1. Interworking for IMS
Interworking procedures are provided to guarantee interoperability between IMS and non-IMS users. These procedures concern interworking between IMS-type networks and other existing networks such as circuit-type networks (GSM, PSTN) and networks using classic SIP signaling (classic IETF SIP stack).
Note
acronyms are explained in the Acronyms and Abbreviations table at the end of this article.
Interworking between the IMS domain and the circuit domain enables a session to be established from one domain to the other.
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Interworking for IMS