Alcatel

Jean Charpentier

Edouard Issenmann

Jean-Pierre Aucoeur

Erick Flores

Antoine Totaro

Jean-No&euml;l Martin

Roger Larousse

Jean-Francois Criqui

Roland Thies

Olivier Doutheau

Patrick Lohat

Apparatus for connecting telephone switch to fixed telephone network or PSTN via a radiotelephone network of GSM type or type derived therefrom. A fixed radiotelephone terminal (RT) has a processor that identifies calls containing an identity belonging to a predetermined set of international mobile subscriber identities (IMSIs), and calls containing an identity belonging to a predetermined set of temporary mobile subscriber identities (TMSIs), both of the sets corresponding to user terminals (UT . . . , UT ) which are connected to the switch. The radiotelephone network issues a distinct invoice for each user terminal (UT . . . , UT ) even though the same fixed radiotelephone terminal (RT) is used by a plurality of different users, and the radiotelephone network can perform direct inward dialing to each user terminal (UT . . . , UT ).

Device for connecting a telephone switch to a fixed telephone network via a radio telephone network

In a GSM type system, home location register resets after some incidents are programmed from a back-up register. The invention proposes that mobile service switching centers create a difference between two classes of update requests which they send to the home location register in two different situations. In the first class a message following a change of area by a mobile station takes priority. In the second class a message follows a home location register reset and tends to (frequently unnecessarily) re-establish the conformity of the data in the home location register and in the visitor location registers of the centers. The second class is assigned a low priority level which prevents problems with the availability of the home location register. Application to telephony.

Mobile telephony method and system using signaling messages with priority levels

A system that forwards a call addressed to one of a plurality of user terminals and contains a directory number of the called user terminal to a mobile service switching center giving access to the called user terminal. The system sends to the mobile service switching center an IAM message containing the directory number of the called user terminal. The mobile service switching center supplies the directory number to a radiotelephone terminal as a SETUP message. The fixed radiotelephone terminal extracts the directory number of the called user terminal from the SETUP message received for setting up each call, and sends said number to the switch in the form of a conventional signaling message.

System for identifying a called terminal amongst a plurality of user terminals connected to a telephone switch, the telephone switch being connected to at least one fixed radiotelephone terminal

A system includes: a plurality of fixed radiotelephone terminals connected to a telephone switch serving user terminals; call forwarding circuitry for forwarding a call addressed to one of the user terminals to a mobile service switching center managing the radiotelephone terminals, and providing access to the called user terminal, the forwarded call containing the identity of the called user terminal and containing the identity of the fixed radiotelephone terminal that is the first available in a list of radiotelephone terminals associated with the identity of the called user terminal; and, circuitry situated in the switching center to forward the call to a second fixed radiotelephone terminal designated by its international mobile subscriber identity number if the first terminal is busy. If the second terminal is busy, the switching center forwards the call to a third fixed radiotelephone terminal designated by its international mobile subscriber identity number. The system continues until a non-busy terminal can be used, while making use of a home location register only once. The switching center supplies the identity of the called user terminal to the radiotelephone terminal being used. The system is suitable for extending the public telephone network to isolated communities.

System for connecting a telephone switch to a fixed telephone network via a plurality of fixed radiotelephone terminals

The present invention relates to a method of routing a call between a first terminal which is a mobile terminal (,) and a second terminal (,) in a global telecommunications network, it being possible for the call to be routed in the global network a)&mdash;at least in part through a satellite telecommunications network (,) using base stations (,) giving access to satellites, and b) &mdash;at least in part through a terrestrial telecommunications network (PSTN) connected to the base stations (,), each satellite (,) in the satellite telecommunications network defining an overall coverage area covering a plurality of base stations, the overall coverage area defining a plurality of coverage sub-areas, each of which is associated with a respective one of the base stations (,). The method is characterized in that it includes a location updating step in which the location of the first terminal (,) is updated as being in coverage sub-area associated with that one of the base stations (,) which is closest to the second terminal so as to minimize the routing distance over which the call travels through the terrestrial telecommunications network (PSTN).

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Viroflay, France

Jean Charpentier