ISO IEC TR 22767-2005 Information technology - Telecommunications and information exchange between systems - Using CSTA for SIP phone user agents (uaCSTA)《信息技术 .pdf

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1、 Reference number ISO/IEC TR 22767:2005(E) ISO/IEC 2005TECHNICAL REPORT ISO/IEC TR 22767 First edition 2005-08-15Information technology Telecommunications and information exchange between systems Using CSTA for SIP phone user agents (uaCSTA) Technologies de linformation Tlcommunications et change di

2、nformation entre systmes Utilisation de CSTA pour agents dutilisateurs de tlphone de SIP (uaCSTA) ISO/IEC TR 22767:2005(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobes licensing policy, this file may be printed or viewed but shall not be edited unless the ty

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5、kely event that a problem relating to it is found, please inform the Central Secretariat at the address given below. ISO/IEC 2005 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, includin

6、g photocopying and microfilm, without permission in writing from either ISO at the address below or ISOs member body in the country of the requester. ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published

7、in Switzerland ii ISO/IEC 2005 All rights reservedISO/IEC TR 22767:2005(E) ISO/IEC 2005 All rights reserved iii Contents Page Foreword. vii Introduction . viii 1 Scope 1 2 Purpose.1 3 Normative references 2 4 Terminology .2 4.1 General terms.2 4.2 SIP/CSTA Terminology Mappings3 5 Example Environment

8、s for uaCSTA 3 5.1 Controlling and Observing a SIP Phone .3 5.2 Controlling and Observing a SIP Phone by Augmenting B2BUA Functionality .4 5.3 Controlling a PBX Phone 4 6 Example User Agent Configurations .5 6.1 Single Line Phone UA .5 6.2 Multi Line Phone UA6 6.3 Bridged Appearance Phone and other

9、Advanced UA Configurations.6 7 SIP Transport Mechanism for CSTA Messages7 7.1 Establishing a CSTA Application Session 7 7.2 Transporting CSTA Service Requests and Responses.8 7.3 Starting a Monitor and Transporting CSTA Events9 8 uaCSTA Profiles.9 8.1 Minimal uaCSTA Call Control Profile.10 8.1.1 Ser

10、vices 10 8.1.2 Events .10 8.2 Basic uaCSTA Call Control Profile.10 8.2.1 Services 10 8.2.2 Events .11 8.3 Advanced uaCSTA Call Control Profile.11 8.3.1 Services 11 8.3.2 Events .12 8.4 Conferencing uaCSTA Call Control Feature Profile.12 8.4.1 Services 12 8.4.2 Events .13 8.5 Basic uaCSTA Device Feat

11、ure Profile .13 8.5.1 Services 13 8.5.2 Events .13 8.6 Speaker uaCSTA Device Feature Profile.13 8.6.1 Services 13 8.6.2 Events .13 9 CSTA Calls and Connections .13 9.1 CSTA Connection State Model.14 9.2 Connection State Transitions for CSTA Calls 14 9.2.1 Incoming Call .14 9.2.2 Outgoing Call .15 10

12、 Call Control.15 10.1 Alternate Call15 10.1.1 Service Request.16 ISO/IEC TR 22767:2005(E) iv ISO/IEC 2005 All rights reserved10.1.2 Positive Service Response 16 10.1.3 Negative Service Response . 16 10.2 Answer Call 17 10.2.1 Service Request 17 10.2.2 Positive Service Response 18 10.2.3 Negative Ser

13、vice Response . 18 10.3 Clear Connection 19 10.3.1 Service Request 19 10.3.2 Positive Service Response 19 10.3.3 Negative Service Response . 19 10.4 Consultation Call. 20 10.4.1 Service Request 20 10.4.2 Positive Service Response 21 10.4.3 Negative Service Response . 21 10.5 Deflect Call. 22 10.5.1

14、Service Request 22 10.5.2 Positive Service Response 22 10.5.3 Negative Service Response . 23 10.6 Generate Digits 23 10.6.1 Service Request 24 10.6.2 Positive Service Response 24 10.6.3 Negative Service Response . 24 10.7 Hold Call. 25 10.7.1 Service Request 25 10.7.2 Positive Service Response 25 10

15、.7.3 Negative Service Response . 26 10.8 Make Call 26 10.8.1 Service Request 26 10.8.2 Positive Service Response 27 10.8.3 Negative Service Response . 27 10.9 Reconnect Call 28 10.9.1 Service Request 28 10.9.2 Positive Service Response 29 10.9.3 Negative Service Response . 29 10.10 Retrieve Call. 30

