Radiotelephone communication system

Claim 2

A radiotelephone communication system between telephone networks served by toll exchanges and mobile telephone sets over a geographical area covered by a plurality of radiotelephone exchanges connected over a distance to said toll exchanges; said system comprising: a service information transmission link releasably connected between toll exchanges and radiotelephone exchanges; means for connecting said transmission link in parallel with an outgoing switching chain in each of the toll exchanges and with an incoming switching chain in each of the radiotelephone exchanges; means for signalling the call number of a called mobile set via said transmission link from a calling toll exchange to all the radiotelephone exchanges; means, in said exchanges, for broadcasting this number via a radiotelephone chain; means for transmitting switching information from that radiotelephone exchange which receives a reply from called mobile set to the calling toll exchange by said service link; and, means in said calling toll exchange for extending thereupon the telephone link by the outgoing switching chain of said calling toll exchange towards the answering exchange and via the incoming switching chain and the radiotelephone chain in said radio exchange.

Claim 3

A radiotelephone communication system between telephone networks served by toll exchanges and mobile telephone sets over a geographical area covered by a plurality of radiotelephone exchanges connected over a distance to said toll exchanges; said system comprising: a service information transmission link releasably connected between toll exchanges and radiotelephone exchanges; means for connecting said transmission link in parallel with an outgoing switching chain in each of the toll exchanges and with an incoming switching chain in each of the radiotelephone exchanges; means for signalling the call number of a called mobile set via said transmission link from a calling toll exchange to all the radiotelephone exchanges; means, in said exchanges, for broadcasting this number via a radiotelephone chain; means in each the toll exchanges for connecting said transmission link to a toll exchange junctor having access to the outgoing switching chain; means in the radiotelephone exchanges for connecting said service link to a radiotelephone exchange junctor accessible from the incoming switching chain for connecting this last junctor to an input of the radiotelephone chain and for guarding in the last said chain an established path for reaching the mobile set, after a called mobile set has replied; and means for extending the telephone link from said junctor in the toll exchange via the outgoing switching chain in this toll exchange and the incoming switching chain in the answering radiotelephone exchange up to said junctor in said radiotelephone exchange, and finally, via the guarded path in the radiotelephone chain.

Claim 4

A radiotelephone communication system between telephone networks served by toll exchanges and mobile telephone sets over a geographical area covered by a plurality of radiotelephone exchanges connected over a distance to said toll exchanges; said system comprising: a service information transmission link releasably connected between toll exchanges and radiotelephone exchanges; means for connecting said transmission link in parallel with an outgoing switching chain in each of the toll exchanges and with an incoming switching chain in each of the radiotelephone exchanges; means for signalling the call number of a called mobile set via said transmission link from a calling toll exchange to all the radiotelephone exchanges; means, in said exchanges, for broadcasting this number via a radiotelephone chain; means in each the toll exchanges for connecting said transmission link to a toll exchange junctor having access to the outgoing switching chain; means in the radiotelephone exchanges for connecting said service link to a radiotelephone exchange junctor accessible from the incoming switching chain for connecting this last junctor to an input of the radiotelephone chain and for guarding in the last said chain an established path for reaching the mobile set, after a called mobile set has replied; and means for extending the telephone link from said junctor in the toll exchange via the outgoing switching chain in this toll exchange and the incoming switching chain in the answering radiotelephone exchange up to said junctor in said radiotelephone exchange, and finally, via the guarded path in the radiotelephone chain.

Claim 5

A radiotelephone system according to claim 2 in which said toll exchange junctor similar to the incoming junctors, which is borne by is coupled to an output level of incoming selectors; and the outputs of said toll exchange junctor are connected to the further portion of the switching chaIn as are the outputs of the incoming selectors.

Claim 6

A system according to claim 2, in which said radio telephone exchange junctor is coupled to a terminal output position of the telephone-switching chain; and the switching information transmitted by said radiotelephone exchange to the toll exchange comprises the identity of the terminal position.

Claim 7

A system according to claim 4, in which the radiotelephone chain is reached by a group selection stage of the telephone-switching chain and comprises a telephone terminal selection stage, the output of said radiotelephone exchange junctor is connected to an input of this radiotelephone chain so that the extended telephone link continues after said selection stage, via the telephone terminal selection stage, then by said radiotelephone exchange junctor, and from there by said terminal selection stage in the radiotelephone stage.

Claim 8

A system according to claim 2, in which the guarded path in the radio telephone chain is guarded in a ready-to-ring condition, and in which the ringing signal is sent to the mobile set as soon as the extended telephone link is connected to this path.

Claim 9

A system according to claim 1 in which means are provided for releasing the service link between the toll exchanges and the radiotelephone exchanges after the mobile set has sent out the call number when said number is assigned to a simple call receiver.