標準號：ISO/IEC TR 22767-2005
中文標準名稱：信息技術.系統間遠程通信和信息交換.SIP電話用戶代理(uaCSTA)用CSTA的使用
英文標準名稱：Information technology - Telecommunications and information exchange between systems - Using CSTA for SIP phone user agents (uaCSTA)
標準類型：M11
發布日期：1999/12/31 12:00:00
實施日期：1999/12/31 12:00:00
中國標準分類號：M11
國際標準分類號：33.040.30;35.100.30
適用范圍：The Session Initiation Protocol (SIP) is a control (signalling) protocol for creating, modifying, and terminatingsessions with one or more participants. These sessions include Internet telephone calls, multimediadistribution, and multimedia conferences.CSTA standardizes a very powerful and flexible set of application services to observe and control voice andnon-voice media calls as well as control and observe non-call related features.This Technical Report describes how CSTA can be used to provide a subset of CSTA call control functionality,called 1st party call control, for SIP user agents. The term uaCSTA (for user agent CSTA) refers totransporting ECMA-323 (CSTA XML) messages over a SIP session.uaCSTA leverages SIP mechanisms to provide a highly featured, robust, and extensible set of features tosupport applications in the Enterprise environment.uaCSTA can be implemented by several different types of SIP user agents:? directly by a SIP user agent on a SIP phone? uaCSTA can also be implemented by a SIP B2BUA to augment 3PCC functionality? by a proxy server that is front-ending a PBX.