US4734935A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Communication system with remotely controllable signal receiving means
Assignee: NEC Corp
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Filing: 1986-05-19
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Granted: 1988-03-29
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Expires: 2006-05-19
Abstract
Abstract A communication system having remotely controllable signal receiving means for automatically setting the receive function for a start-signal transmitted from a terminal device and for changing the receive function when the terminal device is changed. At start-up, a main processor reads start-signal type information for each of the terminal devices from a main memory. The line circuits associated with the respective terminal devices are then set with a start-signal receive function according to the start-signal type information. When a terminal device is added or changed, the start-signal receive function is changed by merely updating the start-signal type information stored in the main memory.
Inventors
- 👤 Kentaro Toudo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 01:13
CPC Classifications
H; H04; H04M; H04M3/00; H04M3/005; H04Q; H04Q11/00; H04Q11/04; H04Q11/0407
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
195 words
A communication system with remotely controllable signal receiving means comprising: first means having a receive function responsive to a start-signal from a terminal device connected thereto via a communication line, said first means arranged at one of a plug-in or plug-out states wherein said first means is connected to the terminal device in the plug-in state and is not connected to the terminal device in the plug-out state; second means storing start-signal type information of the terminal device in a manner indexable with accommodation location information of the terminal device; third means for independently monitoring the plug-in and plug-out states of said first means and detecting a change in the states; and fourth means for controlling an initial setting of the receive function of said first means on the basis of the start-signal type information stored in said second means, said fourth means further being responsive to the change in the states of said first means detected by said third means wherein communication service to said first means in the plug-out state is inhibited and wherein the receive function of said first means is reset when said first means is changed into the plug-in state.
Claim 2
Dependent Claim
195 words
A communication system with remotely controllable signal receiving means comprising: first means having a receive function responsive to a start-signal from a terminal device connected thereto via a communication line, said first means arranged at one of a plug-in or plug-out states wherein said first means is connected to the terminal device in the plug-in state and is not connected to the terminal device in the plug-out state; second means storing start-signal type information of the terminal device in a manner indexable with accommodation location information of the terminal device; third means for independently monitoring the plug-in and plug-out states of said first means and detecting a change in the states; and fourth means for controlling an initial setting of the receive function of said first means on the basis of the start-signal type information stored in said second means, said fourth means further being responsive to the change in the states of said first means detected by said third means wherein communication service to said first means in the plug-out state is inhibited and wherein the receive function of said first means is reset when said first means is changed into the plug-in state.
Claim 3
Dependent Claim
37 words
A communication system as in claim 1, wherein said start-signal type information is one of a first and second type wherein said first type indicates a closed-loop start signal and said second type indicates a ground-start signal.
Claim 4
Dependent Claim
45 words
A communication system as in claim 2, wherein said first means further includes: means for receiving the start-signal type information; and means for switching the connection of the first means to the terminal device according to the first and second type of start-signal type information.
Claim 5
Dependent Claim
21 words
A communication system as in claim 1, further including means for changing the start-signal type information stored in said second means.
Claim 6
Dependent Claim
23 words
A communication system as in claim 1, wherein said third means further includes means for storing indications of the plug-in and plug-out states.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-03-29 | 1991-09-28 | 1992-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-03-29 | 1995-09-28 | 1996-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-03-29 | 1999-09-28 | 2000-03-29 | $7700.00 | Window Closed / Lapsed |