Nortel Networks TP-1610 SIP user manual Appendix J SS7 Tunneling

Mediant 2000 SIP User’s Manual J. SS7 Tunneling

Appendix J SS7 Tunneling

The Signaling System 7 (SS7) tunneling feature facilitates peer-to-peer transport of SS7 links between gateways that support AudioCodes' unique MTP2 (Message Transfer Part) Tunneling application (M2TN) for transferring SS7 MTP2 link data over IP. In this scenario, both sides of the link are pure TDM switches and are unaware of the IP tandem that is utilized between them. Using M2TN, the network operator can support SS7 connections over IP, carrying MTP level 3, as well as higher level SS7 layers (e.g., user parts and application protocols, such as TUP (Telephone User Part), Integrated ISUP (Services User Part), SCCP (Signaling Connection Control Part), TCAP (Transaction Capabilities Application Part), etc.).

M2TN uses standard protocols, such as SIGTRAN (RFC 2719 Architectural Framework for Signaling Transport), SCTP (RFC 2960, Stream Control Transmission Protocol), M2UA (RFC 3331, MTP2 User Adaptation Layer), the latter being used for transporting SS7-MTP2 signaling information over IP. M2UA architecture is shown in Figure J-1. M2TN architecture is shown in Figure J-2.

Figure J-1: M2UA Architecture

Figure J-2: M2TN Architecture

Version 4.4 231 July 2005