Pbx automatic number identification system

Claim 2

In a switching system, a switching network having line circuits connected to its line side and trunk circuits connected to its trunk side, means for detecting the receipt from a calling one of said line circuits of a dialed prefix digit signifying a request for a network connection to one of said trunk circuits, first means responsive to said detection for identifying said calling line circuit and for supplying a signal identifying said line circuit to said network, second means responsive to said detection for selecting an idle one of said trunk circuits and for supplying a signal identifying said selected trunk circuit to said network, said network being responsive to the receipt of said identification signals from said first and second means for establishing a connection between said calling line circuit and said selected trunk circuit, and means for transmitting information from said first and second means to a central office identifying said calling line circuit and said selected trunk circuit.

Claim 3

The system of claim 1 in which said means for transmitting comprises automatic number identification equipment, means for transmitting information from said first and second means to said automatic number identification equipment identifying said calling line circuit and said selected trunk circuits, and means in said automatic number identification equipment responsive to the receipt of said information for transmitting said information to said central office.

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, said network being effective upon the initiation of a call at a calling one of said line circuits for connecting said calling line circuit to an idle one of said registers, means in said register for detecting the receipt from said calling line circuit of a prefix digit signifying a request for a network connection from said calling line circuit to one f said trunk circuits, first means responsive to said detection for identifying said calling line circuit and for supplying a signal identifying said line circuit to said network, second means responsive to said detection for selecting an idle one of said trunk circuits and for supplying a signal identifying said selected trunk circuit to said network, said network being responsive to the receipt of said identification signals from said first and second means for establishing a connection between said calling line circuit and said selected trunk circuit, and means for transmitting information from said first and second means to a central office identifying said calling line circuit and said selected trunk circuit.

Claim 5

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, said network being effective upon the initiation of a call at a calling one of said line circuits for connecting said calling line circuit to an idle one of said registers, means in said register for detecting the receipt from said calling line circuit of a prefix digit signifying a request for a network connection from said calling line circuit to one f said trunk circuits, first means responsive to said detection for identifying said calling line circuit and for supplying a signal identifying said line circuit to said network, second means responsive to said detection for selecting an idle one of said trunk circuits and for supplying a signal identifying said selected trunk circuit to said network, said network being responsive to the receipt of said identification signals from said first and second means for establishing a connection between said calling line circuit and said selected trunk circuit, and means for transmitting information from said first and second means to a central office identifying said calling line circuit and said selected trunk circuit.

Claim 6

The system of claim 3 in which said means for transmitting comprises automatic number identification equipment, means for transmitting information from said first and second means to said automatic number identification equipment identifying said calling line circuit and said selected trunk circuits, and means in said automatic number identification equipment responsive to the receipt of said information for transmitting said information to said central office.

Claim 7

The system of claim 4 in combination with third means responsive to said detection for determining whether said automatic number identification equipment is currently idle or busy, means responsive to a determination that said automatic number identification equipment is busy for delaying the operation of said first and second means in its serving of said call for a predetermined time interval, said third means being effective after the end of said interval for determining the current idle or busy state of said automatic number identification equipment, and means responsive to a determination after the end of said interval that said automatic number identification equipment is idle for enabling the operation of said first and second means.

Claim 8

The system of claim 5 in combination with means for continuing the serving of calls while said automatic number identification equipment is in a busy state due to an equipment malfunction comprising, means for normally returning said automatic number identification equipment to an idle state after said information for a call is transmitted to said central office, and means effective upon the failure of said last named means and after a predetermined time delay for returning said automatic number identification equipment to an idle state.

Claim 9

In a switching system, a switching network having a plurality of line circuits connected to its line side and a plurality of central office trunk circuits and a plurality of registers connected to its trunk side, said network being effective upon the initiation of a call from a calling one of said line circuits for connecting said calling line circuit to an idle one of said registers, means in said register for detecting the receipt from said calling line circuit of a dialed prefix digit signifying a request for a network connection from said line circuit to an idle one of said trunk circuits, means including a line scanner responsive to said detection for scanning said line circuits to identify said calling line circuit and for supplying a signal identifying said line circuit to said network, means including a trunk scanner responsive to said detection for scanning said trunk circuits to select an idle one of said trunk circuits and for supplying a signal identifying said selected trunk circuit to said network, said network being responsive to the receipt of said identification signals from said scanners for establishing a connection between said calling line circuit and said selected trunk circuit, automatic number identification equipment, means for transmitting information from said scanners to said automatic number identification equipment identifying said calling line circuit and said selected trunk circuit, and means in said automatic number identification equipment responsive to the receipt of said information for transmitting said information to said central office.

