US4479122A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Remotely controlled switched access to the console port of an electronic computer
Assignee: Nokia Bell Labs
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Filing: 1982-03-05
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Granted: 1984-10-23
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Expires: 2002-03-05
Abstract
Abstract In order to insure continuous access to diagnostic and maintenance information from a computer, the console port of the computer is connected either to the console locally or to a terminal remotely. In response to an activating command from the remote terminal, a switch is operated to disconnect the local console from the computer and another switch is operated to connect the remote terminal to the computer.
Inventors
- 👤 Brian E. Redman
- 👤 Gordon D. Woods
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:13
CPC Classifications
G; G06; G06F; G06F11/00; G06F11/22; G06F11/2294
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
42 words
Apparatus for reversibly disconnecting a console from a computer and simultaneously therewith connecting a modem with said computer, said apparatus comprising first switching means for connecting said console and said computer, and second switching means for connecting said computer and said modem.
Claim 2
Dependent Claim
42 words
Apparatus for reversibly disconnecting a console from a computer and simultaneously therewith connecting a modem with said computer, said apparatus comprising first switching means for connecting said console and said computer, and second switching means for connecting said computer and said modem.
Claim 3
Dependent Claim
44 words
The apparatus according to claim 1 wherein said first switching means comprises first and second bipolar switches, said first bipolar switch facilitating information flow from said computer to said console, and said second bipolar switch facilitating information flow from said console to said computer.
Claim 4
Dependent Claim
60 words
The apparatus according to claim 2 wherein each of said first and second bipolar switches comprises a first network comprising a first diode connected in series with a first phototransistor, and a second network comprising a second diode connected in series with a second phototransistor, said first and second networks connected in parallel so that said phototransistors are oppositely connected.
Claim 5
Dependent Claim
20 words
The apparatus according to claim 3 wherein each of said first and second phototransistors comprises a Darlington pair of phototransistors.
Claim 6
Dependent Claim
38 words
The apparatus according to claim 4 wherein said phototransistors are turned on by light emitted from a first plurality of light emitting diodes, said first light emitting diodes being connected between said computer and a common ground potential.
Claim 7
Dependent Claim
24 words
The apparatus according to claim 1 wherein said second switching means comprises a bipolar switch facilitating information flow from said modem to said computer.
Claim 8
Dependent Claim
39 words
The apparatus according to claim 6 wherein said bipolar switch comprises a pair of reverse biased phototransistors, each of said phototransistors being connected in series with a diode, and each of said phototransistors comprising a pair of Darlington phototransistors.
Claim 9
Dependent Claim
40 words
The apparatus according to claim 7 wherein said phototransistors are turned on by light emitted from a second plurality of light emitting diodes, said second plurality of diodes being connected between said modem and the base electrode of a transistor.
Claim 10
Independent Claim
79 words
The apparatus according to claims 5 or 8 wherein said computer is connected to the collector electrode of said transistor and the emitter electrode of said transistor is connected to said ground potential, so that when said transistor is turned on current flows from the computer through the collector-emitter path of said transistor, thereby operating said first switching means to disconnect said console from said computer and operating said second switching means to connect said modem to said computer.
Claim 11
Dependent Claim
46 words
A remote console arrangement for a digital computer comprising a local console, a modem for communication with a remote console, and switching means, responsive to the activation of said modem by said remote console for transferring said computer from said local console to said remote control.
Claim 12
Dependent Claim
46 words
A remote console arrangement for a digital computer comprising a local console, a modem for communication with a remote console, and switching means, responsive to the activation of said modem by said remote console for transferring said computer from said local console to said remote control.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-10-23 | 1988-04-23 | 1988-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-10-23 | 1992-04-23 | 1992-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-10-23 | 1996-04-23 | 1996-10-23 | $7700.00 | Window Closed / Lapsed |