Telephone switching system scanning and identification arrangement

Claim 2

In a switching system, a switching network having line circuits connected to its line side and trunk circuits and registers connected to its trunk side, a system controller, code leads interconnecting said line circuits with said registers and said controller, means for applying signals to said code leads from said controller to identify a calling one of said line circuits requesting service, means for transmitting signals identifying said calling line circuit from said line side code leads to any one of said registers, means for applying signals from said one register to said code leads for selecting a called one of said line circuits, means for selecting an idle one of said trunk circuits for use on said call, means for subsequently gating said calling line identification signals from said one register back onto sAid code leads to reidentify said calling line circuit, and means for applying said code lead signals to said network for controlling the establishment of network connections between said calling and called line circuits via said selected trunk circuit.

Claim 3

In a switching system, a switching network having line circuits connected to its line side and trunk circuits and registers connected to its trunk side, a line scanner and a trunk scanner, a set of line side code leads interconnecting said line circuits and said registers with said line scanner, a set of trunk side code leads interconnecting said trunk circuits and said registers with said trunk scanner, means responsive to the initiation of a call at a calling one of said line circuits for applying signals to said line side code leads from said line scanner to identify said calling line circuit, means responsive to said identification for transmitting signals identifying said calling line circuit from said line side code leads to any one of said registers, means for applying signals from said one register to said line side code leads for selecting a called one of said line circuits, means for applying signals from said trunk scanner to said trunk side code leads for selecting an idle one of said trunk circuits, means for subsequently applying said calling line identification signals from said register back onto said line side code leads to reidentify said calling line circuit, and means for applying said code lead signals to said network for controlling the establishment of a network connection between said calling and called line circuits via said one trunk circuit.

Claim 4

In a switching system, a switching network having line circuits connected to its line side and trunk circuits and registers connected to its trunk side, a line scanner and a trunk scanner, a set of line side code leads interconnecting said line circuits and said registers with said line scanner, a set of trunk side code leads interconnecting said trunk circuits and said registers with said trunk scanner, means responsive to the initiation of a call at a calling one of said line circuits for applying signals to said line side code leads from said line scanner to identify said calling line circuit, means responsive to said identification for transmitting signals identifying said calling line circuit from said line side code leads to any one of said registers, means for applying signals from said one register to said line side code leads for selecting a called one of said line circuits, means for applying signals from said trunk scanner to said trunk side code leads for selecting an idle one of said trunk circuits, means for subsequently applying said calling line identification signals from said register back onto said line side code leads to reidentify said calling line circuit, and means for applying said code lead signals to said network for controlling the establishment of a network connection between said calling and called line circuits via said one trunk circuit.

Claim 5

The system of claim 2 in combination with means responsive to said reidentification for generating calling line class information, means responsive to the generation of said class information for determining whether said calling line circuit is entitled to the class of service associated with said call, means responsive to a determination that said calling line circuit is not entitled to the class of service associated with said call for connecting said calling line circuit to a tone source to indicate that said call cannot be completed, and means responsive to a determination that that calling line circuit is entitled to the class of service associated with said call for enabling the further serving of said call by said system.

Claim 6

In a switching system, a switching network having line circuits connected to its line side and trunk circuits and registers connected to its trunk side, a line scanner and a trunk scanner, a set of line side code leads interconnecting said line circuits and said registers with said line scanner, a set of trunk side code leads interconnecting said trunk circuits and said registers with said trunk scanner, means responsive to the initiation of a call at a calling one of said line circuits for applying signals to said line side code leads from said line scanner to identify said calling line circuit, means responsive to said identification for applying signals from said trunk scanner to said trunk side code leads for selecting an idle one of said registers for use on said call, means for applying said code lead signals from both sets of said leads to said network, said network being responsive to said code lead signals for establishing a network path between said calling line circuit and said selected register, means further responsive to said identification of said calling line circuit for transmitting signals identifying said calling line circuit from said line side code leads to said one register, and means in said register for storing called line digits received over said path from said calling line circuit.

