Harold D Webber

US Patent:

7781915, Aug 24, 2010

Filed:

Apr 3, 2007

Appl. No.:

11/695772

Inventors:

Harold H. Webber - Lafayette CA, US
John R. Marum - Oakland CA, US

Assignee:

Tut Systems, Inc. - Lake Oswego OR

International Classification:

H04B 3/00

US Classification:

307100

Abstract:

Apparatus for delivering operating power from a data terminus to a utilization device includes a first data connection connecting the data terminus to a data repeater station and a second data connection connecting the data repeater station to the utilization device. A first power sourcing equipment delivers DC operating power to the data repeater station over a physical layer of the first data connection. A second power sourcing equipment at the repeater station receives operating power over the physical layer of the first data connection and delivers operating power over a physical layer of the second data connection to the utilization device.

US Patent:

54147085, May 9, 1995

Filed:

Dec 1, 1992

Appl. No.:

7/985169

Inventors:

Harold H. Webber - Berkeley CA
John Marum - Oakland CA

Assignee:

Farallon Computing, Inc. - Alameda CA

International Classification:

H04J 302

US Classification:

370 853

Abstract:

The present invention provides a method and apparatus for extending an Ethernet 10Base-T local area network topology from only allowing point-to-point link segments to allowing daisy-chained segments having multiple nodes on each segment. Thus, computer equipment can be connected in a bus topology while retaining the characteristics of a 10Base-T node according to IEEE Standard 802. 3 for 10Base-T Ethernet. In the preferred embodiment of the present invention, a non-reclocking repeater at a 10Base-T node retransmits data packets from the node to subsequent nodes in a daisy-chained segment. When the repeater is not powered, bypass circuitry connects the two ends of 10Base-T wiring to remove the inactive node from the daisy-chain segment. The repeater includes modular connectors and analog transmit and receive sections for transmitting and receiving differential signals between two network link interfaces and an AUI. The repeater further comprises digital logic to implement the functional circuitry of a 10Base-T Medium Attachment Unit (MAU).

US Patent:

49439790, Jul 24, 1990

Filed:

May 12, 1988

Appl. No.:

7/193854

Inventors:

Harold H. Webber - Berkeley CA

Assignee:

Farallon Computing Corporation - Emeryville CA

International Classification:

H03K 1100
H04L 2560

US Classification:

375 4

Abstract:

A multiple port signal regenerator for facilitating communication between a plurality of (two or more) computers and computer peripheral devices ("computer products") in a local access network. The regenerator includes logic circuits that: (1) receives, processes and transmits an incoming message from a source computer product and ignores subsequently received incoming messages from other computer products until the first-received message is processed; (2) suppresses or ignores, for a predetermined punishment time interval, subsequent messages received from a source computer product, if temporal length of a message received from the source exceeds a predetermined protocol time interval; and (3) after the end of a message is received, determines when the lines of a network are all idle so that the regenerator can be re-activated to receive another incoming message from a computer product in the network.

US Patent:

59635398, Oct 5, 1999

Filed:

Sep 8, 1997

Appl. No.:

8/925043

Inventors:

Harold H. Webber - Lafayette CA
Jeremiah Jeffress - Orinda CA

Assignee:

Tut Systems, Inc. - Pleasant Hill CA

International Classification:

H03K 708
H04L 12413

US Classification:

370213

Abstract:

A method and apparatus for detecting a collision between signal transmissions on a carrier medium, such as UTP wiring, are described. The method commences with the transmission of an access identifier from a transmitter of a network device. The transmitted access identifier has a predetermined duration and includes a pulse at a temporal location within the transmitted access identifier specific thereto. An access identifier is also received at a receiver of the network device. The received access identifier also has a predetermined duration, and includes a pulse at a temporal location therein. A determination is then made as to whether the temporal location of the pulse within the received access identifier corresponds to the temporal location of the pulse within the transmitted access identifier. If not, a collision is detected on the network.

