Patent US5898761A successfully refreshed from Google Patents.
US5898761A
Expired / Lapsed
US
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Communication server apparatus using digital signal switching and method
Assignee: Cisco Technology Inc
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Filing: 1997-01-10
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Granted: 1999-04-27
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Expires: 2017-01-10
Abstract
Abstract A communication server (58) using digital signal switching is provided. A plurality of twisted pair subscriber lines are split into twisted pair data lines (54) and twisted pair phone lines (52). Analog signals received on the twisted pair data lines (54) are converted into incoming parallel digital words and outgoing parallel digital words are converted into analog signals for transmission on the twisted pair data lines (54) using first converters (614) coupled to each twisted pair data line (54). The incoming parallel digital words are converted into incoming serial bit streams and outgoing serial bit streams are converted into the outgoing parallel digital words using second converters (616) coupled to the first converters (614). A need for data service is detected on a selected twisted pair data line (54), and one of the XDSL modems (620) is selected in response to detecting the need for data service. The selected XDSL modem (620) is then coupled to a second converter (616) associated with the selected twisted pair data line (54) where the selected XDSL modem (620) receives the incoming serial bit stream from and provides the outgoing serial bit stream to the associated second converter (616).
Inventors
- 👤 John F. McHale
- 👤 James R. Sisk
- 👤 Robert H. Locklear, Jr.
- 👤 Jason McCullough
- 👤 Clifford L. Hall
- 👤 Ronald E. Ham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:32
CPC Classifications
H; H04; H04L; H04L12/00; H04L12/28; H04L12/2854; H04L12/2856; H04L12/2869; H04L12/2878; H04L12/2887; H04L12/2889; H04L12/46; H04L12/4604; H04L12/4612; H04L12/54; H04L12/56; H04L12/5691; H04L12/5692; H04L27/00; H04L27/0008; H04M; H04M11/00; H04M11/06; H04M11/062; H04Q; H04Q11/00; H04Q11/04; H04Q11/0421; H04Q2213/00; H04Q2213/13003; H04Q2213/1302; H04Q2213/13036; H04Q2213/13039; H04Q2213/1304; H04Q2213/13093; H04Q2213/13103; H04Q2213/13106; H04Q2213/13109; H04Q2213/1319; H04Q2213/13196; H04Q2213/13199; H04Q2213/13203; H04Q2213/13204; H04Q2213/13213; H04Q2213/1329; H04Q2213/13292; H04Q2213/13299; H04Q2213/13302; H04Q2213/1332; H04Q2213/13322; H04Q2213/1334; H04Q2213/13349; H04Q2213/13389
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
224 words
A communication server coupled to a plurality of twisted pair data lines, each twisted pair data line coupled to an associated twisted pair subscriber line by a splitter, the communication server comprising: a plurality of line interface components and detectors, each line interface components and detector coupled to an associated twisted pair data line, the line interface components and detectors operable to detect a need for data service on the twisted pair data line and provide a signal indicating a request for service; a plurality of analog/digital and digital/analog converters, each analog/digital and digital/analog converter coupled to an associated line interface components and detector; a plurality of parallel/serial and serial/parallel converters, each parallel/serial and serial/parallel converter coupled to an associated analog/digital and digital/analog converter; a plurality of XDSL modems; a digital multiplexer coupled to the parallel/serial and serial/parallel converters and coupled to the XDSL modems, the digital multiplexer operable to couple a selected subset of the parallel/serial and serial/parallel converters to the XDSL modems; and a controller coupled to the detector and to the digital multiplexer, the controller operable to select one of the XDSL modems in response to detecting the need for data service, the controller further operable to direct the digital multiplexer to couple the selected XDSL modem to the parallel/serial and serial/parallel converter associated with the detected need for data service.
