Michael B Mccormack

US Patent:

6483203, Nov 19, 2002

Filed:

Jun 8, 2000

Appl. No.:

09/590565

Inventors:

Michael S. McCormack - Gloucester MA

Assignee:

3Com Corporation - Santa Clara CA

International Classification:

H02J 300

US Classification:

307 17, 307 83

Abstract:

A transformer unit includes a first isolation transformer, a second isolation transformer and a power transformer. A single package incorporates the first isolation transformer, the second isolation transformer and the power transformer. A plurality of connection pins provide connections to the first isolation transformer, to the second isolation transformer and to the power transformer. A process is also provided for connecting transmission lines to a network device including providing transmission lines carrying an electrical supply current, sufficient to power the network device, concurrently with a network data signal. The single unit has the first integrated isolation transformer the second integrated isolation transformer and the power transformer. Some of the transmission lines are connected to the first isolation transformer to isolate transmission signals on the sending transmission lines from a transmitter of the network device. Some other transmission lines are connected to the second isolation transformer to isolate transmission signals on the receiving transmission lines from a receiver of the device.

US Patent:

6535983, Mar 18, 2003

Filed:

Nov 8, 1999

Appl. No.:

09/435722

Inventors:

Michael S. McCormack - Gloucester MA
Paul Francis Dryer - Medway MA
Nicholas Mark Stapleton - Uxbridge, GB

Assignee:

3Com Corporation - Santa Clara CA

International Classification:

G06F 126

US Classification:

713310, 370410, 710 15

Abstract:

According to the invention, an Ethernet system and method of using an Ethernet system is provided including a network side device (a hub/switch/concentrator), and a plurality of end devices (either a standard end device powered locally or a system powered device), connected to the hub/switch. The system powered devices have circuitry for indicating the system power need to the hub, which has a power source for selectively supplying system power over the Ethernet. A stimulus device associated with the network device sends a stimulus signal over the network connection lines during a detection phase. The need for power is signaled by an indication device associated with the system powered end devices, providing an indication signal in response to the stimulus signal. A detector associated with the network side detects the indication signal thus triggering the power source to supply system power to each of the end devices that is a system powered device and not to each of the end devices that is a standard device.

US Patent:

6612856, Sep 2, 2003

Filed:

Dec 17, 2001

Appl. No.:

10/023009

Inventors:

Michael Sean McCormack - Gloucester MA

Assignee:

3Com Corporation - Santa Clara CA

International Classification:

H01R 2900

US Classification:

439188, 439676, 439108, 200 511

Abstract:

A connector assembly for protecting against cable discharge with respect to static charges that may accumulate on cables and other conductors. The connector assembly comprises a modular plug that mates with a modular jack. The modular jack comprises a plurality of resilient contacts that connect to rigid contacts on the modular plug when the plug and jack mate. The modular jack also supports a grounding conductor such that the jack contacts connect to ground when the jack and plug are unmated. As the plug and jack begin to mate, the jack contacts connect a ground potential to the plug contacts, thereby discharging to ground any static charge that may be stored on the cable. As the jack and plug continue to mate, the plug contacts disconnect the jack contacts from the grounding conductor. When the jack fully mates with the plug, cable conductors connect to an electronic circuit via the jack and plug contacts. The grounded contacts of a jack will steadily prevent charges from accumulating on cables or other conductors connected to the jack as long as the jack remains unmated.

US Patent:

6674844, Jan 6, 2004

Filed:

Jun 18, 2001

Appl. No.:

09/883892

Inventors:

Paul Dryer - Andover MA
Michael S. McCormack - Gloucester MA
Steve Weeks - N. Andover MA

Assignee:

3Com Corporation - Santa Clara CA

International Classification:

H04M 1100

US Classification:

379 9305, 379 9001, 37916701, 37939901, 359152

Abstract:

A telephone set of a telephone system is provided with an infrared interface. This infrared interface is able to communicate with an infrared port on a local computer. The computer is configured to send data to the infrared port, and receive data from the infrared port, in the same manner as if the computer was sending and receiving data over a telephone system. The telephone circuitry in the telephone system receives the infrared data and converts the infrared data into a format for transmitting across the telephone system.

