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ISDN Q.921-User Adaptation Layer (RFC3057)

IP.com Disclosure Number: IPCOM000005251D
Original Publication Date: 2001-Feb-01
Included in the Prior Art Database: 2001-Aug-20

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

K. Morneault: AUTHOR [+4]

Abstract

This document defines a protocol for backhauling of ISDN Q.921 User messages over IP using the Stream Control Transmission Protocol (SCTP). This protocol would be used between a Signaling Gateway (SG) and Media Gateway Controller (MGC). It is assumed that the SG receives ISDN signaling over a standard ISDN interface.

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This is the abbreviated version, containing approximately 3% of the total text.

Network Working Group K. Morneault Request for Comments: 3057 Cisco Systems Category: Standards Track S. Rengasami

M. Kalla Telcordia Technologies

G. Sidebottom Nortel Networks

February 2001

ISDN Q.921-User Adaptation Layer

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 (2001). All Rights Reserved.

Abstract

This document defines a protocol for backhauling of ISDN Q.921 User messages over IP using the Stream Control Transmission Protocol (SCTP). This protocol would be used between a Signaling Gateway (SG) and Media Gateway Controller (MGC). It is assumed that the SG receives ISDN signaling over a standard ISDN interface.

Morneault, et al. Standards Track [Page 1]

RFC 3057 ISDN Q.921-User Adaptation Layer February 2001

Table of Contents

1. Introduction................................................. 2 1.1 Scope..................................................... 2 1.2 Terminology............................................... 3 1.3 IUA Overview.............................................. 4 1.4 Services Provided by the IUA Layer........................ 9 1.5 Functions Implemented by the IUA Layer.................... 12

1.6 Definition of IUA Boundaries.............................. 14 2. Conventions.................................................. 16 3. Protocol Elements............................................ 17 3.1 Common Message Header..................................... 17 3.2 IUA Message Header........................................ 20

3.3 Description of Messages................................... 22 4. Procedures................................................... 45 4.1 Procedures to Support Service in Section 1.4.1............ 45 4.2 Procedures to Support Service in Section 1.4.2............ 46

4.3 Procedures to Support Service in Section 1.4.3............ 47 5. Examples...................................................... 56 5.1 Establishment of associations between SG and MGC examples.. 56 5.2 ASP Traffic Fail-over Examples............................. 58 5.3 Q.921/Q.931 primitives backhaul Examples................... 59

5.4 Layer Management Communication Examples.................... 61 6. Security..................................................... 61 6.1 Threats.................................................... 61

6.2 Protecting Confidentiality ................................ 62 7. IANA Considerations.......................................... 62 7.1 SCTP Payload Protocol Identifier........................... 62

7.2 IUA Protocol Extensions.................................... 62 8. Acknowledgements............................................. 64 9. References....................................