US5099478A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Communication of secondary channel byte in a synchronous modem without statistical uncertainty
Assignee: Paradyne Corp
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Filing: 1989-05-23
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Granted: 1992-03-24
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Expires: 2009-05-23
Abstract
Abstract A method and system for communicating data over a communications channel such as a telephone line includes the conversion of asynchronous data transmitted from a diagnostic microcomputer through a modem into synchronous data for transmission over the communications channel. The method includes the use of error vectors to shift the asynchronous data into a continuous synchronous stream of data bits.
Inventors
- 👤 Gordon Bremer
- 👤 William L. Betts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:55
CPC Classifications
H; H04; H04L; H04L5/00; H04L5/22; H04L5/24
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
94 words
A method of transmitting secondary channel data signals along with primary data over a communications channel comprising the steps of: converting asynchronous secondary data bits generated at a first end of the communication channel into a stream of synchronous secondary channel data bits for transmission over said channel; indicating the presence of said synchronous secondary channel data bits by modifying said primary data with an error vector; transmitting the synchronous secondary channel data bits over said channel; and converting the synchronous data bits received at a second end of said channel into asynchronous data.
Claim 2
Independent Claim
94 words
A method of transmitting secondary channel data signals along with primary data over a communications channel comprising the steps of: converting asynchronous secondary data bits generated at a first end of the communication channel into a stream of synchronous secondary channel data bits for transmission over said channel; indicating the presence of said synchronous secondary channel data bits by modifying said primary data with an error vector; transmitting the synchronous secondary channel data bits over said channel; and converting the synchronous data bits received at a second end of said channel into asynchronous data.
Claim 3
Dependent Claim
40 words
The method of claim 1 wherein said step of indicating said synchronous secondary channel data bits modifies said primary data with one of a plurality of error vectors to indicate a byte pattern of said synchronous secondary channel data bits.
Claim 4
Independent Claim
84 words
A system of transmitting secondary channel data signals over a communications channel comprising: means for generating asynchronous data bits; means for converting said asynchronous data bits into a stream of synchronous secondary channel data bits; means for indicting the presence of said synchronous secondary channel data bits by modifying primary data with an error vector; means for transmitting said synchronous data bits over said communications channel; and means for converting said synchronous data bits received at said channel's other end into asynchronous data bits.
Claim 5
Independent Claim
84 words
A system of transmitting secondary channel data signals over a communications channel comprising: means for generating asynchronous data bits; means for converting said asynchronous data bits into a stream of synchronous secondary channel data bits; means for indicting the presence of said synchronous secondary channel data bits by modifying primary data with an error vector; means for transmitting said synchronous data bits over said communications channel; and means for converting said synchronous data bits received at said channel's other end into asynchronous data bits.
Claim 6
Dependent Claim
36 words
The system of claim 3 wherein said indicating means further includes means for modifying said primary data with one of a plurality of error vectors to indicate a byte pattern of said synchronous channel data bits.
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) | 1995-03-24 | 1995-09-23 | 1996-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-03-24 | 1999-09-23 | 2000-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-03-24 | 2003-09-23 | 2004-03-24 | $7700.00 | Window Closed / Lapsed |