Interworking ISDN Call Control User Information with SIP
draft-ietf-cuss-sip-uui-isdn-02

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Last updated 2012-02-27
Replaces draft-drage-cuss-sip-uui-isdn
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Network Working Group                                      K. Drage, Ed.
Internet-Draft                                            Alcatel-Lucent
Intended status: Standards Track                             A. Johnston
Expires: August 29, 2012                                           Avaya
                                                       February 26, 2012

        Interworking ISDN Call Control User Information with SIP
                    draft-ietf-cuss-sip-uui-isdn-02

Abstract

   The motivation and use cases for interworking and transporting ITU-T
   DSS1 User-user information element data in SIP are described in the
   "Problem Statement and Requirements for Transporting User to User
   Call Control Information in SIP" document.  As networks move to SIP
   it is important that applications requiring this data can continue to
   function in SIP networks as well as the ability to interwork with
   this ISDN service for end-to- end transparency.  This document
   defines a usage of the User-to-User header field to enable
   interworking with this ISDN service.

   This document covers the interworking with both public ISDN and
   private ISDN capabilities, so the potential interworking with QSIG
   will also be addressed.

Status of this Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

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   This Internet-Draft will expire on August 29, 2012.

Copyright Notice

   Copyright (c) 2012 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

Drage & Johnston         Expires August 29, 2012                [Page 1]
Internet-Draft              SIP UUI for ISDN               February 2012

   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
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   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.

Table of Contents

   1.  Terminology  . . . . . . . . . . . . . . . . . . . . . . . . .  3
   2.  Overview . . . . . . . . . . . . . . . . . . . . . . . . . . .  3
   3.  Summary of the ISDN User-to-User Service . . . . . . . . . . .  3
     3.1.  The service  . . . . . . . . . . . . . . . . . . . . . . .  3
     3.2.  Impacts of the ISDN service on SIP operation . . . . . . .  5
   4.  Relation to SIP-T  . . . . . . . . . . . . . . . . . . . . . .  6
   5.  Transition away from ISDN  . . . . . . . . . . . . . . . . . .  6
   6.  ISDN Usage of the User-to-User Header Field  . . . . . . . . .  7
   7.  UAC requirements . . . . . . . . . . . . . . . . . . . . . . .  8
   8.  UAS requirements . . . . . . . . . . . . . . . . . . . . . . .  9
   9.  UUI contents . . . . . . . . . . . . . . . . . . . . . . . . . 10
   10. Considerations for ISDN interworking gateways  . . . . . . . . 11
   11. Coding requirements  . . . . . . . . . . . . . . . . . . . . . 11
   12. Media Feature Tag  . . . . . . . . . . . . . . . . . . . . . . 12
   13. IANA Considerations  . . . . . . . . . . . . . . . . . . . . . 12
   14. Security Considerations  . . . . . . . . . . . . . . . . . . . 13
   15. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . 14
   16. Changes since previous versions  . . . . . . . . . . . . . . . 14
   17. References . . . . . . . . . . . . . . . . . . . . . . . . . . 17
     17.1. Normative References . . . . . . . . . . . . . . . . . . . 17
     17.2. Informative References . . . . . . . . . . . . . . . . . . 17
   Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 18

Drage & Johnston         Expires August 29, 2012                [Page 2]
Internet-Draft              SIP UUI for ISDN               February 2012

1.  Terminology

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
   document are to be interpreted as described in BCP 14, RFC 2119
   [RFC2119].

2.  Overview

   This document describes a usage of the User-to-User header field
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