Claim 2
Dependent Claim
224 words
A communication server coupled to a plurality of twisted pair data lines, each twisted pair data line coupled to an associated twisted pair subscriber line by a splitter, the communication server comprising: a plurality of line interface components and detectors, each line interface components and detector coupled to an associated twisted pair data line, the line interface components and detectors operable to detect a need for data service on the twisted pair data line and provide a signal indicating a request for service; a plurality of analog/digital and digital/analog converters, each analog/digital and digital/analog converter coupled to an associated line interface components and detector; a plurality of parallel/serial and serial/parallel converters, each parallel/serial and serial/parallel converter coupled to an associated analog/digital and digital/analog converter; a plurality of XDSL modems; a digital multiplexer coupled to the parallel/serial and serial/parallel converters and coupled to the XDSL modems, the digital multiplexer operable to couple a selected subset of the parallel/serial and serial/parallel converters to the XDSL modems; and a controller coupled to the detector and to the digital multiplexer, the controller operable to select one of the XDSL modems in response to detecting the need for data service, the controller further operable to direct the digital multiplexer to couple the selected XDSL modem to the parallel/serial and serial/parallel converter associated with the detected need for data service.
Claim 3
Dependent Claim
34 words
The communication server of claim 1, further comprising a network interface/multiplexer coupled to the XDSL modems, the network interface/multiplexer operable to combine information received from the XDSL modems for communication across an attached network.
Claim 4
Dependent Claim
20 words
The communication server of claim 1, wherein the controller is coupled to and operable to communicate with the network interface/multiplexer.
Claim 5
Independent Claim
184 words
A method for coupling a selected subset of a plurality of twisted pair subscriber lines to a plurality of XDSL modems, the method comprising: splitting each twisted pair subscriber line into a twisted pair data line and a twisted pair phone line; converting analog signals received on the twisted pair data lines into incoming parallel digital words and converting outgoing parallel digital words into analog signals for transmission on the twisted pair data lines using first converters coupled to each twisted pair data line; converting the incoming parallel digital words into incoming serial bit streams and converting outgoing serial bit streams into the outgoing parallel digital words using second converters coupled to the first converters; detecting a need for data service on a selected twisted pair data line; selecting one of the XDSL modems in response to detecting the need for data service; and coupling the selected XDSL modem to a second converter associated with the selected twisted pair data line, the selected XDSL modem receiving the incoming serial bit stream from and providing the outgoing serial bit stream to the associated second converter.
Claim 6
Independent Claim
184 words
A method for coupling a selected subset of a plurality of twisted pair subscriber lines to a plurality of XDSL modems, the method comprising: splitting each twisted pair subscriber line into a twisted pair data line and a twisted pair phone line; converting analog signals received on the twisted pair data lines into incoming parallel digital words and converting outgoing parallel digital words into analog signals for transmission on the twisted pair data lines using first converters coupled to each twisted pair data line; converting the incoming parallel digital words into incoming serial bit streams and converting outgoing serial bit streams into the outgoing parallel digital words using second converters coupled to the first converters; detecting a need for data service on a selected twisted pair data line; selecting one of the XDSL modems in response to detecting the need for data service; and coupling the selected XDSL modem to a second converter associated with the selected twisted pair data line, the selected XDSL modem receiving the incoming serial bit stream from and providing the outgoing serial bit stream to the associated second converter.
Claim 7
Dependent Claim
13 words
The method of claim 4, wherein coupling is accomplished using a digital multiplexer.
Claim 8
Dependent Claim
19 words
The method of claim 4, wherein detecting comprises coupling, in succession, a detector to the twisted pair data lines.
Claim 9
Dependent Claim
23 words
The method of claim 4, wherein detecting comprises coupling one of a plurality of detectors to each of the twisted pair data lines.
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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) | 2002-04-26 | 2002-10-26 | 2003-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-04-26 | 2006-10-26 | 2007-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-04-26 | 2010-10-26 | 2011-04-27 | $7700.00 | Window Closed / Lapsed |