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Title : Interworking between Digital Subscriber Signalling
System No. one (DSS1) and Session Initiation
Author(s) : P. Kotar
Filename : draft-kotar-sipping-dss1-sip-iw-00.txt
Pages : 36
Date : 2003-2-26
This document specifies the interworking between the Digital Subscriber Signalling System No.one (DSS1) as specified in [1] and the Session Initiation Protocol (SIP) as specified in [2].
SIP is an Internet application-layer control protocol for creating, modifying, and terminating sessions with one or more participants. These sessions include, in particular, telephone calls. DSS1 is a signalling protocol for establishing, modifying and terminating circuit-switched calls, in particular telephone calls, within Public Integrated Services Digital Networks (ISDN)and between the Public network and Private Networks. DSS1 is specified in a number of ETSI Standards and published also as ITU-T standards.
The interworking SHALL be described from DSS1 viewpoint for the basic call procedures.
The interworking between the above signalling protocols occurs in a Media Gateway Controller (MGC), also called Softswitch which contains the protocol functionality for the ISDN subscribers and the SIP protocol functionality.
In case of contradictions between the mapping described in the present document and the requirements specified in the corresponding DSS1 standards and SIP RFC , the procedures in the DSS1 standards and SIP RFC applies.
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