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Computer Supported Telecommunications Applications (CSTA)

Highlights

•     CSTA overview (PDF)
•    The Value of CSTA in the Marketplace (PDF)
  
•  CSTA / Web Services standard released (Press Release)
  
•  Frequently Asked Questions (FAQ)
  
•  Press Release on CSTA 6^th edition enhancements

 

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Meeting schedule
Meeting highlights
Documentation history
Scope and programme of work
CSTA overview
Frequently Asked Questions (FAQ)

 

Ecma frequently extends invitations to Industry experts. Please contact the secretary of this group.

 

Meeting schedule (click here)

 

Work in progress

• UML based Object Model for CSTA, with language/platform (e.g. Java/CLI) mapping rules;
• Encoding optimisations including X.694 transformations from ECMA-323 schemas;
• Aligning CSTA-WS (ECMA-348, ECMA-366 and TR/90) with WS-Addressing/Eventing/BaseNotification progress;
• Further CSTA-enhancements and Unified Communications support;
• Promotion of CSTA in SIP environments.

Meeting highlights

18 - 22 June 2007 in Berlin, Germany.

• Logical device features, including agent and voice resource modelling agreed for the Object Model Standard;
• Efficient static and dynamic encoding scheme for ECMA-323 instance document discussed;
• Multiple backward compatible enhancements to CSTA agreed;
• Discussed standardisation of uaCSTA (TR/87)

Documentation history

Phase III (latest)

These Standards and Technical Reports embody the work on CSTA Phase III:

ECMA-354 - Application Session Services.

ECMA-366 2^nd edition - WS-Session - Web Services for Application Session Services.

ECMA-348 2^nd edition - Web Services Description Language (WSDL) for CSTA Phase III.

ECMA-269 7^th edition - Services for Computer Supported Telecommunications Applications (CSTA) Phase III.

ECMA-285 2^nd edition specifies the application layer protocol (in ASN.1) for CSTA Phase III Services (ECMA-269 4^th edition) plus Protocol Implementation Conformance Statements (PICS). Note: ISO/IEC JTC 1 Sub Committee 6 developed standard based tools to convert XML schemata into ASN.1 and vice versa.

ECMA-323 3^rd edition - XML Protocol for Computer Supported Telecommunications Applications (CSTA) Phase III.

ECMA TR/90 - Session Management, Event Notification, and Computing Function Services - Amendments for ECMA-348.

ECMA TR/87 - Using CSTA for SIP Phone User Agents (uaCSTA).

ECMA TR/88 - Designing an Object Model for ECMA-269 (CSTA).

ECMA TR/82 Scenarios and flows for CSTA III.

ECMA TR/72 provides a glossary and definition of terms and abbreviations used by CSTA.

ECMA TR/80 provides an overview to the changes introduced by phase III to aid migration from earlier phases.

ECMA TR/85 Technical Report on XML CSTA support for voice browsers.

These versions of the above Ecma documents are fully aligned with the following ISO/IEC International Standards and Technical Report:

• ISO/IEC 18051:2004 - CSTA Services [ECMA-269 5^th edition].
• ISO/IEC 18052:2000 - CSTA Protocol [ECMA-285 2^nd edition].
• ISO/IEC TR 18053 - CSTA Glossary [ECMA TR/72].
• ISO/IEC 18056:2004 - CSTA XML [ECMA-323 2^nd edition].
• ISO/IEC 25437:2006 - WS-Session - Web Services for Applications [ECMA-366].

Phase II

The work on CSTA Phase III extends CSTA phase II:

ECMA-217 specifies the architecture and services for CSTA Phase II

ECMA-218 specifies the application layer protocol (in ASN.1) for CSTA Phase II plus Protocol Implementation Conformance Statements (PICS) - please note that there is an errata to early versions

Phase I

The work on CSTA Phase II extends CSTA phase I:

ECMA-179 specifies the architecture and services for CSTA Phase I

ECMA-180 specifies the application layer protocol (in ASN.1) for CSTA Phase I plus Protocol Implementation Conformance Statements (PICS)

TR/68 reflects typical scenarios for CSTA Phase II showing representative message flows

What is CSTA?

CSTA specifies an Applications Interface and Protocols for monitoring and controlling calls and devices in a communications network.

These calls and devices may support various media and can reside in various network environments such as IP, Switched Circuit Networks and mobile networks. CSTA however, abstracts various details of underlying signalling protocols (e.g. SIP/H.323) and networks for the applications. Click here to get an overview.

Ecma TC32 has scoped and defined the programme of work for Task Group 11 to develop and refine CSTA.

For more information about CSTA contact the Ecma helpdesk.

Updated 11 July 2007

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