Radio paging system

Claim 2

Radio paging apparatus comprising signal input means, input signal decoding means, and paging encoding means, said signal input means being connectable to a transmission line, said signal input means being suitable for transferring first and second sequences of dual-frequency tones from said transmission line to said input signal decoding means, said input signal decoding means comprising sequence detectors responsive to predetermined sequences of specific dual-frequency tones, said sequence detectors providing a first output when said first sequence of dual-frequency tones contains predetermined dual-frequencies in proper sequence, said sequence detectors providing a second output when said second sequence of dual-frequency tones contains predetermined dual-frequencies in proper sequence, said first output programming said paging encoding means to produce a first paging tone, said second output programming said paging encoding means to produce a second paging tone, said first and second paging tones comprising a paging signal being suitable for transmission by transmitting means to receiving means responsive to said paging signal.

Claim 3

An interconnected radio paging system comprising first and second signal input means, first and second input signal decoders, first and seCond paging encoders, first and second transmitters, said first signal input means being connected to a first transmission line, said first signal input means adapted for transferring first input signals from said first transmission line to said first input signal decoder, said first input signal decoder being responsive to predetermined input signals from said first signal input means, the response from said first input signal decoder programming said first paging encoder, said first paging encoder providing first paging signals which are transmitted by electromagnetic radiation by said first transmitter, said second signal input means being connected to a second transmission line, said second signal input means adapted for transferring second input signals from said second transmission line to said second input signal decoder, said second input signal decoder being responsive to predetermined input signals from said second signal input means, the response from said second input signal decoder programming said second paging encoder, said second paging encoder providing second paging signals which are transmitted by electromagnetic radiation by said second transmitter, a second receiver associated with said second transmitter, said first signal input means transferring the first input signal to the first transmitter, the first input signal being transmitted by said first transmitter to said second receiver, and said second receiver transferring said first input signal to said second signal input means where it is transferred to said second input signal decoder.

Claim 4

An interconnected radio paging system comprising first and second signal input means, first and second input signal decoders, first and seCond paging encoders, first and second transmitters, said first signal input means being connected to a first transmission line, said first signal input means adapted for transferring first input signals from said first transmission line to said first input signal decoder, said first input signal decoder being responsive to predetermined input signals from said first signal input means, the response from said first input signal decoder programming said first paging encoder, said first paging encoder providing first paging signals which are transmitted by electromagnetic radiation by said first transmitter, said second signal input means being connected to a second transmission line, said second signal input means adapted for transferring second input signals from said second transmission line to said second input signal decoder, said second input signal decoder being responsive to predetermined input signals from said second signal input means, the response from said second input signal decoder programming said second paging encoder, said second paging encoder providing second paging signals which are transmitted by electromagnetic radiation by said second transmitter, a second receiver associated with said second transmitter, said first signal input means transferring the first input signal to the first transmitter, the first input signal being transmitted by said first transmitter to said second receiver, and said second receiver transferring said first input signal to said second signal input means where it is transferred to said second input signal decoder.

Claim 5

The interconnected radio paging system of claim 2 wherein the second signal input means functions, when the first input signal is derived from the second receiver, to prevent a second input signal to be received from the second transmission line and to prevent the first input signal from being transmitted by the second transmitter.

Claim 6

The interconnected radio paging system of claim 2 wherein the first transmitter operates on the same carrier frequency as the second transmitter.

Claim 7

An interconnected radio paging system comprising first and second signal input means, first and second input signal decoders, first and second paging encoders, first and second transmitters, said first signal input means being connected to a first transmission line, said first signal input means adapted for transferring first input signals from said first transmission line to said first input signal decoder, said first input signal decoder being responsive to predetermined input signals from said first signal input means, the response from said first input signal decoder programming said first paging encoder, said first paging encoder providing first paging signals which are transmitted by electromagnetic radiation by said first transmitter, a second receiver associated with the second transmitter, said first signal input means transferring the first input signal to said first transmitter, the first input signal being transmitted by said first transmitter to said second receiver, said second receiver transferring said first input signal to said second signal input means where it is transferred to said second input signal decoder, said second input signal decoder being responsive to predetermined input signals from said second signal input means, the response from said second input signal decoder programming said second paging encoder, said second paging encoder providing second paging signals which are transmitted by electromagnetic radiation by said second transmitter, said first and second transmitters operating on the same carrier frequency.

Claim 8

An interconnected radio paging system comprising first and second signal input means, first and second input signal decoders, first and second paging encoders, first and second transmitters, said first signal input means being connected to a first transmission line, said first signal input means adapted for transferring first input signals from said first transmission line to said first input signal decoder, said first input signal decoder being responsive to predetermined input signals from said first signal input means, the response from said first input signal decoder programming said first paging encoder, said first paging encoder providing first paging signals which are transmitted by electromagnetic radiation by said first transmitter, a second receiver associated with the second transmitter, said first signal input means transferring the first input signal to said first transmitter, the first input signal being transmitted by said first transmitter to said second receiver, said second receiver transferring said first input signal to said second signal input means where it is transferred to said second input signal decoder, said second input signal decoder being responsive to predetermined input signals from said second signal input means, the response from said second input signal decoder programming said second paging encoder, said second paging encoder providing second paging signals which are transmitted by electromagnetic radiation by said second transmitter, said first and second transmitters operating on the same carrier frequency.

Claim 9

An interconnected radio paging system comprising at least first and second paging subsystems, means in said first paging subsystem for transmitting paging signals which are responsive to input signals received by said first paging subsystem from a first telephone line, means in said second paging subsystem for transmitting paging signals which are responsive to input signals received by said second paging subsystem from a second telephone line, said first paging subsystem also transmitting paging signals which are responsive to input signals received by said second paging subsystem from the second telephone line, said second paging subsystem also transmitting paging signals which are responsive to input signals received by said first paging subsystem from the first telephone line, the paging signals from said first and second paging subsystems being transmitted on substantially the same carrier frequency, the input signals being transferred from one paging subsystem to the other paging subsystem on said same carrier frequency, and means for delaying the transmission of the paging signals in each of said paging subsystems until the input signal from the other paging subsystem has been received.

Claim 10

An interconnected radio paging system comprising at least first and second paging subsystems, means in said first paging subsystem for transmitting paging signals which are responsive to input signals received by said first paging subsystem from a first telephone line, means in said second paging subsystem for transmitting paging signals which are responsive to input signals received by said second paging subsystem from a second telephone line, said first paging subsystem also transmitting paging signals which are responsive to input signals received by said second paging subsystem from the second telephone line, said second paging subsystem also transmitting paging signals which are responsive to input signals received by said first paging subsystem from the first telephone line, the paging signals from said first and second paging subsystems being transmitted on substantially the same carrier frequency, the input signals being transferred from one paging subsystem to the other paging subsystem on said same carrier frequency, and means for delaying the transmission of the paging signals in each of said paging subsystems until the input signal from the other paging subsystem has been received.