US 6,311,073 B1 · System for connecting a telephone switch to a fixed telephone network via a plurality of fixed radiotelephone terminals

Abstract

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.

Claims5

Dependent claims

A system for connecting a telephone switch to a fixed telephone network via a radiotelephone network, the system including a plurality of fixed radiotelephone terminals connecting the switch to the radiotelephone network, and a plurality of user terminals connected to the switch, the system comprising:

call forwarding means for forwarding a call, addressed to a called one of the user terminals and containing a directory number of the called user terminal, to a mobile service switching center providing access to the called user terminal, the forwarded call containing a directory number designating a first one of said fixed radiotelephone terminals associated with the directory number of the called user terminal;
and
means situated in said center for operating as follows:
if said first terminal is busy, forwarding said call to a second one of said fixed radiotelephone terminals designated by its international mobile subscriber identity (IMSI) number, said IMSI number of the second terminal being associated with the directory number of the called user terminal in a visitor location register associated with said center;
and
if said second terminal is busy, forwarding said call to a third fixed radiotelephone terminal designated by its IMSI number, said IMSI number of the third terminal being associated with the directory number of the called user terminal in the visitor location register associated with said center;
if necessary, forwarding said call in like manner to a next IMSI number until an available one of said fixed radiotelephone terminals is found, if any.

4 more elements

A method of connecting a telephone switch to fixed telephone network via a radiotelephone network using a plurality of fixed radiotelephone terminals, a plurality of user terminals connected to said telephone switch, comprising the steps of:

forwarding a call, addressed to and containing a directory number of a called one of the user terminals, to a mobile service switching center providing access to the called user terminal, the forwarded call containing a directory number designating a first fixed one of the radiotelephone terminals associated with the directory number of the called user terminal;
if said first fixed radiotelephone terminal is busy, forwarding said call to a second fixed radiotelephone terminal designated by its international mobile subscriber identity (IMSI) number, said IMSI number of the second fixed radiotelephone terminal being associated with the directory number of the called user terminal in a visitor location register associated with said center;
and
if said second fixed radiotelephone terminal is busy, forwarding said call to a third fixed radiotelephone terminal designated by its IMSI number, said IMSI number of the third fixed radiotelephone terminal being associated with the directory number of the called user terminal in the visitor location register associated with said center;
if necessary, forwarding said call in like manner to a next IMSI number until an available one of the fixed radiotelephone terminals is found, if any.

2 more elements

Dependencies are inferred from the claim text.

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

Life of this patent

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

Life of this patent

Abstract

Claims5