Robert E Locklear

US Patent:

20050141563, Jun 30, 2005

Filed:

Feb 16, 2005

Appl. No.:

11/060472

Inventors:

John McHale - Austin TX, US
Robert Locklear - Austin TX, US
Robert Burke - Austin TX, US

International Classification:

H04L012/66

US Classification:

370493000, 379093070, 379093140, 379093290

Abstract:

A communication system () includes a plurality of subscriber systems () coupled to a plurality of twisted pair data lines (). Each subscriber system () has an availability guarantee value, which may specify a level of service for the subscriber system (). A communication server () is coupled to the plurality of subscriber systems (). The communication server () selectively couples a subscriber system (), responsive to a request for service, to either a first modem pool () or a second modem pool () based on the availability guarantee value associated with the subscriber system (). Communication server () can also provide a soft-termination state and dynamic network address allocation for subscriber systems ().

US Patent:

61608432, Dec 12, 2000

Filed:

Jul 14, 1997

Appl. No.:

8/891893

Inventors:

John F. McHale - Austin TX
Robert H. Locklear - Austin TX
Robert M. Burke - Austin TX

Assignee:

Cisco Technology, Inc. - San Jose CA

International Classification:

H04B 138

US Classification:

375222

Abstract:

A communication system (500) includes a plurality of subscriber systems (510) coupled to a plurality of twisted pair data lines (520). Each subscriber system (510) has an availability guarantee value, which may specify a level of service for the subscriber system (510). A communication server (502) is coupled to the plurality of subscriber systems (510). The communication server (502) selectively couples a subscriber system (510), responsive to a request for service, to either a first modem pool (530) or a second modem pool (540) based on the availability guarantee value associated with the subscriber system (510). Communication server (502) can also provide a soft-termination state and dynamic network address allocation for subscriber systems (510).

US Patent:

61697885, Jan 2, 2001

Filed:

Oct 30, 1998

Appl. No.:

9/183113

Inventors:

John F. McHale - Austin TX
James R. Sisk - Cedar Park TX
Robert H. Locklear - Austin TX
Jason McCullough - Austin TX
Clifford L. Hall - Austin TX
Ronald E. Ham - Austin TX

Assignee:

Cisco Technology, Inc. - San Jose CA

International Classification:

H04M 1100

US Classification:

379 9314

Abstract:

A communication server includes a modem pool (652) that comprises a plurality of XDSL modems (660). The communication server also includes a plurality of line interface modules (650). Each line interface module (650) has a plurality of inputs each coupled to a twisted pair data line and has a plurality of outputs each coupled to one of the XDSL modems (660). Each line interface module (650) operates to detect a need for data service on a requesting twisted pair data line and to couple the requesting twisted pair data line to an output associated with a selected XDSL modem (660). A controller (653) is coupled to the XDSL modems (660) and to the plurality of line interface modules (650). The controller (653) operates to select one of the XDSL modems (660) in response to a detected need for data service. The controller (653) further operates to direct the line interface module (650) to which a requesting twisted pair data line is coupled to couple the requesting twisted pair data line to the output associated with the selected XDSL modem (660).

US Patent:

62528785, Jun 26, 2001

Filed:

Oct 30, 1997

Appl. No.:

8/960590

Inventors:

Robert H. Locklear - Austin TX
Craig S. Cantrell - Austin TX
Kip R. McClanahan - Austin TX
William K. Brewer - Austin TX
Anthony J. P. Carew - Austin TX

Assignee:

Cisco Technology, Inc. - San Jose CA

International Classification:

H04L 1228

US Classification:

370401

Abstract:

A communication system includes an access server that communicates information between a wide area network (WAN) and a local area network (LAN). The access server includes a WAN interface, a switch fabric, a number of route processors, and a LAN interface. The switch fabric directs information from the WAN interface to a selected route processor based on its loading characteristics.

