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.
Method And Apparatus For Installing An Access Point Over An Electronic Wall Box
Patrick J. Wallace - San Jose CA, US Daran G. Hermans - San Jose CA, US John R. Marum - Oakland CA, US Harold H. Webber - Lafayette CA, US
Assignee:
SYMBOL TECHNOLOGIES, INC. - Schaumburg IL
International Classification:
H01R 13/60 H01R 43/00
US Classification:
439535, 29825
Abstract:
An access point which is installed over the standard electronic wall box and provides access to different types of existing cables in a standard electronic wall box is disclosed. The access point includes at least one pass-through slot which houses a pass-through port. The pass-through port supports different types of connectors for different types of cables installed in the standard electronic wall box. The pass-through slot is used to expose the different types of connectors on the access point. The access point also includes a connection port to connect the access point to a wall cable which is a network uplink cable for connecting the access point to a network. The access point further includes an expansion slot to connect an expansion module to the access point. When the access point is installed on the standard electronic wall box, the pass-through slot is used to expose a cable that is different from the wall cable.
Method And Apparatus For Connecting Nodes For A Computer Network
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).
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.
Method And Apparatus For Detecting Collisions On A Network
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.
Signal Regenerator For Two-Wire Local Area Network
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.
Method And Apparatus For Decoding A Bit Sequence For Transmission Over Pots Wiring
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.
Method And Apparatus For Encoding And Decoding A Bit Sequence For Transmission Over Pots Wiring
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.