Session Initiation Protocol Service Examples
RFC 5359
Document | Type |
RFC - Best Current Practice
(October 2008; No errata)
Also known as BCP 144
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Authors | Steve Donovan , Chris Cunningham , Robert Sparks , Kevin Summers , Alan Johnston | ||
Last updated | 2015-10-14 | ||
Stream | IETF | ||
Formats | plain text html pdf htmlized bibtex | ||
Reviews | |||
Stream | WG state | (None) | |
Document shepherd | No shepherd assigned | ||
IESG | IESG state | RFC 5359 (Best Current Practice) | |
Consensus Boilerplate | Unknown | ||
Telechat date | |||
Responsible AD | Jon Peterson | ||
Send notices to | (None) |
Network Working Group A. Johnston, Ed. Request for Comments: 5359 Avaya BCP: 144 R. Sparks Category: Best Current Practice Tekelec C. Cunningham S. Donovan Cisco Systems K. Summers Sonus October 2008 Session Initiation Protocol Service Examples Status of This Memo This document specifies an Internet Best Current Practices for the Internet Community, and requests discussion and suggestions for improvements. Distribution of this memo is unlimited. Abstract This document gives examples of Session Initiation Protocol (SIP) services. This covers most features offered in so-called IP Centrex offerings from local exchange carriers and PBX (Private Branch Exchange) features. Most of the services shown in this document are implemented in the SIP user agents, although some require the assistance of a SIP proxy. Some require some extensions to SIP including the REFER, SUBSCRIBE, and NOTIFY methods and the Replaces and Join header fields. These features are not intended to be an exhaustive set, but rather show implementations of common features likely to be implemented on SIP IP telephones in a business environment. Johnston, et al. Best Current Practice [Page 1] RFC 5359 SIP Service Examples October 2008 Table of Contents 1. Overview ........................................................3 1.1. Legend for Message Flows ...................................4 2. Service Examples ................................................6 2.1. Call Hold ..................................................6 2.2. Consultation Hold .........................................19 2.3. Music on Hold .............................................38 2.4. Transfer - Unattended .....................................50 2.5. Transfer - Attended .......................................58 2.6. Transfer - Instant Messaging ..............................71 2.7. Call Forwarding Unconditional .............................77 2.8. Call Forwarding - Busy ....................................84 2.9. Call Forwarding - No Answer ...............................92 2.10. 3-Way Conference - Third Party Is Added .................101 2.11. 3-Way Conference - Third Party Joins ....................107 2.12. Find-Me .................................................113 2.13. Call Management (Incoming Call Screening) ...............125 2.14. Call Management (Outgoing Call Screening) ...............132 2.15. Call Park ...............................................135 2.16. Call Pickup .............................................147 2.17. Automatic Redial ........................................154 2.18. Click to Dial ...........................................163 3. Security Considerations .......................................166 4. Acknowledgements ..............................................166 5. References ....................................................167 5.1. Normative References .....................................167 5.2. Informative References ...................................168 Johnston, et al. Best Current Practice [Page 2] RFC 5359 SIP Service Examples October 2008 1. Overview This document provides example call flows detailing a SIP implementation of the following traditional telephony services: Call Hold 3-Way Conference Consultation Hold Find-Me Music on Hold Incoming Call Screening Unattended Transfer Outgoing Call Screening Attended Transfer Call Park Instant Messaging Transfer Call Pickup Unconditional Call Forwarding Automatic Redial Call Forwarding on Busy Click to Dial Call Forwarding on No Answer Note that the Single Line Extension call flow has been removed from this document and will be covered in a separate document. The call flows shown in this document were developed in the design of a SIP IP communications network. They represent an example set of so-called IP Centrex services or PBX services. It is the hope of the authors that this document will be useful forShow full document text