Claim 10

In a switching system, a switching network having a plurality of line circuits connected to its line side and a plurality of central office trunk circuits and a plurality of registers connected to its trunk side, said network being effective upon the initiation of a call from a calling one of said line circuits for connecting said calling line circuit to an idle one of said registers, means in said register for detecting the receipt from said calling line circuit of a dialed prefix digit signifying a request for a network connection from said line circuit to an idle one of said trunk circuits, means including a line scanner responsive to said detection for scanning said line circuits to identify said calling line circuit and for supplying a signal identifying said line circuit to said network, means including a trunk scanner responsive to said detection for scanning said trunk circuits to select an idle one of said trunk circuits and for supplying a signal identifying said selected trunk circuit to said network, said network being responsive to the receipt of said identification signals from said scanners for establishing a connection between said calling line circuit and said selected trunk circuit, automatic number identification equipment, means for transmitting information from said scanners to said automatic number identification equipment identifying said calling line circuit and said selected trunk circuit, and means in said automatic number identification equipment responsive to the receipt of said information for transmitting said information to said central office.

Claim 11

The system of claim 7 in combination with third means responsive to said detection for determining whether said automatic number identification equipment is currently idle or busy, means responsive to a determination that said automatic number identification equipment is busy for delaying the operation of said first and second means in its serving of said call for a predetermined time interval, said third means being effective after the end of said interval for determining the current idle or busy state of said automatic number identification equipment, and means responsive to a determination after the end of said interval that said automatic number identification equipment is idle for enabling the operation of said first and second means.

Claim 12

The system of claim 8 in combination with means for continuing the serving of calls while said automatic number identification equipment is in a busy state due to an equipment malfunction comprising, means for normally returning said automatic number identification equipment to an idle state after said information for a call is transmitted to said central office, and means effective upon the failure of said last named means and after a predetermined time delay for returning said automatic number identification equipment to an idle state.

Claim 13

In a switching system, a switching network having line circuits connected to its line side and central office trunk circuits and registers connected to its trunk side, said network being effective upon the initiation of a call from a calling one of said line circuits for connecting said calling line circuit to an idle one of said registers, a system controller, means in said register for registering a dialed prefix digit received from said calling line circuit and signifying a request for a network connection from said line circuit to an idle one of said trunk circuits, means in said register fOr transmitting a signal representing said digit to said controller, means in said controller for detecting the receipt of said signal, means including a line scanner responsive to said detection for scanning said line circuits to identify said calling line circuit and for supplying a signal identifying said line circuit to said network, means including a trunk scanner responsive to said detection for scanning said trunk circuits to select an idle one of said trunk circuits and for supplying a signal identifying said selected trunk circuit to said network, said network being responsive to the receipt of said indentification signals from said scanners for establishing a connection between said calling line circuit and said selected trunk circuit under control of both of said scanners, automatic number identification equipment, means for transmitting information from said scanners to said automatic number identification equipment identifying said calling line circuit and said selected trunk circuit, and means in said automatic number identification equipment responsive to the receipt of said information for transmitting said information to said central office.

Claim 14

In a switching system, a switching network having line circuits connected to its line side and central office trunk circuits and registers connected to its trunk side, said network being effective upon the initiation of a call from a calling one of said line circuits for connecting said calling line circuit to an idle one of said registers, a system controller, means in said register for registering a dialed prefix digit received from said calling line circuit and signifying a request for a network connection from said line circuit to an idle one of said trunk circuits, means in said register fOr transmitting a signal representing said digit to said controller, means in said controller for detecting the receipt of said signal, means including a line scanner responsive to said detection for scanning said line circuits to identify said calling line circuit and for supplying a signal identifying said line circuit to said network, means including a trunk scanner responsive to said detection for scanning said trunk circuits to select an idle one of said trunk circuits and for supplying a signal identifying said selected trunk circuit to said network, said network being responsive to the receipt of said indentification signals from said scanners for establishing a connection between said calling line circuit and said selected trunk circuit under control of both of said scanners, automatic number identification equipment, means for transmitting information from said scanners to said automatic number identification equipment identifying said calling line circuit and said selected trunk circuit, and means in said automatic number identification equipment responsive to the receipt of said information for transmitting said information to said central office.

Claim 15

The system of claim 10 in combination with third means responsive to said detection of the receipt of said digit by said controller for determining whether said automatic number identification equipment is currently idle or busy, means responsive to a determination that said automatic number identification equipment is busy for aborting the operation f said first and second means and for causing said register to delay the serving of said call for a predetermined time interval by terminating the transmission of said digit signal to said controller, means effective at the end of said interval for again transmitting a signal representing said digit from said register to said controller, and means responsive to a subsequent determination that said automatic number identification equipment is idle for enabling the operation of said first and second means.

