Conferencing system for distributed switching network

Details Conferencing system for distributed switching network Conferencing system for distributed switching network

1991-09-26

1995-01-03

Dwyer, James L.

Multiplex communications

Wide area network

Packet switching

379202, 379204, 379269, H04Q 1104, H04M 342, H04M 300

Patent

active

053792807

ABSTRACT:
A conferencing device and method among terminals in a distributed digital telephone switching system is provided. The telephone switching system has a plurality of switching elements for interconnecting telephone units and telephone lines via communication links. A duplex path is set between each party in the conference and a designated bridge port. The speech from all the parties in the conference is summed and at the bridge port the sum is sent back to all engaged in the conference. As each party receives the sum, it subtracts its own speech data and therefore obtains the speech data from the other parties in the conference.

REFERENCES:
patent: 4173713 (1979-11-01), Giesken et al.
patent: 4201889 (1980-05-01), Lawrence et al.
patent: 4201891 (1980-05-01), Lawrence et al.
patent: 4317962 (1982-03-01), Cox et al.
patent: 4817085 (1989-03-01), De Prycker
patent: 4825433 (1989-04-01), Deschaine
patent: 4903260 (1990-02-01), Boettle et al.
patent: 4916690 (1990-04-01), Barri
patent: 4998275 (1991-03-01), Braunstein et al.
patent: 5127001 (1992-06-01), Steagall et al.
patent: 5276678 (1994-01-01), Hendrickson et al.
"Implementation of a 16 to 16 Switching Element for ATM Exchanges," by P. Barri et al., IEEE Journal on Selected Areas in Communications, vol. 9, No. 5, pp. 751-757 (Jun. 1991).
"Effects of Output Buffer Sharing on Buffer Requirements in an ATDM Packet Switch," by A. E. Eckberg et al., AT&T Bell Laboratories, Holmdel, New Jersey 07733, pp. 459-465 (IEEE 1988).
"Metastability Behavior of CMOS ASIC Flip-Flops in Theory and Tests", by Jens U. Horstmann et al., IEEE Journal of Solid-State Circuits, vol. 24, No. 1 pp. 146-157 (Feb. 1989).
"Input v. Output Queueing on a Space-Division Packet Switch," by Mark J. Karol et al., IEEE Global Telecommunications Conference, Conference Record, vol. 2, Session 19.4, pp. 659-665 (Dec. 1986).
"Metastable Behavior in Digital Systems," by Lindsay Kleeman et al., IEEE Design & Test of Computers, pp. 4-19 (Dec. 1987).
"A Shared Buffer Memory Switch for an ATM Exchange," by Hiroshi Kuwahara et al., pp. 118-122 (IEEE 1989).
"System 12: Review of the Fundamental Concepts," by R. Van Malderen, Electrical Communication, vol. 59, No. 1/2, pp. 20-28 (1985).
"Large-Scale ATM Multistage Switching Network with Shared Buffer Memory Switches," by Yoshito Sakurai et al., IEEE Communications, vol. 29, No. 1 pp. 90-96 (Jan. 1991).
"The Behavior of Flip-Flops Used as Synchronizers and Prediction of Their Failure Rate," by Harry J. M. Veendrick, IEEE Journal of Solid-State Circuits, vol. 1 SC-15, No. 2 pp. 169-176 (Feb. 1989).

Affiliated with

Also associated with

Rating

Conferencing system for distributed switching network does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Conferencing system for distributed switching network, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Conferencing system for distributed switching network will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2216503