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Standard ISO/IEC/TR 22767-ed.1.0 26.8.2005 preview

ISO/IEC/TR 22767-ed.1.0

Information technology - Telecommunications and information exchange between systems - Using CSTA for SIP phone user agents (uaCSTA)

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STANDARD published on 26.8.2005


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The information about the standard:

Designation standards: ISO/IEC/TR 22767-ed.1.0
Publication date standards: 26.8.2005
SKU: NS-940275
The number of pages: 82
Approximate weight : 277 g (0.61 lbs)
Country: International technical standard
Category: Technical standards ISO

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Network layer

Annotation of standard text ISO/IEC/TR 22767-ed.1.0 :

ISO/IEC TR 22767:2005 describes how CSTA can be used to provide a subset of CSTA call control functionality, called first party call control, for Session Initiation Protocol (SIP) user agents. The term uaCSTA (for user agent CSTA) refers to transporting ECMA-323 (CSTA XML) messages over a SIP session. SIP is a control (signalling) protocol for creating, modifying, and terminating sessions with one or more participants. These sessions include Internet telephone calls, multimedia distribution, and multimedia conferences. CSTA standardizes a very powerful and flexible set of application services to observe and control voice and non-voice media calls as well as control and observe non-call related features. uaCSTA leverages SIP mechanisms to provide a highly featured, robust, and extensible set of features to support 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, and
  • by a proxy server that is front-ending a PBX.

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