Claim 7

In a switching system, a switching network having line circuits connected to its line side and trunk circuits and registers connected to its trunk side, a line scanner and a trunk scanner, a set of line side code leads interconnecting said line circuits and said registers with said line scanner, a set of trunk side code leads interconnecting said trunk circuits and said registers with said trunk scanner, means responsive to the initiation of a call at a calling one of said line circuits for applying signals to said line side code leads from said line scanner to identify said calling line circuit, means responsive to said identification for applying signals from said trunk scanner to said trunk side code leads for selecting an idle one of said registers for use on said call, means for applying said code lead signals from both sets of said leads to said network, said network being responsive to said code lead signals for establishing a network path between said calling line circuit and said selected register, means further responsive to said identification of said calling line circuit for transmitting signals identifying said calling line circuit from said line side code leads to said one register, and means in said register for storing called line digits received over said path from said calling line circuit.

Claim 8

The system of claim 4 in combination with means for subsequently applying signals from said one register onto said line side code leads for selecting said called line circuit, means for applying signals from said trunk scanner to said trunk side code leads for selecting an idle one of said trunk circuits for use on sAid call, means for applying said calling line identification signals from said register back onto said line side code leads to reidentify said calling line circuit, means responsive to said reidentification for generating calling line class information, and means for applying said code lead signals from both sets of said leads to said network for controlling the establishment of a network connection between said calling and called line circuits via said one trunk circuit.

Claim 9

The system of claim 5 in combination with means responsive to the generation of said class information for determining whether said calling line circuit is entitled to the class of service associated with said call, means responsive to a determination that said calling line circuit is not entitled to the class of service associated with said call for connecting said calling line circuit to a tone source to indicate that said call cannot be completed, and means responsive to a determination that that calling line circuit is entitled to the class of service associated with said call for enabling the further serving of said call by said system.

Claim 10

The system of claim 4 in combination with means for subsequently applying signals from said one register onto said line side code leads for selecting said called line circuit, means responsive to said called line circuit selection for applying signals from said trunk scanner to said trunk side code leads for selecting an idle one of said trunk circuits for use on said call, means responsive to said trunk circuit selection for applying signals from said line side and trunk side code leads to said network, said network being responsive to said last named signals for establishing a network path from said called line circuit to said selected trunk circuit, means responsive to said connection to said trunk circuit for applying said calling line identification signals from said register back onto said line side code leads to reidentify said calling line circuit, means responsive to said reidentification for generating calling line class information, and means responsive to said class information for applying signals from said line side and trunk side code leads to said network for controlling the establishment of a network connection between said calling line circuit and said selected trunk circuit to which said called line circuit is currently connected.

Claim 11

The system of claim 7 in combination with means responsive to the generation of said class information for determining whether said calling line circuit is entitled to the class of service associated with said call, means responsive to a determination that said calling line circuit is not entitled to the class of service associated with said call for connecting said calling line circuit to a tone source to indicate that said call cannot be completed, and means responsive to a determination that that calling line circuit is entitled to the class of service associated with said call for enabling the further serving of said call by said system.

Claim 12

In a switching system, a switching network having line circuits connected to its line side and trunk circuits and registers connected to its trunk side, a line scanner, code leads interconnecting said line circuits and said registers with said line scanner, means responsive to the initiation of a call at a calling one of said line circuits for applying signals to said code leads from said line scanner to identify said calling line circuit, means responsive to said identification for transmitting signals identifying said calling line circuit from said code leads to an idle one of said registers, means in said one register for storing called line digits received from said calling line circuit, means for applying said called line digits from said one register to said code leads for selecting said called line circuits, means responsive to said called line circuit selection for selecting an idle one of said trunk circuits for use on said call, means for subsequently aPplying said calling line identification signals from said one register back onto said code leads to reidentify said calling line circuit, means responsive to said last named signals for generating calling line class information, and means responsive to said class information for applying said code lead signals to said network for controlling the establishment of a network connection between said calling and called line circuits via said one trunk circuit.

