Michael D Rauchwerk

US Patent:

20060221936, Oct 5, 2006

Filed:

Mar 31, 2005

Appl. No.:

11/096023

Inventors:

Michael Rauchwerk - Holmdel NJ, US

International Classification:

H04L 12/66
H04L 12/28
H04L 12/54
H04J 3/06

US Classification:

370352000, 370401000, 370428000, 370516000

Abstract:

Retraining of modems communicating data signals as voice signals via gateways over a packet network, such as a VoIP network, that does not communicate the sample clock of the transmitter to the receiver is eliminated by monitoring the buffer level in a receiving gateway, and adjusting the local clock as a function thereof, so that the long term average of the rate of incoming samples to the buffer is equal to the long term average rate of the codec clock which is used to clock samples out of the receiver buffer. Advantageously, there is no need to communicate clock synchronization information between the transmit and receive gateways. Further advantageously, only one gateway on the connection requires the functionality of the instant invention to be implemented therein.

US Patent:

56780591, Oct 14, 1997

Filed:

Feb 18, 1994

Appl. No.:

8/198743

Inventors:

Velraj Ramaswamy - Middletown NJ
Michael David Rauchwerk - Holmdel NJ

Assignee:

Lucent Technologies Inc. - Murray Hill NJ

International Classification:

G06F 1310

US Classification:

395821

Abstract:

A personal computer's microprocessor is time-shared to provide the functions formerly provided by a microprocessor dedicated to a modem. This technique is transparent to software applications programs which interact with a modem. The personal computer utilizes an operating system, such as the Microsoft Windows operating system, in which a portion of the operating system, known as the communications driver, provides the interface between the operating system and the personal computer's serial and parallel communication ports. All communications between the communications driver and the rest of the operating system are examined. Those communications destined for a particular port associated with a modem not having a dedicated microprocessor are redirected while other communications destined for other ports are passed to the Microsoft Windows communications driver. The redirected communications are coupled to a software application program which utilizes the PC microprocessor to carry out the functions formerly provided by the modem microprocessor. As a result, the modem's microprocessor and associated RAM and ROM can be eliminated.

US Patent:

50220535, Jun 4, 1991

Filed:

Apr 10, 1989

Appl. No.:

7/335257

Inventors:

Hong Y. Chung - Eatontown NJ
Michael D. Rauchwerk - Holmdel NJ

Assignee:

AT&T Bell Laboratories - Murray Hill NJ

International Classification:

H04J 1500
H04L 2734

US Classification:

375 39

Abstract:

Primary and secondary data are communicated from a transmitter to a receiver in a communication system. The value of an individual primary data word is communicated by transmitting an individual one of first plurality of channel symbols associated with that value while the value of a combined data word comprising an individual primary data word and an individual secondary data word is communicated by transmitting an individual one of second plurality of channel symbols associated with that value. In the receiver, both the primary and secondary data word values are recovered from the channel symbols thus transmitted. The approach of alternating two sets of channel symbols for transmission depending on the data word size can further apply to data communications at various fallback speeds.