WhatisCSTA.pptVIP

What is CSTA? CSTA Overview CSTA History CSTA Standards Suite CSTA Features ECMA-323 (CSTA XML) Call Control Details Voice Browsers ECMA-323 Current CSTA Standardization Activities What is CSTA? Abstraction Layer for telecommunication applications: Independent of underlying signaling protocols H.323, SIP, Analog, T1, ISDN, etc. Independent of devices intelligent endpoints, low-function/stimulus devices, SIP Signaling models - 3PCC vs. Peer/Peer Operates equally well in different environments: 3rd party call control 1st party call control Basic call model standardized in 1992 – continually refined and enhanced based upon significant industry implementation experiences, new protocols, etc. Design goal to enhance application portability across CSTA implementations: Specifies normalized call model and behavior Complete functional definition of each service Specific conformance criteria CSTA Evolution Phase I published June ‘92 40 features, 66 pages (Services Specification) focus on call control Phase II published Dec. ‘94 77 features, 145 pages (Services Specification) I/O Voice Unit Services, more call control services Phase III - CSTA Phase II Features versit CTI Technology Published Dec. ‘98 136 features, 650 pages (Services Specification) Published as an ISO Standard July 2000 Published CSTA XML (ECMA-323) June 2004 Published “Using CSTA with Voice Browsers” (TR/85) December 2002 Published CSTA WSDL (ECMA-348) June 2004 Published Object Model TR/88 June 2004 Published “Using CSTA for SIP Phone User Agents (uaCSTA)” TR/87 June 2004 CSTA Standards Documents Standardized CSTA Features 26 Call Control features (making call, answering call, etc.) 6 Call Associated features (sending user data, etc.) 19 Logical Device features (do not disturb, forwarding, etc.) 23 Physical Device features (writing to device display, etc.) 5 Capability Exchange features (feature discovery, etc.) 4 Snapshot features (query existing calls at a device, etc.) 3 Monitor features (subscr