Claim 13

In a switching system, a switching network having line circuits connected to its line side and trunk circuits and registers connected to its trunk side, a line scanner, code leads interconnecting said line circuits and said registers with said line scanner, means responsive to the initiation of a call at a calling one of said line circuits for applying signals to said code leads from said line scanner to identify said calling line circuit, means responsive to said identification for transmitting signals identifying said calling line circuit from said code leads to an idle one of said registers, means in said one register for storing called line digits received from said calling line circuit, means for applying said called line digits from said one register to said code leads for selecting said called line circuits, means responsive to said called line circuit selection for selecting an idle one of said trunk circuits for use on said call, means for subsequently aPplying said calling line identification signals from said one register back onto said code leads to reidentify said calling line circuit, means responsive to said last named signals for generating calling line class information, and means responsive to said class information for applying said code lead signals to said network for controlling the establishment of a network connection between said calling and called line circuits via said one trunk circuit.

Claim 14

In a switching system, a switching network having line circuits connected to its line side and trunk circuits and registers connected to its trunk side, a line scanner, code leads interconnecting said line circuits and said registers with said line scanner, means responsive to the initiation of a call at a calling one of said line circuits for applying signals to said code leads from said line scanner to identify said calling line circuit, means responsive to said identification for transmitting signals identifying said calling line circuit from said code leads to an idle one of said registers, means for subsequently applying said calling line identification signals from said one register back onto said line side code leads to reidentify said calling line circuit, means responsive to said last named signals for generating calling line class information, and means responsive to the generation of said class information for determining whether said calling line circuit is entitled to the class of service associated with said call.

Claim 15

In a switching system, a switching network having line circuits connected to its line side and trunk circuits and registers connected to its trunk side, a line scanner, code leads interconnecting said line circuits and said registers with said line scanner, means responsive to the initiation of a call at a calling one of said line circuits for applying signals to said code leads from said line scanner to identify said calling line circuit, means responsive to said identification for transmitting signals identifying said calling line circuit from said code leads to an idle one of said registers, means for subsequently applying said calling line identification signals from said one register back onto said line side code leads to reidentify said calling line circuit, means responsive to said last named signals for generating calling line class information, and means responsive to the generation of said class information for determining whether said calling line circuit is entitled to the class of service associated with said call.

Claim 16

In a switching system, a switching network having line circuits connected to its line side and trunk circuits and registers connected to its trunk side, a line scanner and a trunk scanner, a network controller, a set of line side code leads interconnecting said line circuits and said registers and said controller with said line scanner, said line circuits being connected to said leads on a coded basis with each line circuit being connected to a unique combination of said leads, a set of trunk side code leads interconnecting said trunk circuits and said registers and said controller with said trunk scanner, said registers and trunk circuits being connected to said trunk side leads on a coded basis with each register and trunk circuit being connected to a unique combination of said trunk side code leads, means responsive to the initiation of a call at a calling one of said line circuits for applying signals to said line side code leads from said line scanner to identify said calling line circuit, means responsive to said identification for applying signals from said trunk scanner to said trunk side code leads for selecting an idle one of said registers for use on said call, means responsive to said register selection for applying said code lead signals from both sets of said leads to said network controller, said network controller being responsive to said code lead signals for establishing a network path between said calling line circuit and said selected register, means further responsive to said identification of said calling line circuit for transmitting signals identifying said calling line circuit from said line side code leads to said one register, and means in said register for storing called number information received over said network path from said calling line circuit.

Claim 17

In a switching system, a switching network having line circuits connected to its line side and trunk circuits and registers connected to its trunk side, a line scanner and a trunk scanner, a network controller, a set of line side code leads interconnecting said line circuits and said registers and said controller with said line scanner, said line circuits being connected to said leads on a coded basis with each line circuit being connected to a unique combination of said leads, a set of trunk side code leads interconnecting said trunk circuits and said registers and said controller with said trunk scanner, said registers and trunk circuits being connected to said trunk side leads on a coded basis with each register and trunk circuit being connected to a unique combination of said trunk side code leads, means responsive to the initiation of a call at a calling one of said line circuits for applying signals to said line side code leads from said line scanner to identify said calling line circuit, means responsive to said identification for applying signals from said trunk scanner to said trunk side code leads for selecting an idle one of said registers for use on said call, means responsive to said register selection for applying said code lead signals from both sets of said leads to said network controller, said network controller being responsive to said code lead signals for establishing a network path between said calling line circuit and said selected register, means further responsive to said identification of said calling line circuit for transmitting signals identifying said calling line circuit from said line side code leads to said one register, and means in said register for storing called number information received over said network path from said calling line circuit.