US Patent:

6735297, May 11, 2004

Filed:

Jan 12, 2001

Appl. No.:

09/760520

Inventors:

Michael S. McCormack - Gloucester MA
Paul Dryer - Andover MA

Assignee:

3Com Corporation - Santa Clara CA

International Classification:

H04M 700

US Classification:

37922106, 705 59

Abstract:

A programmable telephone system including system software and system hardware. The system software includes instructions for operating the telephone system, and requires license information to operate. The system hardware includes a system specific memory and a system board. The system board executes the instructions of the system software. The system specific memory store is the license information and is separately replaceable from the system board in the system hardware.

US Patent:

6854015, Feb 8, 2005

Filed:

Feb 28, 2001

Appl. No.:

09/796398

Inventors:

Michael S. McCormack - Gloucester MA, US
Paul Dryer - Andover MA, US
Steve Weeks - North Andover MA, US

Assignee:

3Com Corporation - Santa Clara CA

International Classification:

G06F015/16

US Classification:

709227, 709222, 709228, 709250, 709234, 709238, 709239, 709244, 710106, 710300, 710301, 710309, 370389, 370445, 370462, 370463, 37916711, 37922101, 379 9314

Abstract:

A card, particularly a digital line card is provided for use with a chassis having a slot for receiving the digital line card. The chassis has an Ethernet bus for receiving packets from the line card and has a power supply and power strip for supplying power to the line card. The line card includes a public switched telephone network (PSTN) digital line input/output interface for sending digital signals over the PSTN and for receiving digital signals from PSTN. A line card control processor is connected to the digital line input/output interface. An Ethernet input/output is provided for sending packets over a local network corresponding to signals received from the telephone line and for receiving packets from the local network and forwarding received signals to the digital line input/output interface. The Ethernet input/output has a controllable backplane interface to the Ethernet bus including a switch normally active to direct data flow between the line card and the Ethernet bus, an Ethernet transceiver connectable to an Ethernet network, and an Ethernet link signal detector for detecting an Ethernet link signal at the Ethernet transceiver and deactivating the switch to isolate the line card from the Ethernet bus and to force data flow through the Ethernet transceiver. The card may also be part a network system with a chassis having a backplane Ethernet bus.

US Patent:

6963829, Nov 8, 2005

Filed:

Feb 8, 2001

Appl. No.:

09/779353

Inventors:

Angel Pino - Malden MA, US
Paul Dryer - Andover MA, US
Michael S. McCormack - Gloucester MA, US

Assignee:

3Com Corporation - Santa Clara CA

International Classification:

G06F009/455

US Classification:

703 25, 703 23, 703 24, 712 32, 712 35, 712 38

Abstract:

A bridge board connects a TMS470 processor evaluation module and a TMS320C54XX processor evaluation module. The bridge board performs translation of signal formats on both of the boards and also synchronizes the signal formats on both boards so that both boards are able to operate together. With this bridge board, and its specific connections to both of the evaluation modules, a single workstation, preferably connected to the TMS470 module is able to not only control the TMS470 module but also the TMS320 module. Software for the TMS320 can be loaded from the workstation through the TMS470 module, through the bridge board and into the TMS320 module. The software in both of the evaluation modules can then operate and interact with each other through the bridge board.

US Patent:

7076053, Jul 11, 2006

Filed:

Jan 12, 2001

Appl. No.:

09/760525

Inventors:

Michael S. McCormack - Gloucester MA, US
Paul Dryer - Andover MA, US

Assignee:

3Com Corporation - Marlborough MA

International Classification:

H04M 9/00
H04M 1/00

US Classification:

37938702, 379196, 379198, 379268, 379269, 370355

Abstract:

The PBX system includes an analog to digital, and digital to analog, (A/D) conversion where the sample size and the sample rate are selectively adjustable. The A/D structure includes registers which hold values indicating the sample size and the sample rate for the conversion. When the A/D structure is configured, the A/D structure reads the values in the register and configures itself to the sample rate and sample size indicated by the registers. When the sample size and sample rate is to be changed, the values in the registers are changed and the A/D structure is reconfigured.