US3573389A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Switching system with individual register control
Assignee: AT&T Inc
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Filing: 1968-12-18
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Granted: 1971-04-06
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Expires: 1988-12-18
Abstract
Abstract Special services, such as call transfer and abbreviated dialing, are provided by auxiliary circuits each uniquely associated with certain subscriber lines in a common control-switching system. The auxiliary circuit is arranged with shift registers to recognize the dialing of a predetermined code and to respond thereto by releasing and reenabling the common control switching equipment. On abbreviated dialing calls, the return of dial tone by the reenabled central office register enables the auxiliary circuit to outpulse the directory number of the desired station. On transfer calls, after dialing the access code, the subscriber primes the transfer feature by dialing the directory number of the transfer station. This number is then simultaneously stored in the auxiliary circuit and in the reenabled central office register. In either situation the call then progresses to completion in the normal manner.
Inventors
- 👤 Martin R Greenstein
- 👤 Alfred Zarouni
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:14
CPC Classifications
H; H04; H04Q; H04Q3/00; H04Q3/42; H04Q3/54; H04M; H04M1/00; H04M1/66; H04M1/677
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
92 words
In a communication switching system: a plurality of stations each comprising means for transmitting signals; first and second register means for concurrently receiving transmitted signals; means responsive to an off-hook condition of one of said stations for seizing said first register means; means responsive to the transmission of said signals for enabling said second register means to receive said transmitted signals; and means in said second register means responsive to receipt of a certain combination of said signals for releasing said seized first register means and for reseizing said first register means.
Claim 2
Dependent Claim
92 words
In a communication switching system: a plurality of stations each comprising means for transmitting signals; first and second register means for concurrently receiving transmitted signals; means responsive to an off-hook condition of one of said stations for seizing said first register means; means responsive to the transmission of said signals for enabling said second register means to receive said transmitted signals; and means in said second register means responsive to receipt of a certain combination of said signals for releasing said seized first register means and for reseizing said first register means.
Claim 3
Dependent Claim
25 words
The invention as described in claim 1 wherein said second register means further comprises means responsive to said reseizing first register means for transmitting signals.
Claim 4
Dependent Claim
111 words
In a communication switching system a plurality of subscriber stations each comprising: means for selectively transmitting signals; first register means at said switching network available to all said stations for receiving transmitted signals; a plurality of second register means each uniquely associated with certain of said stations for receiving transmitted signals; means responsive to the off-hook state of any of said certain stations for seizing said first register means and for enabling said second register means to receive transmitted signals; and means in said second register means responsive to receipt of a certain combination of said signals for releasing said seized first register means and for reseizing said first register means.
Claim 5
Dependent Claim
111 words
In a communication switching system a plurality of subscriber stations each comprising: means for selectively transmitting signals; first register means at said switching network available to all said stations for receiving transmitted signals; a plurality of second register means each uniquely associated with certain of said stations for receiving transmitted signals; means responsive to the off-hook state of any of said certain stations for seizing said first register means and for enabling said second register means to receive transmitted signals; and means in said second register means responsive to receipt of a certain combination of said signals for releasing said seized first register means and for reseizing said first register means.
Claim 6
Dependent Claim
32 words
The invention as set forth in claim 3 wherein said second register means further comprises means responsive to said reseizing first register means for transmittinG thereto a predetermined combination of said signals.
Claim 7
Dependent Claim
39 words
The invention as set forth in claim 3 wherein said second register means further comprises means for storing a plurality of predetermined signal combinations and means for selectively enabling the transmission of any one of said stored signal combinations.
Claim 8
Dependent Claim
114 words
In a telephone switching system having a plurality of calling and called stations: switching network means; a plurality of lines extending from said network; a plurality of stations connected to said lines; control means for establishing connections through said network; a common control register in said control network seized in response to an off-hook condition of said stations for receiving connection completing information from said stations; and an arrangement for providing special services on certain of said lines comprising auxiliary circuit means individually associated with said certain lines for detecting the transmission of predetermined information over said associated line and means responsive to said detected transmission for releasing and reseizing said common control register.
Claim 9
Dependent Claim
114 words
In a telephone switching system having a plurality of calling and called stations: switching network means; a plurality of lines extending from said network; a plurality of stations connected to said lines; control means for establishing connections through said network; a common control register in said control network seized in response to an off-hook condition of said stations for receiving connection completing information from said stations; and an arrangement for providing special services on certain of said lines comprising auxiliary circuit means individually associated with said certain lines for detecting the transmission of predetermined information over said associated line and means responsive to said detected transmission for releasing and reseizing said common control register.
Claim 10
Dependent Claim
40 words
The invention as set forth in claim 6 wherein additional information is transmitted over said associated line in response to said reseized common control register and wherein said auxiliary circuit means is further arranged for storing said transmitted additional information.
