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IANA Considerations for IAX: Inter-Asterisk eXchange Version 2
RFC 5457

Document type: RFC - Informational (February 2010; Errata)
Was draft-guy-iaxiana (individual)
Document stream: ISE
Last updated: 2013-03-02
Other versions: plain text, pdf, html

ISE State: (None)
Document shepherd: No shepherd assigned

IESG State: RFC 5457 (Informational)
Responsible AD: (None)
Send notices to: No addresses provided

Independent Submission                                       E. Guy, Ed.
Request for Comments: 5457                                      Truphone
Category: Informational                                    February 2010
ISSN: 2070-1721

     IANA Considerations for IAX: Inter-Asterisk eXchange Version 2

Abstract

   This document establishes the IANA registries for IAX, the Inter-
   Asterisk eXchange protocol, an application-layer control and media
   protocol for creating, modifying, and terminating multimedia sessions
   over Internet Protocol (IP) networks.  IAX was developed by the open
   source community for the Asterisk PBX and is targeted primarily at
   Voice over Internet Protocol (VoIP) call control, but it can be used
   with streaming video or any other type of multimedia.

Status of This Memo

   This document is not an Internet Standards Track specification; it is
   published for informational purposes.

   This is a contribution to the RFC Series, independently of any other
   RFC stream.  The RFC Editor has chosen to publish this document at
   its discretion and makes no statement about its value for
   implementation or deployment.  Documents approved for publication by
   the RFC Editor are not a candidate for any level of Internet
   Standard; see 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/rfc5457.

IESG Note

   The IESG thinks that this work is related to IETF work done in SIP,
   MMUSIC, and AVT WGs, but this does not prevent publishing.

Guy                           Informational                     [Page 1]
RFC 5457                 IANA IAX Considerations           February 2010

Copyright Notice

   Copyright (c) 2010 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.

Table of Contents

   1. Introduction ....................................................2
   2. IANA Considerations .............................................3
      2.1. Meta Command ...............................................3
      2.2. Frame Types ................................................3
      2.3. Control Frame Subclass .....................................4
      2.4. IAX Control Frames .........................................6
      2.5. HTML Command Subclasses ....................................8
      2.6. Information Elements .......................................8
      2.7. Authentication Methods ....................................11
      2.8. Dialplan Status Flags .....................................12
      2.9. Calling Presentation ......................................12
      2.10. Calling Type of Number (CALLINGTON) ......................13
      2.11. IAX Transit Network Identification .......................14
      2.12. IAX Type of Network ......................................15
      2.13. Cause Codes ..............................................16
      2.14. Encryption Methods .......................................18
      2.15. Media Formats ............................................19
   3. Security Considerations ........................................20
   4. Acknowledgments ................................................20
   5. Normative References ...........................................20

1.  Introduction

   IAX (Inter-Asterisk eXchange) is an "all-in-one" protocol for
   handling multimedia in IP networks.  It combines both control and
   media services in the same protocol.  In addition, IAX uses a single
   UDP data stream on a static port greatly simplifying Network Address
   Translation (NAT) gateway traversal, eliminating the need for other
   protocols to work around NAT, and simplifying network and firewall
   management.  IAX employs a compact encoding that decreases bandwidth
   usage and is well suited for Internet telephony service.  In
   addition, its open nature permits new payload type additions needed
   to support additional services.

Guy                           Informational                     [Page 2]
RFC 5457                 IANA IAX Considerations           February 2010

   This document specifies and provides the initial values for the
   creation of the IAX-related IANA registries as per [RFC5226].

2.  IANA Considerations

   The IAX protocol, as defined in [RFC5456], defines 15 namespaces that

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