US3557323A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System for remote supervision of repeaters
Assignee: Alcatel CIT SA
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Filing: 1968-03-26
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Granted: 1971-01-19
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Expires: 1988-03-26
Abstract
Abstract A system for remote supervision of repeaters in a telecommunication line wherein each repeater includes a frequency generator supplying a frequency characteristic of the repeater, a control arrangement for passing the output of the frequency generator for all but one given level of an applied control signal and a rectifier device for producing the control signal proportional to the output of the primary amplifier in the repeater, the telecommunication line having an additional generator of a frequency of variable level connected to the input of the line and an indicator for detecting the level of the signal generated by the frequency generator of a particular repeater.
Inventors
- 👤 Christian Chalhoub
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:52
CPC Classifications
H; H04; H04B; H04B17/00; H04B17/40; H04B17/401; H04B17/402; H04B17/403
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
178 words
A system for remote supervision of at least one repeater in a telecommunication line, the repeater including a primary amplifier for amplification of signals on said line, said system comprising: first frequency generator means in said repeater for generating a first frequency signal; rectifier means connected to the output of said primary amplifier for providing a DC control signal whose level is proportional to a signal amplified by said primary amplifier; control means connected to said first frequency generator means and responsive to said DC control signal for blocking the signal of said first frequency generator means for a given value of said DC control signal and for passing said signal therethrough to be delivered to a remote point for substantially all other values thereof; second frequency generator means connected to the input of said primary amplifier from said remote point via said telecommunication line for generating a second frequency signal with a variable level; and detecting means connected to said line at said remote point for detecting the presence of said first frequency signal of said line.
Claim 2
Independent Claim
178 words
A system for remote supervision of at least one repeater in a telecommunication line, the repeater including a primary amplifier for amplification of signals on said line, said system comprising: first frequency generator means in said repeater for generating a first frequency signal; rectifier means connected to the output of said primary amplifier for providing a DC control signal whose level is proportional to a signal amplified by said primary amplifier; control means connected to said first frequency generator means and responsive to said DC control signal for blocking the signal of said first frequency generator means for a given value of said DC control signal and for passing said signal therethrough to be delivered to a remote point for substantially all other values thereof; second frequency generator means connected to the input of said primary amplifier from said remote point via said telecommunication line for generating a second frequency signal with a variable level; and detecting means connected to said line at said remote point for detecting the presence of said first frequency signal of said line.
Claim 3
Dependent Claim
59 words
A system as defined in claim 1 wherein a plurality of repeaters are connected in said telecommunication line, each repeater including individual rectifier means, first frequency generator means generating a signal whose frequency identifies said repeater, and control means capable of being biased in the blocking state at a level of said DC control signal characteristic of said repeater.
Claim 4
Dependent Claim
37 words
A system as defined in claim 1 wherein said control means includes amplifier means having a trough-shaped gain curve with a sharply defined minimum at substantially zero gain for said given value of said DC control signal.
Claim 5
Dependent Claim
83 words
A system as defined in claim 3 wherein said amplifier means includes first and second amplifiers and bias voltage means for biasing said first and second amplifiers so that said first amplifier is cutoff above a voltage level Vo - Sigma and said second amplifier is cutoff below a voltage level Vo + Sigma , where Vo is said given value of said control signal at which said control means is blocking and Sigma is a voltage quantity small in relation to Vo.
Claim 6
Dependent Claim
59 words
A system as defined in claim 4 wherein said first and second amplifiers comprise at least two complementary transistors, the bases of which are connected together to said rectifier means, and means for coupling the output of said first frequency generator means to the emitters of said transistors, the collectors of said transmitters being connected to respective bias voltages.
Claim 7
Dependent Claim
26 words
A system as defined in claim 5 wherein the emitters of said transistors are connected together to a common bias potential in said bias voltage means.
Claim 8
Dependent Claim
25 words
A system as defined in claim 5 wherein the emitters of said transistors are connected separately to individual bias potentials in said bias voltage means.
Claim 9
Dependent Claim
39 words
A system as defined in claim 1 wherein said control means is included in said first frequency generator means and serves to prevent generation of said first frequency signal for said given value of said control signal applied thereto.
Claim 10
Dependent Claim
48 words
A system as defined in claim 1 wherein said second frequency generator means includes regulating means operatively associated with said detecting means for automatically adjusting the level of said second frequency signal to the value wherein said first frequency signal is no longer detected by said detecting means.
Claim 11
Dependent Claim
45 words
A system as defined in claim 9 wherein said regulating means includes recording means for recording the level of the second frequency signal at which said first frequency is no longer detected by said detecting mean for all frequency values of said second frequency signal.
Claim 12
Dependent Claim
113 words
A repeater for use in a telecommunication line comprising: a primary amplifier and frequency selective means connected to the input and output of said amplifier for directing signals thereto and therefrom, respectively; frequency generator means for generating a first frequency signal; rectifier means connected to the output of said primary amplifier for providing a control signal whose level is proportional to a signal amplified by said primary amplifier; and control means connected to said frequency generator means and responsive to said control signal for blocking the signal of said frequency generator means for a given value of said control signal and for passing said signal therethrough for substantially all of the values thereof.
Claim 13
Dependent Claim
113 words
A repeater for use in a telecommunication line comprising: a primary amplifier and frequency selective means connected to the input and output of said amplifier for directing signals thereto and therefrom, respectively; frequency generator means for generating a first frequency signal; rectifier means connected to the output of said primary amplifier for providing a control signal whose level is proportional to a signal amplified by said primary amplifier; and control means connected to said frequency generator means and responsive to said control signal for blocking the signal of said frequency generator means for a given value of said control signal and for passing said signal therethrough for substantially all of the values thereof.
Claim 14
Dependent Claim
36 words
A repeater as defined in claim 11 wherein said control means includes amplifier means having a trough-shaped gain curve with a sharply defined minimum at substantially zero gain for said given value of said control signal.
Claim 15
Dependent Claim
83 words
A repeater as defined in claim 12 wherein said amplifier means includes first and second amplifiers and bias voltage means for biasing said first and second amplifier so that said first amplifier is cutoff above a voltage level Vo - Sigma and said second amplifier is cutoff below a voltage level Vo + Sigma , where Vo is said given value of said control signal at which said control means is blocking and Sigma is a voltage quantity small in relation to Vo.
Claim 16
Dependent Claim
59 words
A repeater as defined in claim 13 wherein said first and second amplifiers comprise at least two complementary transistors, the bases of which are connected together to said rectifier means, and means for coupling the output of said first frequency generator means to the emitters of said transistors, the collectors of said transmitters being connected to respective bias voltages.
Claim 17
Dependent Claim
26 words
A repeater as defined in claim 14 wherein the emitters of said transistors are connected together to a common bias potential in said bias voltage means.
Claim 18
Dependent Claim
25 words
A repeater as defined in claim 14 wherein the emitters of said transistors are connected separately to individual bias potentials in said bias voltage means.
Claim 19
Dependent Claim
39 words
A repeater as defined in claim 11 wherein said control means is included in said first frequency generator means and serves to prevent generation of said first frequency signal for said given value of said control signal applied thereto.
Claim 20
Dependent Claim
24 words
A repeater as defined in claim 11 wherein said first frequency signal has a frequency outside of the communication band of said telecommunication line.
References Cited (Backward Citations)
US3059068A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-18 | 1974-07-20 | 1975-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-18 | 1978-07-20 | 1979-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-18 | 1982-07-20 | 1983-01-19 | $7700.00 | Window Closed / Lapsed |