Claim 16

The system of claim 11 in combination with means for continuing the serving of calls while said automatic number identification equipment is in a busy state due to an equipment malfunction comprising, means for normally returning said automatic number identification equipment to an idle state after said information is transmitted to said central office, and means effective upon the failure of said last named means and after a predetermined time delay for returning said automatic number identification equipment to an idle state.

Claim 17

In a switching system, an end marked switching network having line circuits connected to its line side and central office trunk circuits and registers connected to its trunk side, said network being effective upon the initiation of a call from a calling one of said line circuits for connecting said calling line circuit to an idle one of said registers, a system controller, means in said register for registering a dialed prefix digit receiving from said calling line circuit and signifying a request for a network connection from said line circuit to an idle one of said trunk circuits, means for transmitting a signal representing said digit from said register to said controller, means in said controller for detecting the receipt of said signal, means including a line scanner responsive to the receipt of said digit by said controller for scanning said line circuits to identify said calling line circuit, means including a trunk scanner responsive to the receipt of said digit by said controller for scanning said trunk circuits to select an idle one of said trunk circuits, means responsive to said identification and to said selection for applying marking potentials to the network appearances of said calling line circuit and said selected trunk circuit, said network being responsive to said potentials to establish a connection between said calling line circuit and said selected trunk circuit, automatic number identification equipment, meaNs for transmitting information from said scanners to said automatic number identification equipment identifying said calling line circuit and said selected trunk circuit, and means in said automatic number identification equipment responsive to the receipt of said information for transmitting said information to said central office.

Claim 18

In a switching system, an end marked switching network having line circuits connected to its line side and central office trunk circuits and registers connected to its trunk side, said network being effective upon the initiation of a call from a calling one of said line circuits for connecting said calling line circuit to an idle one of said registers, a system controller, means in said register for registering a dialed prefix digit receiving from said calling line circuit and signifying a request for a network connection from said line circuit to an idle one of said trunk circuits, means for transmitting a signal representing said digit from said register to said controller, means in said controller for detecting the receipt of said signal, means including a line scanner responsive to the receipt of said digit by said controller for scanning said line circuits to identify said calling line circuit, means including a trunk scanner responsive to the receipt of said digit by said controller for scanning said trunk circuits to select an idle one of said trunk circuits, means responsive to said identification and to said selection for applying marking potentials to the network appearances of said calling line circuit and said selected trunk circuit, said network being responsive to said potentials to establish a connection between said calling line circuit and said selected trunk circuit, automatic number identification equipment, meaNs for transmitting information from said scanners to said automatic number identification equipment identifying said calling line circuit and said selected trunk circuit, and means in said automatic number identification equipment responsive to the receipt of said information for transmitting said information to said central office.

Claim 19

The system of claim 13 in combination with third means responsive to said detection of the receipt of said digit by said controller for determining whether said automatic number identification equipment is currently idle or busy, means responsive to a determination that said automatic number identification equipment is busy for aborting the operation of said first and second means and for causing said register to delay the serving of said call for a predetermined time interval by terminating the transmission of said digit signal to said controller, means effective at the end of said interval for again transmitting a signal representing said digit from said register to said controller, and means responsive to a subsequent determination that said automatic number identification equipment is idle for enabling the operation of said first and second means.

Claim 20

The system of claim 14 in combination with means for continuing the serving of calls while said automatic number identification equipment is in a busy state due to an equipment malfunction comprising, means for normally returning said automatic number identification equipment to an idle state after said information is transmitted to said central office, and means effective upon the failure of said last named means and after a predetermined time delay for returning said automatic number identification equipment to an idle state.

Claim 21

In a switching system, an end marked type of switching network having line circuits connected to its line side and central office trunk circuits and registers connected to its trunk side, said network being effective upon the initiation of a call from a calling one of said line circuits for connecting said calling line circuit to an idle one of said registers, a system controller, means in said register for registering a dialed prefix digit received from said calling line circuit and signifying a request for a network connection from said line circuit to an idle one of said trunk circuits, means for transmitting a signal representing said digit from said register to said controller, means in said controller for detecting the receipt of said signal, a line scanner having output conductors extending to said line circuits, said line scanner being responsive to the receipt of said signal by said controller for applying scanning potentials to its output conductors to identify said calling line circuit, a trunk scanner having output conductors extending to said trunk circuits, said trunk scanner being responsive to the receipt of said signal by said controller for applying scanning potentials to its output conductors to select an idle one of said trunk circuits, means responsive to said identification and to said selection for applying marking potentials to the network appearances of said calling line circuit and said selected trunk circuit, said network being responsive to said marking potentials to establish a connection between said calling line circuit and said selected trunk circuit, automatic number identification equipment, means connecting said output conductors of said scanner with automatic number identification equipment for transmitting information from said scanners to said equipment identifying said calling line circuit and said selected trunk circuit, and means in said automatic number identification equipment responsive to the receipt of said information for transmitting said information to said central office.

