US3742155A
Expired / Lapsed
US
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Call source verification arrangement
Assignee: SPINKS
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Filing: 1972-02-01
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Granted: 1973-06-26
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Expires: 1992-02-01
Abstract
Abstract An arrangement is disclosed for verifying that requests for a loop-around type test connection between two calling stations have originated from appropriate stations which are physically at the same location. Location verifying signals resulting from a series of one syllable words being spoken simultaneously into transducer elements of both calling stations are sensed and counted by a test circuit at the point of requested loop-around connection. Reception of a specified number of substantially simultaneous signals from both stations within a measured time period initiates establishment of the requested connection.
Inventors
- 👤 R Buck
- 👤 J Deltuvia
- 👤 A Spinks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:35
CPC Classifications
H; H04; H04B; H04B3/00; H04B3/02; H04B3/46
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
59 words
In a communication system, a first communication channel, a second communication channel, connecting means operative to interconnect said first and second channels, detecting means for detecting only an occurrence of the same predetermined sequence of input signals on both said first and second channels, and enabling means controlled by said detecting means for enabling operation of said connecting means.
Claim 2
Dependent Claim
59 words
In a communication system, a first communication channel, a second communication channel, connecting means operative to interconnect said first and second channels, detecting means for detecting only an occurrence of the same predetermined sequence of input signals on both said first and second channels, and enabling means controlled by said detecting means for enabling operation of said connecting means.
Claim 3
Dependent Claim
35 words
In a communication system, the combination of claim 1 further comprising means for controlling said detecting means to detect said predetermined sequence pulses only when said occurrence thereof is substantially simultaneous on both said channels.
Claim 4
Dependent Claim
86 words
In a communication system, a first communication channel, a second communication channel, connecting means operative to interconnect said first and second channels, detecting means comprising first counting means for counting the number of occurrences of substantially simultaneous input signals on both of said channels, and enabling means controlled by said first counting means for enabling operation of said connecting means only after a first predetermined number of said occurrences of substantially simultaneous input signals on both said channels has been counted by said first counting means.
Claim 5
Dependent Claim
86 words
In a communication system, a first communication channel, a second communication channel, connecting means operative to interconnect said first and second channels, detecting means comprising first counting means for counting the number of occurrences of substantially simultaneous input signals on both of said channels, and enabling means controlled by said first counting means for enabling operation of said connecting means only after a first predetermined number of said occurrences of substantially simultaneous input signals on both said channels has been counted by said first counting means.
Claim 6
Dependent Claim
91 words
In a communication system, the combination of claim 3 wherein said detecting means further comprises second counting means for counting the number of input signals on either of said channels, each occurrence of substantially simultaneous input signals on both said channels being counted as a single input signal by said second counting means, and second inhibiting means controlled by said second counting means for inhibiting said first counting means when the number of said input signals on either of said channels counted by said seconD counting means exceeds a predetermined limit.
Claim 7
Dependent Claim
54 words
In a communication system, the combination of claim 4 further comprising first timing means for measuring a first predetermined time interval following a start signal associated with one of said channels, and first inhibiting means controlled by said first timing means for inhibiting said enabling means upon expiration of said first predetermined time interval.
Claim 8
Dependent Claim
72 words
In a communication system, the combination of claim 5 further comprising second timing means for measuring a second predetermined time interval following said start signal, said second predetermined time interval being shorter than said first predetermined time interval, and said first counting means being controlled by said second timing means to start counting said occurrences of substantially simultaneous input signals on both said channels upon expiration of said second predetermined time interval.
Claim 9
Dependent Claim
36 words
In a communication system, the combination of claim 6 further comprising signaling means controlled by said second timing means for transmitting an alerting signal on said one of said channels during said second predetermined time interval.
Claim 10
Dependent Claim
64 words
In a communication system, the combination of claim 7 wherein said signaling means is controlled by said first timing means to transmit an alerting signal on said one of said channels upon expiration of said first predetermined time interval, and further comprising means controlled by said enabling means for disabling said signaling means and said first timing means upon enablement of said connecting means.