US Patent:

59057815, May 18, 1999

Filed:

Mar 28, 1997

Appl. No.:

8/828421

Inventors:

John F. McHale - Austin TX
James R. Sisk - Cedar Park TX
Robert H. Locklear - Austin TX
William K. Brewer - Austin TX
Clifford L. Hall - Austin TX

Assignee:

Cisco Technology, Inc. - San Jose CA

International Classification:

H04M11/00

US Classification:

379 9314

Abstract:

A communication server (700) is disclosed and includes a plurality of XDSL transceiver units (710) and a plurality of line interface modules (702). Each line interface module (702) has a plurality of inputs each coupled to a twisted pair data line. Each line interface module (702) also has a plurality of outputs each associated with one of the XDSL transceiver units (710). Each line interface (702) is operable to couple a requesting twisted pair data line to an output associated with a selected XDSL transceiver unit (710). The communication server (700) also includes a network interface (714) that has a plurality of inputs coupled to associated XDSL transceiver units (710). The communication server (700) further includes a system controller (712) coupled to the XDSL transceiver units (710), to the plurality of line interface modules (702) and to the network interface (714). The system controller (712) is operable to select an available XDSL transceiver unit (710) in response to a detected request for data service and to direct the line interface module (702), to which the twisted pair data line requesting data service is coupled, to connect the requesting twisted pair data line to the selected XDSL transceiver unit (710).

US Patent:

59995653, Dec 7, 1999

Filed:

Oct 15, 1997

Appl. No.:

8/951151

Inventors:

Robert H. Locklear - Austin TX
Craig S. Cantrell - Austin TX
Kip R. McClanahan - Austin TX

Assignee:

Cisco Technology, Inc. - San Jose CA

International Classification:

H04B 138

US Classification:

375222

Abstract:

A communication system includes a number of communication devices coupled to a data network using communication servers. The communication system supports communication sessions between a variety of networks and devices using, at least in part, XDSL communication techniques. Specifically, information associated with a session passes between a device and an associated server using a modifiable number of XDSL modems and associated twisted pair lines.

US Patent:

57816174, Jul 14, 1998

Filed:

Jan 10, 1997

Appl. No.:

8/781482

Inventors:

John F. McHale - Austin TX
James R. Sisk - Cedar Park TX
Robert H. Locklear - Austin TX
Jason McCullough - Austin TX
Clifford L. Hall - Austin TX
Ronald E. Ham - Austin TX

Assignee:

NetSpeed, Inc. - Austin TX

International Classification:

H04M 1100

US Classification:

379 9314

Abstract:

A communication server (58) includes a plurality of pairs of frequency agile modulators (638) and demodulators (640) each set to operate at a unique frequency and associated with a twisted pair data line (54). The communication server (58) also includes a plurality of pairs of demodulators (644) and modulators (646) that each have a designatable operation frequency and are associated with one of a plurality of XDSL modems (648). A mixer (642) operates to combine signals from the frequency agile modulators (638) and provide the combined signal to the demodulators (644). The mixer (642) further operates to combine signals from the modulators (646) and provide the combined signal to the frequency agile demodulators (640). A detector (634) operates to detect a need for data service on a selected twisted pair data line (54). The controller (636) then operates to couple the selected twisted pair data line (54) to the selected XDSL modem (648) by designating the demodulator (644) and modulator (646) pair associated with the selected XDSL modem (648) to operate at the unique frequency of the frequency agile modulator (638) and demodulator (640) associated with the selected twisted pair data line (54).

US Patent:

58526552, Dec 22, 1998

Filed:

Jan 10, 1997

Appl. No.:

8/781441

Inventors:

John F. McHale - Austin TX
James R. Sisk - Cedar Park TX
Robert H. Locklear - Austin TX
Jason McCullough - Austin TX
Clifford L. Hall - Austin TX
Ronald E. Ham - Austin TX

Assignee:

Cisco Systems, Inc. - San Jose CA

International Classification:

H04M 1100

US Classification:

379 9314

Abstract:

A communication server includes a modem pool (652) that comprises a plurality of XDSL modems (660). The communication server also includes a plurality of line interface modules (650). Each line interface module (650) has a plurality of inputs each coupled to a twisted pair data line and has a plurality of outputs each coupled to one of the XDSL modems (660). Each line interface module (650) operates to detect a need for data service on a requesting twisted pair data line and to couple the requesting twisted pair data line to an output associated with a selected XDSL modem (660). A controller (653) is coupled to the XDSL modems (660) and to the plurality of line interface modules (650). The controller (653) operates to select one of the XDSL modems (660) in response to a detected need for data service. The controller (653) further operates to direct the line interface module (650) to which a requesting twisted pair data line is coupled to couple the requesting twisted pair data line to the output associated with the selected XDSL modem (660).