[1]
RFC 3261 - SIP: Session Initiation Protocol
(
2014-08-15 14:48:03 +09:00
版)
http://tools.ietf.org/html/rfc3261#section-20.11
[2]
RFC 3261 - SIP: Session Initiation Protocol
(
2014-08-15 14:48:03 +09:00
版)
http://tools.ietf.org/html/rfc3261#section-27.6