Trunk circuit with pulse delay

Claim 2

In a communication switching system: a plurality of incoming trunks; pulse-receiving means; timing means for selectively defining a predetermined period of time; delay means associated with at least certain of said trunks for delaying all incoming pulses by said predetermined period of time; means for selectively connecting said delay means to said pulse receiving means; and means responsive to signals appearing on each of said trunks to control said connecting means.

Claim 3

In a communication switching system: a plurality of incoming trunks; pulse-receiving means; delay means associated with at least certain of said trunks for delaying all incoming pulses by equal predetermined periods of time, said delay means comprising a multistage shift register; a pulse source for generating advance signals for controlling said shift register; means for selectively connecting said delay means to said pulse-receiving means; and means responsive to signals appearing on each of said trunks to control said connecting means.

Claim 4

In a communication switching system: a plurality of incoming trunks; pulse-receiving means; delay means associated with at least certain of said trunks for delaying all incoming pulses by equal predetermined periods of time, said delay means comprising a multistage shift register; a pulse source for generating advance signals for controlling said shift register; means for selectively connecting said delay means to said pulse-receiving means; and means responsive to signals appearing on each of said trunks to control said connecting means.

Claim 5

A communication-switching system in accordance with claim 2 wherein said pulse source includes means for generating advance signals having selected repetition rates dependent upon the traffic load of the system.

Claim 6

In a telephone switching system: a plurality of incoming trunks; a plurality of pulse-receiving means; connecting means operative to selectively interconnect said incoming trunks and said pulse receiving means; means responsive to signals appearing on each of said trunks to control said connecting means; and delay means in each of said trunks for delaying all incoming pulses for an equal predetermined period of time, said period of time being greater than the time required for the selective interconnecting of one of said plurality of incoming trunks to one of said plurality of pulse receiving means.

Claim 7

In a telephone switching system: a plurality of incoming trunks; a plurality of pulse-receiving means; connecting means operative to selectively interconnect said incoming trunks and said pulse receiving means; means responsive to signals appearing on each of said trunks to control said connecting means; and delay means in each of said trunks for delaying all incoming pulses for an equal predetermined period of time, said period of time being greater than the time required for the selective interconnecting of one of said plurality of incoming trunks to one of said plurality of pulse receiving means.

Claim 8

In a telephone system: a plurality of incoming trunks; a plurality of corresponding incoming trunk circuits; a plurality of dial pulse receivers; connecting means responsive to control signals for selectively connecting said incoming trunk circuits to said dial pulse receivers; means responsive to signals appearing on each of said incoming trunks for applying said control signals to said connecting means; and wherein the improvement comprises shift register means in each of said incoming trunk circuits for delaying all dial pulses received on said corresponding incoming trunk by an equal predetermined period of time.

Claim 9

In a telephone system: a plurality of incoming trunks; a plurality of corresponding incoming trunk circuits; a plurality of dial pulse receivers; connecting means responsive to control signals for selectively connecting said incoming trunk circuits to said dial pulse receivers; means responsive to signals appearing on each of said incoming trunks for applying said control signals to said connecting means; and wherein the improvement comprises shift register means in each of said incoming trunk circuits for delaying all dial pulses received on said corresponding incoming trunk by an equal predetermined period of time.

Claim 10

An incoming trunk circuit for a communication switching system comprising: first conductor means for connecting said trunk circuit to a distant office; second conductor means for connecting said trunk circuit to a switching network; shift register means having a plurality of stages; pulse-repeating means responsive to pulses appearing on said first conductor means for applying input signals to the first of said stages; means for applying advance pulses to said stages; means controlled by the last of said stages for applying output pulses to said second conductor means; and means responsive to said pulse-repeating means and to a plurality of the stages of said shift register for generating a control signal for the switching network.

Claim 11

An incoming trunk circuit for a communication switching system comprising: first conductor means for connecting said trunk circuit to a distant office; second conductor means for connecting said trunk circuit to a switching network; shift register means having a plurality of stages; pulse-repeating means responsive to pulses appearing on said first conductor means for applying input signals to the first of said stages; means for applying advance pulses to said stages; means controlled by the last of said stages for applying output pulses to said second conductor means; and means responsive to said pulse-repeating means and to a plurality of the stages of said shift register for generating a control signal for the switching network.

Claim 12

An incoming trunk circuit in accordance with claim 6 wherein said advance pulse-applying means includes means for generating advance pulses at different selected rates.

Claim 13

An incoming trunk circuit in accordance with claim 6 further comprising means defining a plurality of states of the trunk circuit and means for disconnecting said output pulse-applying means from said second conductor means when the trunk circuit is in other than a dial pulse-receiving state.

Claim 14

An incoming trunk circuit in accordance with claim 8 wherein said pulse-repeating means includes a relay having a winding connected across said first conductor means and a contacT of said relay connected to said first stage, said means defining a plurality of states includes state relays, said output pulse-applying means includes a transistor connected across said second conductor means, and said disconnecting means includes contacts of each of said state relays.

Claim 15

In a communication system: a plurality of incoming trunks; a corresponding plurality of incoming trunk circuits; a plurality of dial pulse receivers; connecting means responsive to control signals for selectively connecting said incoming trunk circuits to said dial pulse receivers; means in each of said trunk circuits responsive to seizure signals received from said corresponding incoming trunk for generating connection request signals; means responsive to said connection request signals for generating said control signals for said connecting means; shift register means in each of said incoming trunk circuits for delaying by an equal period of time all dial pulses received from said corresponding incoming trunk; and means responsive to the traffic load of the system for defining said period of time.

Claim 16

In a communication system: a plurality of incoming trunks; a corresponding plurality of incoming trunk circuits; a plurality of dial pulse receivers; connecting means responsive to control signals for selectively connecting said incoming trunk circuits to said dial pulse receivers; means in each of said trunk circuits responsive to seizure signals received from said corresponding incoming trunk for generating connection request signals; means responsive to said connection request signals for generating said control signals for said connecting means; shift register means in each of said incoming trunk circuits for delaying by an equal period of time all dial pulses received from said corresponding incoming trunk; and means responsive to the traffic load of the system for defining said period of time.