Claim 22

In a switching system, an end marked type of switching network having line circuits connected to its line side and central office trunk circuits and registers connected to its trunk side, said network being effective upon the initiation of a call from a calling one of said line circuits for connecting said calling line circuit to an idle one of said registers, a system controller, means in said register for registering a dialed prefix digit received from said calling line circuit and signifying a request for a network connection from said line circuit to an idle one of said trunk circuits, means for transmitting a signal representing said digit from said register to said controller, means in said controller for detecting the receipt of said signal, a line scanner having output conductors extending to said line circuits, said line scanner being responsive to the receipt of said signal by said controller for applying scanning potentials to its output conductors to identify said calling line circuit, a trunk scanner having output conductors extending to said trunk circuits, said trunk scanner being responsive to the receipt of said signal by said controller for applying scanning potentials to its output conductors to select an idle one of said trunk circuits, means responsive to said identification and to said selection for applying marking potentials to the network appearances of said calling line circuit and said selected trunk circuit, said network being responsive to said marking potentials to establish a connection between said calling line circuit and said selected trunk circuit, automatic number identification equipment, means connecting said output conductors of said scanner with automatic number identification equipment for transmitting information from said scanners to said equipment identifying said calling line circuit and said selected trunk circuit, and means in said automatic number identification equipment responsive to the receipt of said information for transmitting said information to said central office.

Claim 23

In a switching system, a switching network having a plurality of line circuits connected to its line side and a plurality of central office trunk circuits and a plurality of registers connected to its trunk side, said network being effecTive upon the initiation of a call from a calling one of said line circuits for connecting said calling line circuit to an idle one of said registers, means in said register for detecting the receipt from said calling line circuit of a dialed prefix digit signifying a request for a network connection from said line circuit to an idle one of said trunk circuits, a line scanner having output conductors extending to said line circuits, said line scanner being responsive to said detection for applying scanning signals to its output conductors to identify said calling line circuit and for supplying a signal identifying said line circuit to said network, a trunk scanner having output conductors extending to said trunk circuits, said trunk scanner being responsive to said detection for applying scanning signals to its output conductors to select an idle on eof said trunk circuits and for supplying a signal identifying said selected trunk circuit to said network, said network being responsive to the receipt of said identification signals from said scanners for establishing a connection between said calling line circuit and said selected trunk circuit under control of both of said scanners, automatic number identification equipment, means connecting said output conductors of said scanners with said automatic number identification equipment, for transmitting information from said scanners over said output conductors to said equipment identifying said calling line circuit and said selected trunk circuit, and means in said automatic number identification equipment responsive to the receipt of said information for transmitting said information to said central office.

Claim 24

In a switching system, a switching network having a plurality of line circuits connected to its line side and a plurality of central office trunk circuits and a plurality of registers connected to its trunk side, said network being effecTive upon the initiation of a call from a calling one of said line circuits for connecting said calling line circuit to an idle one of said registers, means in said register for detecting the receipt from said calling line circuit of a dialed prefix digit signifying a request for a network connection from said line circuit to an idle one of said trunk circuits, a line scanner having output conductors extending to said line circuits, said line scanner being responsive to said detection for applying scanning signals to its output conductors to identify said calling line circuit and for supplying a signal identifying said line circuit to said network, a trunk scanner having output conductors extending to said trunk circuits, said trunk scanner being responsive to said detection for applying scanning signals to its output conductors to select an idle on eof said trunk circuits and for supplying a signal identifying said selected trunk circuit to said network, said network being responsive to the receipt of said identification signals from said scanners for establishing a connection between said calling line circuit and said selected trunk circuit under control of both of said scanners, automatic number identification equipment, means connecting said output conductors of said scanners with said automatic number identification equipment, for transmitting information from said scanners over said output conductors to said equipment identifying said calling line circuit and said selected trunk circuit, and means in said automatic number identification equipment responsive to the receipt of said information for transmitting said information to said central office.