P-Charge-Info - A Private Header (P-Header) Extension to the Session Initiation Protocol (SIP)
draft-york-dispatch-p-charge-info-02

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DISPATCH                                                         D. York
Internet-Draft                                           DisTel Research
Intended status: Informational                                T. Asveren
Expires: March 24, 2014                                            Sonus
                                                      September 20, 2013

  P-Charge-Info - A Private Header (P-Header) Extension to the Session
                       Initiation Protocol (SIP)
                  draft-york-dispatch-p-charge-info-02

Abstract

   This text documents 'P-Charge-Info', an existing private Session
   Initiation Protocol (SIP) header (P-header) used to convey billing
   information about the party to be charged.  This P-Header is
   currently in production usage by a number of equipment vendors and
   carriers and this document is submitted to request the registration
   of this header with IANA.  This P-Header may also be used in some
   situations to carry the ISUP Charge Number parameter for PSTN
   interconnection.

   NOTE: This document has been in development since 2008 under the name
   draft-york-sipping-p-charge-info.  This -02 document is identical to
   draft-york-sipping-p-charge-info-15 except for edits to the text to
   indicate this is now for the DISPATCH working group as the SIPPING
   working group no longer exists.

Status of this Memo

   This Internet-Draft is submitted in full conformance with the
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   This Internet-Draft will expire on March 24, 2014.

Copyright Notice

   Copyright (c) 2013 IETF Trust and the persons identified as the

York & Asveren           Expires March 24, 2014                 [Page 1]
Internet-Draft     P-Charge-Info, a SIP Private Header    September 2013

   document authors.  All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal
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Table of Contents

   1.  Overview . . . . . . . . . . . . . . . . . . . . . . . . . . .  4
   2.  Requirements Language  . . . . . . . . . . . . . . . . . . . .  5
   3.  Purpose of this Document . . . . . . . . . . . . . . . . . . .  5
   4.  Examples of the Problem  . . . . . . . . . . . . . . . . . . .  5
     4.1.  Use Case - Billing Identifier  . . . . . . . . . . . . . .  5
     4.2.  Use Case - ISUP Charge Number  . . . . . . . . . . . . . .  5
     4.3.  Use Case - Distributed Enterprise  . . . . . . . . . . . .  6
     4.4.  Use Case - Hosted Telephony Provider . . . . . . . . . . .  6
   5.  Alternatives . . . . . . . . . . . . . . . . . . . . . . . . .  7
     5.1.  P-Charging-Vector  . . . . . . . . . . . . . . . . . . . .  7
     5.2.  P-DCS-Billing-Info . . . . . . . . . . . . . . . . . . . .  7
     5.3.  P-Asserted-Identity  . . . . . . . . . . . . . . . . . . .  8
   6.  The P-Charge-Info Header . . . . . . . . . . . . . . . . . . .  8
     6.1.  Applicability Statement for the P-Charge-Info header . . .  8
     6.2.  Usage of the P-Charge-Info header  . . . . . . . . . . . .  8
       6.2.1.  Procedures at the UA . . . . . . . . . . . . . . . . .  9
       6.2.2.  Procedures at the Proxy  . . . . . . . . . . . . . . .  9
     6.3.  Example of Usage . . . . . . . . . . . . . . . . . . . . . 10
     6.4.  Optional Parameters  . . . . . . . . . . . . . . . . . . . 10
   7.  Formal Syntax  . . . . . . . . . . . . . . . . . . . . . . . . 10
   8.  IANA Considerations  . . . . . . . . . . . . . . . . . . . . . 11
   9.  Security Considerations  . . . . . . . . . . . . . . . . . . . 11
     9.1.  Trust Relationship . . . . . . . . . . . . . . . . . . . . 11
     9.2.  Untrusted Peers  . . . . . . . . . . . . . . . . . . . . . 12
       9.2.1.  Ingress from Untrusted Peers . . . . . . . . . . . . . 12
       9.2.2.  Egress to Untrusted Peers  . . . . . . . . . . . . . . 12
   10. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . 12
   11. Changes  . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
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