Philip J Baun

US Patent:

48499773, Jul 18, 1989

Filed:

Aug 17, 1987

Appl. No.:

7/086013

Inventors:

Philip J. Baun - Andover MA
Joseph F. Carriere - Andover MA
Stephen K. Eng - Andover MA
Joseph E. Landry - Atkinson NH
Jonghee Lee - Seochotong, KP
Thomas M. Nolan - Windham NH
David C. Rhodes - Andover MA

Assignee:

American Telephone and Telegraph Company AT&T Bell Laboratories - Murray Hill NJ

International Classification:

G06F 1110

US Classification:

371 49

Abstract:

A channel bank unit for interfacing baseband user signals with a PCM carrier communications channel. The channel bank unit includes a circuit allowing verification of the transmission interity between the channel bank unit and external equipment having two-way communication with the channel bank unit. The circuit includes a first portion for evaluating the reception integrity of signals received from the external equipment and a second portion for imposing a parity sense on the signals transmitted to the external equipment that is related to the evaluation results of the first portion.

US Patent:

54955220, Feb 27, 1996

Filed:

Nov 7, 1994

Appl. No.:

8/335270

Inventors:

Bruce S. Allen - East Kingston NH
Marshall B. Garrison - Derry NH
Philip S. Brodsky - Methuen MA
Richard LeBlanc - Plaistow NH
Philip J. Baun - Andover MA
Gary R. McCarthy - Manachester NH
Arthur P. Leondires - Mont Vernon NH

Assignee:

MultiLink, Inc. - Andover MA

International Classification:

H04M 356

US Classification:

379202

Abstract:

An improved system for connecting and processing a plurality of phone user in a teleconference on a common digital bus. The apparatus includes a plurality of digital processing units (DSPs) associated with selective phone lines and in communication with each other. Each DSP determines an activity status for each associated phone line and transmits that status to the other DSPs, The DSPs create and update respective identical "talk-lists" which reflect the active conferees whose voice data is currently being output on the phone channels. The system thus provides scaleable teleconferencing in a real-time configuration without switching between the various signals on the common bus such that each incoming caller or even a plurality of conferences has equal priority.

US Patent:

43205054, Mar 16, 1982

Filed:

Jul 23, 1979

Appl. No.:

6/059759

Inventors:

Philip J. Baun - Andover MA
Thomas B. Merrick - Atkinson NH

Assignee:

Bell Telephone Laboratories, Incorporated - Murray Hill NJ

International Classification:

H04J 312

US Classification:

370110

Abstract:

A digital channel bank (11) has a plurality of channel units (17) interconnected to a digroup controller (10) over a shared data bus (30). A data processing circuit (FIG. 2) is included in each channel unit for the purpose of reducing the received signaling status information transmitted from each channel unit to the controller. The circuit (e. g. , gates 24-27) serves to prevent single bit errors from being recognized as changes in the received signaling state. The circuit (gate 28) also insures that only changes in the signaling status, rather than current status, are reported to the controller. The circuit also incorporates a predetermined amount of delay for the purpose of eliminating multiple messages to the controller when the A and B path signaling bits change in adjacent signaling frames.

US Patent:

58417630, Nov 24, 1998

Filed:

Jun 13, 1995

Appl. No.:

8/489742

Inventors:

Arthur P. Leondires - Mount Vernon NH
Bruce S. Allen - East Kingston NH
Marshall B. Garrison - Derry NH
Philip J. Baun - Andover MA

Assignee:

MultiLink, Inc. - Andover MA

International Classification:

H04L 1216
H04Q 1100

US Classification:

370260

Abstract:

A processor unit for a multipoint audio-video conferencing system, wherein the processor unit includes a host processor for controlling operation of the audio-video conferencing system. Controlling operation includes controlling the performance of a plurality of functions associated with servicing each of a plurality of communications connections, each of the connections being between a conferee terminal and the audio-video conferencing system. The processor unit also includes a plurality of digital signal processors, in communication with each other over a first bus and in communication with and controlled by the host processor over a second bus. Each digital signal processor includes an associated configuration element for adaptively configuring a selected digital signal processor to perform processing required by a selected one of the functions associated with servicing a selected one of the communications connections. The processing required by the conferencing functions is distributed between the plurality of digital signal processors.