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Computer-supported telecommunications applications
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'''Computer-supported telecommunications applications (CSTA)''' is an [[abstraction]] layer for [[telecommunications]] applications. It is independent of underlying [[protocol (computing)|protocols]]. It has a telephone device model that enables [[Computer telephony integration|CTI]] applications to work with a wide range of telephone devices. Originally developed in 1992, it has continued to be developed and refined over the years. It is often the model that most CTI applications are built on and claim compliance with. It became an [[Open Systems Interconnection|OSI]] standard in July 2000. It is currently being maintained by [[ECMA International]]. The core of CSTA is a normalized Call Control model. Additional to the core there are Call Associated features and Physical Device features amongst others. An implementation of the standard need not provide all features, and so Profiles are provided. For example, the Basic Telephony profile provides such features as Make Call, Answer and Clear Connection. ==History== CSTA has seen 3 major revisions to date. * Phase 1 1992 * Phase 2 1994 * Phase 3 1998 ==Recent developments== Phase 3 of the CSTA standard saw the introduction of [[uaCSTA]], CSTA XML and CSTA Object Model extensions. These extensions are in various states of completion but all extend the scope of CSTA. ==Example of Underlying Protocols== Protocols that may be used by CSTA. * [[Session Initiation Protocol|SIP]] * [[H.323]] * [[Association Control Service Element|ACSE]]/[[Remote Operations Service Element protocol|ROSE]] ==See also== * [[Computer telephony integration|CTI]] * [[Java Telephony API]] * [[Telephony Application Programming Interface]] (TAPI) ==External links== *[http://www.ecma-international.org/activities/Communications/TG11/cstaIII.htm CSTA III Standard] *[http://www.ecma-international.org ECMA International] *[https://www.ringflow.com/ Remote Contact Center Services] *[https://web.archive.org/web/20110629182651/http://www.ecma-international.org/publications/files/ECMA-ST/Ecma-269.pdf Services for Computer Supported Telecommunications Applications (CSTA) Phase III] *[https://web.archive.org/web/20110629182754/http://www.ecma-international.org/publications/files/ECMA-ST/Ecma-323.pdf XML Protocol for Computer Supported Telecommunications Applications (CSTA) Phase III] *[https://web.archive.org/web/20110629182917/http://www.ecma-international.org/publications/files/ECMA-ST/Ecma-348.pdf Web Services Description Language (WSDL) for CSTA Phase III] *[http://www.businessapps.com.au/open-csta Open CSTA, an open source implementation of the CSTA protocol, phase III] [[Category:Computer telephony integration]]
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