Claim 11
Dependent Claim
62 words
In a communication system, the combination of claim 6 wherein said second counting means is controlled by said second timing means to count input signals on said one of said channels only upon expiration of said second time interval and is controlled by said first timing means to count input signals on the other of said channels during said first time interval.
Claim 12
Dependent Claim
39 words
In a communication system, the combination of claim 5 further comprising means for each of said channels for establishing a test connection therefrom to said detecting means, and means controlled by said enabling means for opening said test connections.
Claim 13
Dependent Claim
27 words
In a communication system, the combination of claim 10 wherein said start signal is generated by said test connection establishing means for said one of said channels.
Claim 14
Dependent Claim
73 words
In a communication system, the combination of claim 10 further comprising first and second communication stations respectively connected to said first and second channels, a switching system for establishing said first and second channels by means of switching network connections between said stations and said connecting means, and wherein said test connection establishing means is enabled responsive to the establishment of a switching network connection by said switching system to said connecting means.
Claim 15
Dependent Claim
47 words
In a communication system, the combination of claim 12 wherein each of said communication stations comprises a transducer element, and said occurrences of substantially simultaneous input signals on both said channels occur in response to simultaneous applications of sound to said transducer elements of both said stations.
Claim 16
Dependent Claim
112 words
In a communication system, a first communication channel termination, a second communication channel termination, connecting means operative to interconnect said terminations, timing means responsive to connection request conditions at both said terminations for defining a predetermined interval of time, first counting means for counting each occurrence of simultaneous signals on both said terminations, signals separated by less than a specified amount of time being counted as an occurrence of simultaneous signals, and control means controlled by said timing means and said first counting means for operating said connecting means only in response to a predetermined number oF said occurrences of simultaneous signals on both said terminations within said predetermined interval of time.
Claim 17
Dependent Claim
112 words
In a communication system, a first communication channel termination, a second communication channel termination, connecting means operative to interconnect said terminations, timing means responsive to connection request conditions at both said terminations for defining a predetermined interval of time, first counting means for counting each occurrence of simultaneous signals on both said terminations, signals separated by less than a specified amount of time being counted as an occurrence of simultaneous signals, and control means controlled by said timing means and said first counting means for operating said connecting means only in response to a predetermined number oF said occurrences of simultaneous signals on both said terminations within said predetermined interval of time.
Claim 18
Dependent Claim
112 words
In a communication system, the combination of claim 14 further comprising test connection means responsive to said connection request conditions for establishing test connections from both of said terminations to said counting means, and start means for starting said timing means when both of said test connections are established, and wherein said timing means comprises a first timer for defining the start of said predetermined interval of time upon the elapsing of a first time period after the starting of said timing means, and a second timer for defining the end of said predetermined interval of time upon the elapsing of a second time period after the starting of said timing means.
Claim 19
Dependent Claim
113 words
In a communication system, the combination of claim 15 further comprising second counting means controlled by said timing means for counting each occurrence of a signal on only one of said terminations during said first time period and for counting each occurrence of a signal on either of said terminations during said predetermined interval of time, each occurrence of simultaneous signals on both said terminations during said predetermined interval of time being counted by said second counting means as a single signal occurrence, and means controlled by said second counting means for inhibiting said first counting means when the number of signal occurrences counted by said second counting means exceeds a predetermined limit.
Claim 20
Dependent Claim
63 words
In a communication system, the combination of claim 16 further comprising signaling means controlled by said timing means for applying a signal to one of said terminations during said first time period and upon the elapsing of said second time period, and means controlled by said control means for disabling said timing means and said signaling means when said connecting means is operated.
References Cited (Backward Citations)
US3531773A
Cited
US3662125A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-25 | 1976-12-25 | 1977-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-25 | 1980-12-25 | 1981-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-25 | 1984-12-25 | 1985-06-26 | $7700.00 | Window Closed / Lapsed |