US Patent:

51193981, Jun 2, 1992

Filed:

Oct 19, 1989

Appl. No.:

7/423912

Inventors:

Harold H. Webber - Berkeley CA

Assignee:

Farallon Computing, Inc. - Emeryville CA

International Classification:

H04B 138

US Classification:

375 7

Abstract:

A multiple port signal regenerator for facilitating communication between a plurality of (two or more) computers and computer peripheral devices ("computer products") in a local access network. The regenerator includes logic circuits that: (1) receives, processes and transmits an incoming message from a source computer product and ignores subsequently received incoming messages from other computer products until the first-received message is processed; (2) suppresses or ignores, for a predetermined punishment time interval, subsequent messages received from a source computer product, if temporal length of a message received from the source exceeds a predetermined protocol time interval; and (3) after the end of a message is received, determines when the lines of a network are all idle so that the regenerator can be re-activated to receive another incoming message from a computer product in the network.

US Patent:

62467182, Jun 12, 2001

Filed:

Nov 24, 1998

Appl. No.:

9/199113

Inventors:

Martin H. Graham - Berkely CA
Harold H. Webber - Lafayette CA

Assignee:

Tut Systems, Inc. - Pleasanton CA

International Classification:

H03K 708

US Classification:

375238

Abstract:

A method and apparatus for decoding a symbol, having a time duration indicative of a bit sequence and determined by first and second delimiters being with the detection of the first delimiter of the symbol on a carrier medium. A predetermined blanking interval is measured following detection of this first delimiter. Detection of the second delimiter on the carrier medium is prevented prior to expiration of the predetermined blanking interval. This is to prevent the detection of reflections resulting from the propagation of the first delimiter over the carrier medium, and the incorrect identification of such reflections as the second delimiter of the symbol. The valid second delimiter of the symbol is then detected on a carrier medium subsequent to expiration of the predetermined blanking interval. A symbol, indicative of the bit sequence, is identified from a group of symbols based on the time duration between the respective detections of the first and second delimiters.

US Patent:

59635959, Oct 5, 1999

Filed:

Sep 8, 1997

Appl. No.:

8/925205

Inventors:

Martin H. Graham - Berkely CA
Harold H. Webber - Lafayette CA

Assignee:

Tut Systems, Inc. - Pleasant Hill CA

International Classification:

H03K 708

US Classification:

375238

Abstract:

A method and apparatus for encoding a bit sequence as a symbol, suitable for transmission over POTS wiring, are described. The symbol has a duration indicative of the bit sequence, this time duration be determined by first and second delimiters. The method commences upon the receipt of a bit sequence at an encoder. Thereafter, a symbol, having a duration indicative of the bit sequence, is identified. The symbol is characterized in that it includes a buffer portion and an encoding portion. The buffer portion is of sufficient duration to allow reflections, generated by propagation of the first delimiter of the symbol on the POTS wiring, to decay to a predetermined level before propagation of the second delimiter.

US Patent:

55770231, Nov 19, 1996

Filed:

Aug 6, 1993

Appl. No.:

8/103395

Inventors:

John Marum - Oakland CA
Harold H. Webber - Berkeley CA

Assignee:

Farallon Computing, Inc. - Alameda CA

International Classification:

H04L 122

US Classification:

370 16

Abstract:

The present invention provides automatic configuration of the transmit and receive paths of a network connection, preferably a 10Base-T network connection. It senses which pair in a cable is used for TX signals and which is used for RX signals, then it automatically swaps or unswaps the RX and TX pairs of the port so that a connection is made regardless of whether a crossover or straight-through cable is used. The invention uses link integrity pulses, which are used to periodically test the integrity of the network, to determine which pair is for reception and which is for transmission. Since the auto-crossover transceiver has line receivers and line drivers connected to both pairs of the cable, once it determines which pair is TX and which is RX, it selects the appropriate line receiver and driver to match the cable configuration. The present invention allows connection to a network where another node on the network is either of the standard "hub" type, of the standard "MAU" type, or of the auto-crossover type.