system sends a new request if an additional address is present. Otherwise, the system initiates a graceful disconnect. Yes 5xx Response This message does not get generated. Upon receiving this message, the system initiates a graceful disconnect. Yes 6xx Response Table 4: Standard SIP Header Fields Comments Supported in Unified Communications Manager SIP Headers — Yes Accept — No Accept-Encoding — No Accept-Language Unified CM sends Alert-Info to indicate internal versus external call. Yes Alert-Info — Yes Allow — No Authentication-Info — Yes Authorization — Yes Call-ID — Yes Call-Info — Yes Contact Unified CM ignores this header if it gets received. Unified CM does not generate this header. No Content-Disposition — No Content-Encoding SIP Line Messaging Guide (Standard Edition) for Cisco Unified Communications Manager 8 SIP Standard Line Interface Standard Interface Compliance Summary