Claim 18

The system of claim 11 in which said means for applying signals to said line side code leads to identify said calling line circuit comprises means responsive to the initiation of said call for activating said line scanner to scan said line circuits by applying coded signals to said line side code leads and means responsive to the scanning of said calling line circuit for stopping said line scanner in its operative position unique to said calling line circuit.

Claim 19

The system of claim 12 in which said means for selecting an idle register comprises means responsive to the stopping of said line scanner for activating said trunk scanner to scan said registers by applying coded signals to said trunk side code leaDs, means responsive to the scanning of an idle one of said registers for selecting it for use on said call, and means responsive to said selection for stopping said trunk scanner in its operative position unique to said selected register.

Claim 20

The system of claim 11 in combination with means for subsequently applying signals from said one register onto said line side code leads for selecting a called one of said line circuits, means in said called line circuit for indicating whether it is currently busy or idle, means responsive to an idle indication for causing said trunk scanner to apply coded signals to trunk side code leads to select a first network appearance of an idle one of said trunk circuits, means responsive to said trunk circuit selection for applying signals from said line side and trunk side code leads to said network, said network being responsive to said last named signals for establishing a network path from said called line circuit to said first network appearance of said selected trunk circuit, means responsive to said connection to said trunk circuit for applying said calling line identification signals from said register onto said line side code leads to reidentify said calling line circuit, means responsive to said reidentification for generating calling line class information, means further responsive to said connection to advance said trunk scanner to a position in which it applies to said trunk side code leads signals unique to a second network appearance of said selected trunk circuit, and means responsive to said class information for applying signals from said line side and trunk side code leads to said network for controlling the establishment of a network connection between said calling line circuit and said second network appearance of said selected trunk circuit.

Claim 21

The system of claim 14 in combination with means responsive to the generation of said class information for determining whether said calling line circuit is entitled to the class of service associated with said call, means responsive to a determination that said calling line circuit is not entitled to the class of service associated with said call for connecting said calling line circuit to a tone source to indicate that said call cannot be completed, and means responsive to a determination that that calling line circuit is entitled to the class of service associated with said call for enabling the further serving of said call by said system.

Claim 22

The system of claim 11 in combination with means for determining the type of call represented by the called number information received by said one register from said calling line circuit, means responsive to a determination that said information represents a central office type call for applying said calling line identification signals from said register back onto said line code leads to reidentify said calling line circuit, means responsive to said reidentification for generating calling line class information indicating whether said calling line is permitted to initiate central office type calls, means responsive to an indication that said calling line is entitled to place central office type calls for causing said trunk scanner to apply coded signals to said trunk side code leads to select an idle one of said trunks that has connections extending to a central office, and means responsive to said trunk circuit selection for applying signals from said line side and trunk side code leads to said network, said network being responsive to said last named signals for establishing a path from said calling line circuit to said selected trunk circuit.

Claim 23

A switching system comprising a switching network having a plurality of line circuits connected to its line side and a plurality of trunk circuits and at least one register connected to its trunk side, said register including a calling number store and a called number store, a plurality of code leads connected to said line circuits, means for applying signals to said code leads, means coNnected to said network for storing a called number identification in said called number store, first means distinct from said network for applying a calling number identification from said code leads to said calling number store and for applying said calling number identification from said calling number store to said signal applying means, and second means distinct from said network, for applying said called number identification from said called number store to said code leads.

Claim 24

A switching system comprising a switching network having a plurality of line circuits connected to its line side and a plurality of trunk circuits and at least one register connected to its trunk side, said register including a calling number store and a called number store, a plurality of code leads connected to said line circuits, means for applying signals to said code leads, means coNnected to said network for storing a called number identification in said called number store, first means distinct from said network for applying a calling number identification from said code leads to said calling number store and for applying said calling number identification from said calling number store to said signal applying means, and second means distinct from said network, for applying said called number identification from said called number store to said code leads.

Claim 25

A switching system in accordance with claim 17 wherein said first means includes first leads connected to said calling number store, first gating means connecting said first leads to said code leads, and second gating means connecting said first leads to said signal applying means, and wherein said second means includes second leads connected to said called number store and third gating means connecting said second leads to said code leads.