16、 10.10.1 Service Request 30 10.10.2 Positive Service Response 30 10.10.3 Negative Service Response . 30 10.11 Single Step Transfer Call 31 10.11.1 Service Request 31 10.11.2 Positive Service Response 32 10.11.3 Negative Service Response . 32 10.12 Transfer Call 33 10.12.1 Service Request 33 10.12.2

17、Positive Service Response 34 10.12.3 Negative Service Response . 34 11 Physical Phone Features 35 11.1 Get Message Waiting Indicator 35 11.1.1 Service Request 36 11.1.2 Service Response . 36 11.2 Set Message Waiting Indicator 36 11.2.1 Service Request 36 11.2.2 Service Response . 37 11.3 Get Speaker

18、 Mute 37 11.3.1 Service Request 37 11.3.2 Service Response . 37 11.4 Set Speaker Mute 38 11.4.1 Service Request 38 11.4.2 Service Response . 38 ISO/IEC TR 22767:2005(E) ISO/IEC 2005 All rights reserved v 11.5 Get Speaker Volume39 11.5.1 Service Request.39 11.5.2 Service Response39 11.6 Set Speaker V

19、olume 40 11.6.1 Service Request.40 11.6.2 Service Response40 12 Logical Phone Features 41 12.1 Get Do Not Disturb.41 12.1.1 Service Request.41 12.1.2 Service Response41 12.2 Set Do Not Disturb.41 12.2.1 Service Request.42 12.2.2 Service Response42 12.3 Get Forwarding 42 12.3.1 Service Request.42 12.

20、3.2 Service Response42 12.4 Set Forwarding.43 12.4.1 Service Request.43 12.4.2 Service Response44 13 Monitoring Services and Events 44 13.1 Monitor Start.44 13.1.1 Service Request.44 13.1.2 Positive Service Response .45 13.1.3 Negative Service Response45 13.2 Monitor Stop.46 13.2.1 Service Request.4

21、6 13.2.2 Positive Service Response .47 13.2.3 Negative Service Response47 13.3 Events .47 14 Snapshot Services.48 14.1 Snapshot Device48 14.1.1 Service Request.48 14.1.2 Positive Service Response .48 14.1.3 Negative Service Response51 15 Discovery and System Status Services 51 15.1 Get CSTA Features

22、 51 15.1.1 Service Request.52 15.1.2 Service Response52 15.1.3 Negative Service Response53 15.2 Request System Status.53 15.2.1 Service Request.53 15.2.2 Service Response53 15.2.3 Negative Service Response54 15.3 System Status 54 15.3.1 Service Request.54 15.3.2 Positive Service Response .55 15.3.3

23、Negative Service Response55 16 ECMA-323 Illustrative Examples 55 16.1 Controlling a SIP UA55 16.1.1 Creating an Application Session, Establishing a Monitor for a SIP Phone.56 16.1.2 Creating a Call from a SIP UA, Clearing a Call at a SIP UA .58 16.1.3 Answering and Clearing an Incoming Call at a UA

24、63 16.1.4 Answering an Incoming Call at a UA (no CSTA monitor or CSTA events)65 16.1.5 Examples of Exception Conditions at a SIP UA .67 16.2 Controlling a PBX Phone 68 16.2.1 Creating an Application Session, Establishing a Monitor for a PBX Phone .69 16.2.2 Creating a Call from a PBX Phone, Clearing

25、 a Call at a PBX Phone 71 ISO/IEC TR 22767:2005(E) vi ISO/IEC 2005 All rights reserved16.2.3 Answering and Clearing an Incoming Call at a PBX Phone . 75 16.2.4 Examples of Exception Conditions at a PBX Phone . 78 Annex A (informative) Example use of SIP and TEL URIs 80 ISO/IEC TR 22767:2005(E) ISO/I

26、EC 2005 All rights reserved vii Foreword ISO (the International Organization for Standardization) and IEC (the International Electrotechnical Commission) form the specialized system for worldwide standardization. National bodies that are members of ISO or IEC participate in the development of Intern

27、ational Standards through technical committees established by the respective organization to deal with particular fields of technical activity. ISO and IEC technical committees collaborate in fields of mutual interest. Other international organizations, governmental and non-governmental, in liaison

28、with ISO and IEC, also take part in the work. In the field of information technology, ISO and IEC have established a joint technical committee, ISO/IEC JTC 1. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of the joint technica

29、l committee is to prepare International Standards. Draft International Standards adopted by the joint technical committee are circulated to national bodies for voting. Publication as an International Standard requires approval by at least 75 % of the national bodies casting a vote. In exceptional ci

