US3766324A — Auxiliary switching system controlled by regular …

Claim 1

Independent Claim 103 words

In combination with a switching system for establishing a first electrical path between any two stations in a plurality of stations, an auxiliary switching system for establishing a second electrical path therebetween comprising: circuit means for identifying the two stations to be interconnected via the second electrical path after the establishment of the first electrical path, said identification being enabled by mark signals generated by said auxiliary switching system in response to signals translated via the first electrical path through said other switching system, and switching means responsive to said mark signals for establishing the second electrical path between the two identified stations.

Claim 2

Dependent Claim 103 words

In combination with a switching system for establishing a first electrical path between any two stations in a plurality of stations, an auxiliary switching system for establishing a second electrical path therebetween comprising: circuit means for identifying the two stations to be interconnected via the second electrical path after the establishment of the first electrical path, said identification being enabled by mark signals generated by said auxiliary switching system in response to signals translated via the first electrical path through said other switching system, and switching means responsive to said mark signals for establishing the second electrical path between the two identified stations.

Claim 3

Dependent Claim 98 words

In combination with a telephone switching system for establishing an audio path between any two stations in a plurality of stations, an auxiliary switching system for establishing an auxiliary path therebetween comprising: circuit means for identifying the two stations to be interconnected via the auxiliary path after the establishment of the audio path, said identification being mAde through mark signals generated by said auxiliary switching system in response to signals translated over the audio path through the telephone switching system, and switching means responsive to said mark signals for establishing the auxiliary path between the two identified stations.

Claim 4

Dependent Claim 98 words

In combination with a telephone switching system for establishing an audio path between any two stations in a plurality of stations, an auxiliary switching system for establishing an auxiliary path therebetween comprising: circuit means for identifying the two stations to be interconnected via the auxiliary path after the establishment of the audio path, said identification being mAde through mark signals generated by said auxiliary switching system in response to signals translated over the audio path through the telephone switching system, and switching means responsive to said mark signals for establishing the auxiliary path between the two identified stations.

Claim 5

Dependent Claim 77 words

The auxiliary switching system of claim 2 wherein said circuit means includes a plurality of identifying circuits corresponding in number to said plurality of stations, each of said identifying circuits being associated with a different one of said stations connected so that whenever two stations are to be interconnected via said auxiliary path, the two identifying circuits associated therewith generate said mark signals in response to signals received over said audio path via said telephone switching system.

Claim 6

Dependent Claim 149 words

In combination with a telephone switching system for establishing an audio path between any two stations in a plurality of stations wherein each of said plurality of stations is connected to said telephone switching system through a separate line circuit, an auxiliary switching system for establishing an auxiliary path therebetween comprising: a switching matrix; individual circuit means separately connecting each of said plurality of stations to said switching matrix; circuit means connected to the line circuits and said switching matrix for applying mark signals to said matrix to identify the two stations to be interconnected via the auxiliary path in response to signals translated over the audio path through the telephone switching system via the line circuits of said two stations, and matrix scanning means connected to said circuit means and said switching matrix for selecting a free path through said switching matrix to interconnect said two identified stations.

Claim 7

Dependent Claim 149 words

In combination with a telephone switching system for establishing an audio path between any two stations in a plurality of stations wherein each of said plurality of stations is connected to said telephone switching system through a separate line circuit, an auxiliary switching system for establishing an auxiliary path therebetween comprising: a switching matrix; individual circuit means separately connecting each of said plurality of stations to said switching matrix; circuit means connected to the line circuits and said switching matrix for applying mark signals to said matrix to identify the two stations to be interconnected via the auxiliary path in response to signals translated over the audio path through the telephone switching system via the line circuits of said two stations, and matrix scanning means connected to said circuit means and said switching matrix for selecting a free path through said switching matrix to interconnect said two identified stations.

Claim 8

Dependent Claim 61 words

The auxiliary switching system of claim 4 wherein said circuit means includes: a plurality of identifying circuits corresponding in number to said individual line circuits, each of said identifying circuits being connected to a different one of said line circuits so that the two line circuits of said two stations to be interconnected apply enabling signals to their respective identifying circuits.

Claim 9

Dependent Claim 75 words

The auxiliary switching system of claim 5 wherein said circuit means includes: a scanning circuit which locates the identifying circuit of a first one of said two stations through a request signal generated in said identifying circuit in response to the application thereto of an audio ringing signal and a signal indicating the completion of the audio path, said signals being translated over the audio path via the line circuit connected to said identifying circuit.

Claim 10

Dependent Claim 62 words

The auxiliary switching system of claim 6 wherein: the identifying circuit of said first station applies said mark signal to said switching matrix in response to said request signal in conjunction with a mark enable signal generated by said scanning circuit and applied to all the identifying circuits simultaneously by said scanning circuit upon locating the identifying circuit of said first station.

Claim 11

Dependent Claim 82 words

The auxiliary switching system of claim 7 wherein said circuit means includes: a tone generator which is enabled by the cooperation of said request and mark enable signals to transmit a tone signal through the identifying circuit of said first station via the audio path to the identifying circuit of the second station so that the identifying circuit of said second station applies said mark signal to said switching matrix in response to said tone signal cooperating with said mark enable signal.

Claim 12

Dependent Claim 48 words

The auxiliary switching system of claim 8 wherein: said matrix scanning means is enabled by said mark enable signal to apply a scan signal to said switching matrix which cooperates with said two mark signals to interconnect said two stations via a free path in said switching matrix.

Claim 13

Dependent Claim 50 words

The auxiliary switching system of claim 9 wherein: said two identifying circuits apply hold signAls to said switching matrix for maintaining the auxiliary path between the two interconnected stations throughout the duration of the call in response to said enabling signals and a sleeve signal generated by said scanning circuit.

Claim 14

Dependent Claim 65 words

The auxiliary switching system of claim 4 wherein: each of said individual circuit means includes: a transmit pair and a receive pair of conductors, and switching means connected in series with said transmit and receive pair of conductors responsive to signals from said circuit means to connect the transmit pair of conductors from one station to the receive pair of conductors from the other station.

Claim 15

Dependent Claim 33 words

The auxiliary switching system of claim 11 wherein each of said individual circuit means includes: amplifying circuit means connected in series with at least one of said pairs of transmit and receive conductors.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1976-10-15	1977-04-16	1977-10-16	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1980-10-15	1981-04-16	1981-10-16	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1984-10-15	1985-04-16	1985-10-16	$7700.00	Window Closed / Lapsed

Auxiliary switching system controlled by regular telephone switching system

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