Patent US5048012A successfully refreshed from Google Patents.
US5048012A
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Data link controller with flexible multiplexer
Assignee: RPX Corp
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Filing: 1989-02-14
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Granted: 1991-09-10
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Expires: 2009-02-14
Abstract
Abstract A data link controller is provided which is suitable for use in ISDN applications, employing bit-oriented protocols. The data link controller can be operated in a time-division multiplexed mode or a non-time-division multiplexed mode. In the multiplexed mode, data in one of up to thirty-one selectable time slots is received by the data link controller under control of a microprocessor. One of the time slots can be selected via the microprocessor which allows a lengthened contiguous number of bits to be received, effectively increasing the reception rate. In the non-multiplexed mode, data is received in a continuous stream. In the multiplexed mode, up to thirty-one time slots are available for transmission of data. One of the time slots can be selected which allows a lengthened continuous number of bits to be transmitted, effectively increasing the transmission rate. In the lengthened configuration, by doubling the length of the time slot, two 64 kbps B-channels can act as a single 128 kbps channel.
Inventors
- 👤 Dale E. Gulick
- 👤 Terry G. Lawell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:22
CPC Classifications
H; H04; H04Q; H04Q11/00; H04Q11/04; H04Q11/0428
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
96 words
A bidirectional data communication port adaptable for use with a data link controller for controlling data communications with a station, the data communications port comprising transmitting means for transmitting outbound data to said station and receiving means for receiving inbound data from said station; said transmitting means including time slot multiplexer means for selectively establishing time-relations for said outbound data in response to a plurality of first clock signals; and said receiving means including a time segment demultiplexer means for selectively establishing time-correspondences for said inbound data in response to a plurality of second clock signals.
Claim 2
Dependent Claim
96 words
A bidirectional data communication port adaptable for use with a data link controller for controlling data communications with a station, the data communications port comprising transmitting means for transmitting outbound data to said station and receiving means for receiving inbound data from said station; said transmitting means including time slot multiplexer means for selectively establishing time-relations for said outbound data in response to a plurality of first clock signals; and said receiving means including a time segment demultiplexer means for selectively establishing time-correspondences for said inbound data in response to a plurality of second clock signals.
Claim 3
Dependent Claim
123 words
A bidirectional data communication port as recited in claim 1 wherein at least a first of said plurality of first clock signals causes said time slot multiplexer means to establish a first time-relation by which said outbound data is transmitted conforming to time slots, said time slots being determined by said at least a first of said plurality of first clock signals; and at least a second of said plurality of first clock signals causes said time slot multiplexer means to establish a second time-relation by which said outbound data is transmitted at a continuous transmission rate for a transmission duration, said transmission rate and said transmission duration being determined by said at least a second of said plurality of first clock signals.
Claim 4
Dependent Claim
122 words
A bidirectional data communication port as recited in claim 1 wherein at least a first of said plurality of second clock signals causes said time segment demultiplexer means to establish a first time-correspondence by which said inbound data is received during time segments, said time segments being determined by said at least a first of said plurality of second clock signals; and at least a second of said plurality of second clock signals causes said time segment demultiplexer means to establish a second time-correspondence by which said inbound data is received at a continuous reception rate for a reception duration, said reception rate and said reception duration being determined by said at least a second of said plurality of second clock signals.
Claim 5
Dependent Claim
122 words
A bidirectional data communication port as recited in claim 2 wherein at least a first of said plurality of second clock signals causes said time segment demultiplexer means to establish a first time-correspondence by which said inbound data is received during time segments, said time segments being determined by said at least a first of said plurality of second clock signals; and at least a second of said plurality of second clock signals causes said time segment demultiplexer means to establish a second time-correspondence by which said inbound data is received at a continuous reception rate for a reception duration, said reception rate and said reception duration being determined by said at least a second of said plurality of second clock signals.
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) | 1994-09-09 | 1995-03-11 | 1995-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-09-09 | 1999-03-11 | 1999-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-09-09 | 2003-03-11 | 2003-09-10 | $7700.00 | Window Closed / Lapsed |