30、rcumstances, the joint technical committee may propose the publication of a Technical Report of one of the following types: type 1, when the required support cannot be obtained for the publication of an International Standard, despite repeated efforts; type 2, when the subject is still under technic

31、al development or where for any other reason there is the future but not immediate possibility of an agreement on an International Standard; type 3, when the joint technical committee has collected data of a different kind from that which is normally published as an International Standard (“state of

32、 the art”, for example). Technical Reports of types 1 and 2 are subject to review within three years of publication, to decide whether they can be transformed into International Standards. Technical Reports of type 3 do not necessarily have to be reviewed until the data they provide are considered t

33、o be no longer valid or useful. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO and IEC shall not be held responsible for identifying any or all such patent rights. ISO/IEC TR 22767, which is a Technical Report of type 3, was

34、prepared by Ecma International (as ECMA TR/87) and was adopted, under a special “fast-track procedure”, by Joint Technical Committee ISO/IEC JTC 1, Information technology, Subcommitte SC 6, Telecommunications and information exchange between systems, in parallel with its approval by national bodies

35、of ISO and IEC. ISO/IEC TR 22767:2005(E) viii ISO/IEC 2005 All rights reservedIntroduction This Technical Report illustrates how CSTA can be used over a SIP session to control and observe SIP user agents (uaCSTA). This Technical Report is part of a suite of Ecma CSTA Phase III Standards and Technica

36、l Reports. All of the Standards and Technical Reports in this suite are based upon the practical experience of Ecma member companies and each one represents a pragmatic and widely based consensus. TECHNICAL REPORT ISO/IEC TR 22767:2005(E) ISO/IEC 2005 All rights reserved 1 Information technology Tel

37、ecommunications and information exchange between systems Using CSTA for SIP phone user agents (uaCSTA) 1 Scope The Session Initiation Protocol (SIP) is a control (signalling) protocol for creating, modifying, and terminating sessions with one or more participants. These sessions include Internet tel

38、ephone 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. This Technical Report describes how CSTA can

39、be used to provide a subset of CSTA call control functionality, called 1 stparty call control, for SIP user agents. The term uaCSTA (for user agent CSTA) refers to transporting ECMA-323 (CSTA XML) messages over a SIP session. uaCSTA leverages SIP mechanisms to provide a highly featured, robust, and

40、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 by a proxy server that is

41、 front-ending a PBX. 2 Purpose Describe the relevant portions of the CSTA Standards The two primary CSTA Standards, Services for Computer Supported Telecommunications Applications (ECMA-269) and the XML Protocol for CSTA (ECMA-323), are relatively large standards (combined over 1100 pages). Due to t

42、heir size it is sometimes difficult for SIP developers without prior knowledge of CSTA standards to quickly find the relevant parts of the CSTA standards needed to implement basic features. This TR shows the relevant CSTA concepts and how they can be used to implement a CSTA-based application protoc

43、ol without having to read all of the CSTA Standards. Terminology Although many of the concepts are similar, different terms are used in SIP and CSTA to describe the same concepts. Since CSTA is designed to be protocol independent, it is helpful to show how the abstract terminology of CSTA is mapped

44、to SIP specific terminology. Extensibility - A SIP phone that is being developed to support a specific application may initially need to only support a small subset of the features standardized in CSTA. As the types and complexity of applications using these devices increase, it is expected that the

45、se devices will need to support additional, more advanced, features standardized by CSTA, similar to features supported by other types of phones in Enterprise environments. This TR shows how basic features can be extended to support a rich standards- based feature set for applications. ISO/IEC TR 22

46、767:2005(E) 2 ISO/IEC 2005 All rights reserved Interoperability - In order to encourage interoperability of applications and phones supporting this application protocol, additional CSTA Profiles, which include minimal sets of CSTA functionality, are described. These profiles can be extended by imple

47、mentations to provide a more complete set of call and devices features commonly used by Enterprise applications. 3 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated referen

48、ces, the latest edition of the referenced document (including any amendments) applies. This TR provides informative examples of how to use CSTA concepts as an application protocol for SIP user agents. The following Ecma Standards should be used as the definitive references for CSTA. ECMA-269, Servic

49、es for Computer Supported Telecommunications Applications (CSTA) Phase III, 6 thedition, June 2004 (International Standard ISO/IEC 18051) ECMA-323, XML Protocol for Computer Supported Telecommunications Applications (CSTA) Phase III, 3 rdedition, June 2004 (International Standard ISO/IEC 18056) The following IETF references provide information on the SIP features referenced in this TR: RFC 3261, SIP: Session Initiation Protocol, Rosenberg, J. et al, IETF, June 2002 4 Terminology 4.1 General terms The fol