US5157715A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Call status recognition in a broadband private automatic branch exchange
Assignee: Alcatel Lucent NV
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Filing: 1991-01-31
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Granted: 1992-10-20
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Expires: 2011-01-31
Abstract
Abstract In a broadband private automatic branch exchange (BB-PABX) in which a plurality of broadband terminals (BB-E1, . . . , BB-E26) are connected to a broadband switching array (BB-V) to switch video and data signals, the current call status of the system must be signaled to the terminals, so that a broadband connection may be activated. For this purpose, a message characterizing a quiescent state is supplied to one input/output (O) of the broadband switching array (BB-V) of the private automatic branch exchange and all nonswitched input/output (1, 2, . . . , 30) controlled by an associated control unit (C) are linked with the first input/output (O) so that the quiescent state message is always transmitted to all nonswitched terminals.
Inventors
- 👤 Oliver Fischer
- 👤 Guido Linsenmaier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:48
CPC Classifications
H; H04; H04Q; H04Q11/00; H04Q11/04; H04Q11/0428; H04Q11/0478; H04J; H04J2203/00; H04J2203/0001; H04J2203/0064; H04J2203/0066
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
107 words
Apparatus for signaling a call status of a broadband private automatic branch exchange to a plurality of broadband terminals, said apparatus comprising: a broadband switching array for selectively coupling video and data signals between a plurality of inputs/outputs, a signal unit for applying a quiescent signal characteristic of a nonswitched state to a first input/output of the broadband switching array, and a control unit connected to the switching array for causing said switching array to couple to said first input/output any nonswitched inputs/outputs not currently coupled by said broadband switching array to another of said inputs/outputs, whereby said quiescent signal is transmitted to all nonswitched broadband terminals.
Claim 2
Dependent Claim
107 words
Apparatus for signaling a call status of a broadband private automatic branch exchange to a plurality of broadband terminals, said apparatus comprising: a broadband switching array for selectively coupling video and data signals between a plurality of inputs/outputs, a signal unit for applying a quiescent signal characteristic of a nonswitched state to a first input/output of the broadband switching array, and a control unit connected to the switching array for causing said switching array to couple to said first input/output any nonswitched inputs/outputs not currently coupled by said broadband switching array to another of said inputs/outputs, whereby said quiescent signal is transmitted to all nonswitched broadband terminals.
Claim 3
Dependent Claim
30 words
A circuit arrangement according to claim 1, wherein said signal unit which generates a message characteristic of a quiescent is a bit generator which generates an arbitrary, predetermined bit sequence.
Claim 4
Dependent Claim
17 words
A circuit arrangement according to claim 2, wherein the bit generator forms part of the control unit.
Claim 5
Dependent Claim
39 words
A circuit arrangement according to claim 2, wherein the bit generator is connected to the first input of the switching array via a data channel and a multiplexer/demultiplexer for the data channel, an audio channel, and a video channel.
Claim 6
Dependent Claim
19 words
A circuit arrangement according to claim 1, wherein the signal unit is a sound generator or a video-signal generator.
References Cited (Backward Citations)
US3684833A
Cited
US4638124A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-10-20 | 1996-04-20 | 1996-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-10-20 | 2000-04-20 | 2000-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-10-20 | 2004-04-20 | 2004-10-20 | $7700.00 | Window Closed / Lapsed |