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Digital Private Network Signaling System (DPNSS)/Digital Access Signaling System 2 (DASS 2) Extensions to the IUA Protocol
RFC 4129

Document type: RFC - Proposed Standard (September 2005; No errata)
Document stream: IETF
Last updated: 2013-03-02
Other versions: plain text, pdf, html

IETF State: (None)
Consensus: Unknown
Document shepherd: No shepherd assigned

IESG State: RFC 4129 (Proposed Standard)
Responsible AD: Jon Peterson
Send notices to: <lyong@ciena.com>

Network Working Group                                        R. Mukundan
Request for Comments: 4129                            Wipro Technologies
Category: Standards Track                                   K. Morneault
                                                           Cisco Systems
                                                          N. Mangalpally
                                                         Nortel Networks
                                                             August 2005

           Digital Private Network Signaling System (DPNSS)/
               Digital Access Signaling System 2 (DASS 2)
                     Extensions to the IUA Protocol

Status of This Memo

   This document specifies an Internet standards track protocol for the
   Internet community, and requests discussion and suggestions for
   improvements.  Please refer to the current edition of the "Internet
   Official Protocol Standards" (STD 1) for the standardization state
   and status of this protocol.  Distribution of this memo is unlimited.

Copyright Notice

   Copyright (C) The Internet Society (2005).

Abstract

   This document defines a mechanism for backhauling Digital Private
   Network Signaling System 1 (DPNSS 1) and Digital Access Signaling
   System 2 (DASS 2) messages over IP by extending the ISDN User
   Adaptation (IUA) Layer Protocol defined in RFC 3057.  DPNSS 1,
   specified in ND1301:2001/03 (formerly BTNR 188), is used to
   interconnect Private Branch Exchanges (PBX) in a private network.
   DASS 2, specified in BTNR 190, is used to connect PBXs to the PSTN.
   This document aims to become an Appendix to IUA and to be the base
   for a DPNSS 1/DASS 2 User Adaptation (DUA) implementation.

Mukundan, et al.            Standards Track                     [Page 1]
RFC 4129      DPNSS/DASS 2 Extensions to the IUA Protocol    August 2005

Table of Contents

   1.  Introduction .................................................  2
       1.1.  Scope ..................................................  2
       1.2.  Terminology ............................................  3
       1.3.  DPNSS Overview .........................................  4
       1.4.  Proposed DPNSS Backhaul Architecture ...................  5
   2.  Changes from IUA .............................................  5
       2.1.  New Message Class for DUA ..............................  5
       2.2.  Message Header .........................................  6
       2.3.  Unit Data Message ......................................  7
       2.4.  DLC Status Message .....................................  7
       2.5.  Management (MGMT) Messages .............................  9
   3.  IANA Considerations .......................................... 10
   4.  Use of SCTP Payload Protocol ID .............................. 10
   5.  Message Sequence in DUA ...................................... 11
       5.1.  Resetting of single DLC ................................ 11
       5.2.  Resetting all DLCs in a Link ........................... 11
       5.3.  Information Transfer on a DLC .......................... 12
       5.4.  Link Takedown (Single DLC) ............................. 12
       5.5.  Link Takedown (All DLCs) ............................... 12
       5.6.  Getting Link Status .................................... 12
       5.7.  Error Conditions ....................................... 12
   6.  Security Considerations ...................................... 13
   7.  References ................................................... 13
       7.1.  Normative References ................................... 13
   8.  Acknowledgements ............................................. 13

1.  Introduction

   This document describes a method of implementing Digital Private
   Network Signaling System 1 (DPNSS 1) [2] (henceforth referred to as
   just DPNSS) and Digital Access Signaling System 2 (DASS 2)[3]
   backhaul messaging over IP using a modified version of the ISDN User
   Adaptation Protocol (IUAP) [1].  The DPNSS/DASS 2 User Adaptation
   (DUA) builds on top of IUA by defining the necessary extensions to
   IUA for a DPNSS/DASS2 implementation.

1.1.  Scope

   There is a need for Switched Circuit Network (SCN) signaling protocol
   delivery from a DPNSS Signaling Gateway (SG) to a Media Gateway
   Controller (MGC).  The delivery mechanism should support the
   following protocols:

      -  DPNSS (Digital Private Network Signaling System) [2]
      -  DASS 2 (Digital Access Signaling System Number 2) [3]

Mukundan, et al.            Standards Track                     [Page 2]
RFC 4129      DPNSS/DASS 2 Extensions to the IUA Protocol    August 2005

   Unless specifically mentioned, the details in this document are

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