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Patent

Accessing IP multimedia subsystem (IMS) services

Hans Lindgren
TLDR
In this article, a method of facilitating access to IP Multimedia Subsystem (IMS) services by non-IMS enabled terminals is proposed, such as blackphones and DECT phones are registered with a Home IMS gateway (Residential Gateway) and, in response to the registration, an IMS registration is performed, on behalf of the terminal, between the home gateway and the IMS, using information obtained from a Universal SIM application of a UICC.
Abstract
A method of facilitating access to IP Multimedia Subsystem (IMS) services by non-IMS enabled terminals. Non-IMS enabled terminals, such as blackphones and DECT phones are registered with a Home IMS gateway (Residential Gateway) and, in response to the registration, an IMS registration is performed, on behalf of the terminal, between the Home IMS gateway and the IMS, using information obtained from a Universal SIM application of a UMTS Integrated Circuit Card (UICC) present at the Home IMS Gateway. The Home IMS Gateway may comprise a SIP Back-to-Back User Agent having an interface to the ISIM on the UICC.

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Citations
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