Alarm arrangement for a time-division multiplex, pulse-code modulation carrier system

Claim 2

In a multi-channel, time-division multiplex, pulse-code modulation carrier system having a distant transmitter and a near receiver, wherein a predetermined number of pulses representing each channel are sequentially combined to form a frame, wherein a predetermined number of frames form a superframe in which one predetermined frame is used for primary signaling for each channel and another predetermined frame is used for secondary signaling for each channel, an improved arrangement for transmitting alarm information from said distant transmitter to said near receiver, said distant transmitter comprising: a. a plurality of input means, each of which is adapted to be supplied with a respective alarm signal at said distant transmitter; b. means connected to said input means for combining signals therefrom in a time sequence corresponding to the channel sequence of the carrier system; c. a control gate adapted to be connected to the source of primary signaling for producing an open signal in response to primary signaling indicating each idle channel and a close signal in response to primary signaling indicating each busy channel; d. an alarm gate connected to said combining means and connected to said control gate output for passing an alarm signal in response to each open signal and for blocking alarm signals in response to each close signal; e. and an inserting gate adapted to be connected to the source of secondary signaling and connected to said alarm gate for replacing said secondary signals in response to any alarm signals passed by said alarm gate; and said near receiver comprising: f. a plurality of memory devices adapted to be supplied with primary signaling for respectively indicating which of said channels are idle for the duration of a superframe; g. and a plurality of alarm gates respectively connected to said memory devices and adapted to be connected to the source of secondary signaling, each of said alarm gates producing an alarm signal in response to an idle condition in its respective channel followed by an alarm signal in the same respective channel.

Claim 3

The improved arrangement of claim 1 wherein said memory devices and said alarm gates of said near receiver comprise flip-flops.

Claim 4

In a mutli-channel, time division multiplex, pulse-code modulation carrier system having a distant transmitter and a near receiver, wherein a predetermined number of pulses representing each channel are sequentially combined to form a frame, wherein a predetermined number of frames form a superframe in which a first predetermined frame is used for primary signaling for each channel and in which a second predetermined frame is used for secondary signaling for each channel, an improved arrangement for transmitting alarm information from said distant transmitter to said near receiver, said distant transmitter comprising: a. a plurality of timing gates each having a first input adapted to be supplieD with a respective alarm signal, having a second input adapted to be supplied with a respective channel timing pulse of said transmitter, and having an output which produces an alarm signal in response to the simultaneous presence of an alarm signal and a channel timing pulse at its inputs; b. a combining gate having a plurality of inputs, each of which is respectively connected to the output of one of said timing gates, and having an output which produces a sequence of alarm signals in response to alarm signals from said timing gates; c. an alarm gate having a first input adapted to be supplied with the primary signaling of said transmitter, having a second input connected to said combining gate output, and having an output which produces an alarm signal in response to the simultaneous presence of an idle signal from said primary signaling and an alarm signal from said combining gate; d. an alarm inserting gate having a first input adapted to be supplied with the secondary signaling of said transmitter, having a second input connected to said alarm gate output, and having an output which produces an alarm signal in response to each alarm signal applied to said second input and which produces a secondary signaling in the absence of said alarm signal applied to said second input; e. and means connected to said alarm inserting gate output for applying signals thereat to said transmitter; and said near receiver comprising: f. a plurality of first timing gates each having a first input adapted to be supplied with a respective channel timing pulse of said receiver, having a second input adapted to be supplied with a bit from each channel in the first predetermined frame for primary signaling, and having an output for producing a timing signal in response to the simultaneous presence of a channel pulse and said bit; g. a plurality of memory flip-flops each having a steering input adapted to be supplied with the received primary signaling of said receiver, having a clock input connected to a respective output of one of said first timing gates, and having an output which indicates the idle condition of a respective channel; h. a plurality of second timing gates each having a first input connected to a respective output of one of said memory flip-flops, having a second input adapted to be supplied with a bit from each channel in the second predetermined frame for secondary signaling, having a third input adapted to be supplied with a respective channel timing pusle of said receiver, and having an output for producing an output signal in response to the simultaneous presence of said bit, said channel pulse, and a stored idle condition; i. and a plurality of output flip-flops each having a preset input connected to a respective output of one of said memory flip-flops, a steering input adapted to be supplied with the received secondary signaling of said receiver, having a clock input connected to a respective output of one of said second timing gates, and having an output for producing an alarm signal in response to an idle indication at its preset input followed by an alarm signal at its steering input and an output signal from its respective second timing gate.

Claim 5

In a mutli-channel, time division multiplex, pulse-code modulation carrier system having a distant transmitter and a near receiver, wherein a predetermined number of pulses representing each channel are sequentially combined to form a frame, wherein a predetermined number of frames form a superframe in which a first predetermined frame is used for primary signaling for each channel and in which a second predetermined frame is used for secondary signaling for each channel, an improved arrangement for transmitting alarm information from said distant transmitter to said near receiver, said distant transmitter comprising: a. a plurality of timing gates each having a first input adapted to be supplieD with a respective alarm signal, having a second input adapted to be supplied with a respective channel timing pulse of said transmitter, and having an output which produces an alarm signal in response to the simultaneous presence of an alarm signal and a channel timing pulse at its inputs; b. a combining gate having a plurality of inputs, each of which is respectively connected to the output of one of said timing gates, and having an output which produces a sequence of alarm signals in response to alarm signals from said timing gates; c. an alarm gate having a first input adapted to be supplied with the primary signaling of said transmitter, having a second input connected to said combining gate output, and having an output which produces an alarm signal in response to the simultaneous presence of an idle signal from said primary signaling and an alarm signal from said combining gate; d. an alarm inserting gate having a first input adapted to be supplied with the secondary signaling of said transmitter, having a second input connected to said alarm gate output, and having an output which produces an alarm signal in response to each alarm signal applied to said second input and which produces a secondary signaling in the absence of said alarm signal applied to said second input; e. and means connected to said alarm inserting gate output for applying signals thereat to said transmitter; and said near receiver comprising: f. a plurality of first timing gates each having a first input adapted to be supplied with a respective channel timing pulse of said receiver, having a second input adapted to be supplied with a bit from each channel in the first predetermined frame for primary signaling, and having an output for producing a timing signal in response to the simultaneous presence of a channel pulse and said bit; g. a plurality of memory flip-flops each having a steering input adapted to be supplied with the received primary signaling of said receiver, having a clock input connected to a respective output of one of said first timing gates, and having an output which indicates the idle condition of a respective channel; h. a plurality of second timing gates each having a first input connected to a respective output of one of said memory flip-flops, having a second input adapted to be supplied with a bit from each channel in the second predetermined frame for secondary signaling, having a third input adapted to be supplied with a respective channel timing pusle of said receiver, and having an output for producing an output signal in response to the simultaneous presence of said bit, said channel pulse, and a stored idle condition; i. and a plurality of output flip-flops each having a preset input connected to a respective output of one of said memory flip-flops, a steering input adapted to be supplied with the received secondary signaling of said receiver, having a clock input connected to a respective output of one of said second timing gates, and having an output for producing an alarm signal in response to an idle indication at its preset input followed by an alarm signal at its steering input and an output signal from its respective second timing gate.