US4417335A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Digital satellite telephone office
Assignee: AG Communication Systems Corp
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Filing: 1981-11-20
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Granted: 1983-11-22
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Expires: 2001-11-20
Abstract
Abstract A 4 KHz channel is used for communication between a processing unit associated with a satellite telephone office and a processing unit associated with a connected class 5 telephone office. A data link circuit is connected to the processing unit of the satellite office and operates to transmit data communications between the processing unit of the satellite office and the class 5 telephone office via the 4 KHz channel.
Inventors
- 👤 Michael J. Kelly
- 👤 Robert L. Lindsay
- 👤 Alex W. Kobylar
- 👤 David J. Stelte
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:34
CPC Classifications
H; H04; H04Q; H04Q11/00; H04Q11/04
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
199 words
A satellite digital telephone system including a satellite digital telephone office, said office including a plurality of line circuits, a first digital network operated to generate a first plurality of parallel date groups, and a first processing unit operated to generate digital data respresentative of the status and identity of said line circuits, said satellite telephone system comprising: a first digital trunk connected to said first digital network operated in response to said first parallel data groups to periodically generate alternately occurring first and second serial data streams, each comprising said first plurality of parallel data groups, said digital trunk further operated to generate a first terminal framing bit and concatenate said first terminal framing bit to each of said first plurality of data streams; first data link means connected to said processing unit and to said digital trunk, operated in response to said digital data from said processing unit to concatenate each successive one said second plurality of data streams; and first polarity conversion means connected to said first data link means operated in response to said first and second pluralities of data streams to generate bipolar signals representative of said first and second pluralities of data streams.
Claim 2
Dependent Claim
199 words
A satellite digital telephone system including a satellite digital telephone office, said office including a plurality of line circuits, a first digital network operated to generate a first plurality of parallel date groups, and a first processing unit operated to generate digital data respresentative of the status and identity of said line circuits, said satellite telephone system comprising: a first digital trunk connected to said first digital network operated in response to said first parallel data groups to periodically generate alternately occurring first and second serial data streams, each comprising said first plurality of parallel data groups, said digital trunk further operated to generate a first terminal framing bit and concatenate said first terminal framing bit to each of said first plurality of data streams; first data link means connected to said processing unit and to said digital trunk, operated in response to said digital data from said processing unit to concatenate each successive one said second plurality of data streams; and first polarity conversion means connected to said first data link means operated in response to said first and second pluralities of data streams to generate bipolar signals representative of said first and second pluralities of data streams.
Claim 3
Dependent Claim
24 words
A satellite digital telephone system as claimed in claim 1, wherein: said satellite digital telephone office is connected to a base unit telephone office.
Claim 4
Dependent Claim
121 words
A satellite digital telephone system as claimed in claim 2, wherein said base unit telephone office comprises: second polarity conversion means connected to said first polarity conversion means operated in response to said bipolar signals from said first polarity conversion means to generate unipolar signals representative of said first bipolar signals; second data link means connected to said second polarity conversion means, operated in response to said first unipolar signals to retrieve each bit of said digital data representative of the status of said line circuits, from said second plurality of data streams; and a second processing unit connected to said second date link means operated in response to said retrieved line circuit status bits to generate line circuit control bits.
Claim 5
Dependent Claim
183 words
A satellite digital telephone system as claimed in claim 3, wherein said base unit telephone office further includes a second digital network operated to generate a second plurality of parallel data groups, said base unit telephone office further comprising: a second digital trunk connected to said second digital network, operated in response to said second parallel data groups to periodically generate alternately occurring third and fourth serial data streams, each comprising said second plurality of parallel data groups, said second digital trunk further operated to generate a second terminal framing bit, and concatenate said second terminal framing bit to each of said third plurality of data streams; said second data link means further connected to said second digital trunk, operated in response to said line circuit control bits to concatenate each successive one of said line circuit control bits to each successive one of said fourth plurality of data streams; and said second polarity conversion means further operated in reponse to said third and fourth pluralities of data streams to generate bipolar signals representative of said third and fourth pluralities of data streams.
Claim 6
Dependent Claim
40 words
A satellite digital telephone system as claimed in claim 4, wherein: said first polarity conversion means further operated in response to said bipolar signals from said second polarity conversion means to generate unipolar signals representative of said second bipolar signals.
Claim 7
Dependent Claim
42 words
A satellite digital telephone system as claimed in claim 5, wherein: said first data link means further operated in response to said second unipolar signals to retrieve each bit of said line circuit control bits from said fourth plurality of data streams.
Claim 8
Dependent Claim
41 words
A satellite digital telephone system as claimed in claim 6, wherein: said first processing unit is further connected to said line circuits, and further operated in response to said retrieved line circuit control bits to control and monitor said line circuits.
Claim 9
Dependent Claim
173 words
A satellite digital telephone system as claimed in claim 7, wherein said first digital trunk means further operated in response to said second data stream to generate a first timing pulse representative of the occurrence of the last bit of said second data stream, said first data link means comprising: first parallel to serial conversion means connected to said first processing unit; first gating means connected to said first parallel to serial conversion means, to said first digital trunk and to said first polarity conversion means; said first parallel to serial conversion means operated in response to said digital data from said processing unit and each of said first timing pulses to sequentially transfer each bit of said digital data from said first processing unit to said first gating means; and said first gating means operated in response to each of said second data streams and each of said first timing pulses to concatenate each of said bits transferred by said parallel to serial conversion means, to each correspondingly occurring second data stream.
Claim 10
Dependent Claim
113 words
A satellite digital telephone system as claimed in claim 8, wherein: said first digital trunk means further operated in response to said fourth data stream to generate a second timing pulse representative of the occurrence of the last bit of said fourth data stream; said first gating means operated in response to each of said fourth data streams and each of said second timing pulses to retrieve said line control bits from said fourth data streams; said first parallel to serial conversion means operated in response to said retrieved line control bits end said correspondingly occurring second timing pulse to generate parallel data representative of a predetermined number of said line control bits;
Claim 11
Dependent Claim
23 words
A satellite digital telephone system as claimed in claim 8, wherein said parallel to serial conversion means comprise: a universal asynchronous receiver transmitter.
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) | 1986-11-21 | 1987-05-23 | 1987-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-11-21 | 1991-05-23 | 1991-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-11-21 | 1995-05-23 | 1995-11-22 | $7700.00 | Window Closed / Lapsed |