Best Current Practice for Communications Services in Support of Emergency Calling
RFC 6881
Document | Type |
RFC - Best Current Practice
(March 2013; No errata)
Also known as BCP 181
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Authors | Brian Rosen , James Polk | ||
Last updated | 2015-10-14 | ||
Stream | Internet Engineering Task Force (IETF) | ||
Formats | plain text html pdf htmlized (tools) htmlized bibtex | ||
Reviews | |||
Stream | WG state | WG Document | |
Document shepherd | No shepherd assigned | ||
IESG | IESG state | RFC 6881 (Best Current Practice) | |
Action Holders |
(None)
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Consensus Boilerplate | Unknown | ||
Telechat date | |||
Responsible AD | Robert Sparks | ||
IESG note | Marc Linsner (mlinsner@cisco.com) is the document shepherd. | ||
Send notices to | (None) |
Internet Engineering Task Force (IETF) B. Rosen Request for Comments: 6881 NeuStar BCP: 181 J. Polk Category: Best Current Practice Cisco Systems ISSN: 2070-1721 March 2013 Best Current Practice for Communications Services in Support of Emergency Calling Abstract The IETF and other standards organizations have efforts targeted at standardizing various aspects of placing emergency calls on IP networks. This memo describes best current practice on how devices, networks, and services using IETF protocols should use such standards to make emergency calls. Status of This Memo This memo documents an Internet Best Current Practice. This document is a product of the Internet Engineering Task Force (IETF). It represents the consensus of the IETF community. It has received public review and has been approved for publication by the Internet Engineering Steering Group (IESG). Further information on BCPs is available in Section 2 of RFC 5741. Information about the current status of this document, any errata, and how to provide feedback on it may be obtained at http://www.rfc-editor.org/info/rfc6881. Copyright Notice Copyright (c) 2013 IETF Trust and the persons identified as the document authors. All rights reserved. This document is subject to BCP 78 and the IETF Trust's Legal Provisions Relating to IETF Documents (http://trustee.ietf.org/license-info) in effect on the date of publication of this document. Please review these documents carefully, as they describe your rights and restrictions with respect to this document. Code Components extracted from this document must include Simplified BSD License text as described in Section 4.e of the Trust Legal Provisions and are provided without warranty as described in the Simplified BSD License. Rosen & Polk Best Current Practice [Page 1] RFC 6881 Emergency Call Phone BCP March 2013 Table of Contents 1. Introduction ....................................................3 2. Terminology .....................................................3 3. Overview of How Emergency Calls Are Placed ......................3 4. Which Devices and Services Should Support Emergency Calls? ......4 5. Identifying an Emergency Call ...................................4 6. Location and Its Role in an Emergency Call ......................5 6.1. Types of Location Information ..............................6 6.2. Location Determination .....................................6 6.2.1. User-Entered Location Information ...................6 6.2.2. Access Network "Wire Database" Location Information .........................................6 6.2.3. End System Measured Location Information ............7 6.2.4. Network Measured Location Information ...............7 6.3. Who Adds Location? The Endpoint, or the Proxy? ............8 6.4. Location and References to Location ........................8 6.5. End System Location Configuration ..........................8 6.6. When Location Should Be Configured ........................10 6.7. Conveying Location ........................................11 6.8. Location Updates ..........................................11 6.9. Multiple Locations ........................................12 6.10. Location Validation ......................................12 6.11. Default Location .........................................13 6.12. Other Location Considerations ............................13 7. LIS and LoST Discovery .........................................13 8. Routing the Call to the PSAP ...................................14 9. Signaling of Emergency Calls ...................................15 9.1. Use of TLS ................................................15 9.2. SIP Signaling Requirements for User Agents ................16 9.3. SIP Signaling Requirements for Proxy Servers ..............17 10. Callbacks .....................................................18 11. Mid-Call Behavior .............................................19 12. Call Termination ..............................................19 13. Disabling of Features .........................................19 14. Media .........................................................20 15. Testing .......................................................21 16. Security Considerations .......................................22 17. IANA Considerations ...........................................22 17.1. Test Service URN .........................................22Show full document text