Claim 11
Dependent Claim
62 words
The invention as set forth in claim 7 wherein said auxiliary circuit signal further comprises: means for detecting the establishment of connections to said associated line; means responsive to the enabling of said connection detecting means for seizing a common control register; and means in said auxiliary circuit responsive to said enabled common control register for transmitting thereto said stored additional information.
Claim 12
Dependent Claim
30 words
The invention as set forth in claim 6 wherein said auxiliary circuit means further comprises means responsive to said reseized common control register for transmitting thereto predetermined connection completing information.
Claim 13
Dependent Claim
121 words
An auxiliary circuit for providing a special service feature in a communication switching system having a plurality of uniquely designated stations, and register means operable to receive unique designations from any seized one of said stations and for enabling connections from a seized one of said stations to a station associated with received ones of said unique designations, wherein said auxiliary circuit comprises: a plurality of storage register, each containing a unique designation of one of said stations; means responsive to receipt of a predetermined code for selecting one of said storage registers and for releasing and reseizing said register means; and means responsive to said reseized register means for transmitting thereto the unique designation contained in said selected storage register.
Claim 14
Dependent Claim
121 words
An auxiliary circuit for providing a special service feature in a communication switching system having a plurality of uniquely designated stations, and register means operable to receive unique designations from any seized one of said stations and for enabling connections from a seized one of said stations to a station associated with received ones of said unique designations, wherein said auxiliary circuit comprises: a plurality of storage register, each containing a unique designation of one of said stations; means responsive to receipt of a predetermined code for selecting one of said storage registers and for releasing and reseizing said register means; and means responsive to said reseized register means for transmitting thereto the unique designation contained in said selected storage register.
Claim 15
Dependent Claim
33 words
The invention as set forth in claim 10 wherein said unique designations contained in each of said storage means are selectively controllable by a said station exclusively associated with each said auxiliary circuit.
Claim 16
Dependent Claim
85 words
The invention set forth in claim 10 wherein said unique designations consist of a set of digits, said storage registers comprise shift register circuits operable to serially record received ones of said digits from a said station associated with said auxiliary circuit, digit comparator means operable to detect a match between a predetermined set of digits and a received set of digits and means responsive to a said detected match for selectively enabling the serial recording of digits in one of said shift register circuits.
Claim 17
Dependent Claim
114 words
An auxiliary circuit for connection in a telephone system having a plurality of stations for transmitting call directing signals and having originating register means for receiving said signals, said circuit comprising: auxiliary register means for storing predetermined call directing information call direCting signaling means; detecting means for detecting the transmittal of at least one predetermined call directing signal; means responsive to said detecting means for causing release of said originating register means; means for causing a reseizure of said originating register means; and means responsive to said reseizure of said originating register means for causing said auxiliary register means to operate said call directing signaling means in accordance with said stored call directing information.
Claim 18
Dependent Claim
114 words
An auxiliary circuit for connection in a telephone system having a plurality of stations for transmitting call directing signals and having originating register means for receiving said signals, said circuit comprising: auxiliary register means for storing predetermined call directing information call direCting signaling means; detecting means for detecting the transmittal of at least one predetermined call directing signal; means responsive to said detecting means for causing release of said originating register means; means for causing a reseizure of said originating register means; and means responsive to said reseizure of said originating register means for causing said auxiliary register means to operate said call directing signaling means in accordance with said stored call directing information.
Claim 19
Dependent Claim
25 words
An auxiliary circuit in accordance with claim 13 wherein said means responsive to said reseizure of said originating register means includes dial tone detecting means.
Claim 20
Dependent Claim
40 words
An auxiliary circuit in accordance with claim 13 wherein said auxiliary circuit includes output means operable for seizing said originating register means, ringing tone detector means and means responsive to said ringing tone detector means for enabling said output means.
Claim 21
Dependent Claim
46 words
An auxiliary circuit in accordance with claim 15 further comprising dial tone detector means operable to detect seizure of said originating register via said enabled output means and means responsive to said detected seizure for enabling said auxiliary register means in accordance with said call-directing information.
Claim 22
Dependent Claim
30 words
An auxiliary circuit in accordance with claim 16 further comprising means responsive to said auxiliary register means for establishing a communication connection between said first and said second output means.
Claim 23
Dependent Claim
28 words
An auxiliary circuit in accordance with claim 14 wherein said auxiliary circuit includes a single output means and said signaling means includes means bridged across said output means.
Claim 24
Dependent Claim
35 words
An auxiliary circuit in accordance with claim 18 wherein said auxiliary register means includes a plurality of shift registers and said detecting means detects distinct call directing signals individual to each of said shift registers.
References Cited (Backward Citations)
US3206554A
Cited
US3334190A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-04-05 | 1974-10-05 | 1975-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-05 | 1978-10-05 | 1979-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-05 | 1982-10-05 | 1983-04-06 | $7700.00 | Window Closed / Lapsed |