Multiplex communications – Wide area network – Packet switching
Patent
1992-06-30
1993-04-06
Olms, Douglas W.
Multiplex communications
Wide area network
Packet switching
370124, 379202, H04M 356, H04Q 1102
Patent
active
052009513
ABSTRACT:
A method and apparatus for conducting a conference call among a plurality of subscriber stations. Each subscriber station contains a transmitter, a receiver, and an auxiliary receiver. An output of the auxiliary receiver can be selectively connected to an adding member that is located between a microphone and an input of the transmitter. The subscriber stations establishing the conference call connection form a transmission chain. Each subscriber station involved in the conference call, with the exception of the first subscriber station on the transmission chain, receive a user signal of a preceding subscriber station. The user signal of the preceding subscriber station is added to its own user signal to produce a compound signal that is transmitted to the next subscriber station on the transmission chain. A compound signal created in the last subscriber station of the transmission chain is supplied to the receiver of all the subscriber stations on the transmission chain. Each subscriber station can also function as a transition station to permit the making of a conference call to subscriber stations located on another transmission network. Various transmission mediums, such as a wireless system or a line-guided system, can be employed. If a line-guided transmission system is used, the transmitters and receivers of the subscriber stations are inductively coupled to the line.
REFERENCES:
patent: 3342944 (1967-09-01), Barbato et al.
patent: 3527889 (1970-09-01), Nennerfelt
patent: 4219699 (1980-08-01), Nilssen et al.
patent: 4339816 (1982-07-01), Reed
patent: 4706244 (1987-11-01), Watson et al.
patent: 4998243 (1991-03-01), Kao
Grau Alfred
Kupfer Hanspeter
Loder Max
Kizou H.
Olms Douglas W.
Siemens-Albis AG
LandOfFree
Apparatus and method for transmitting messages between a plurali does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Apparatus and method for transmitting messages between a plurali, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus and method for transmitting messages between a plurali will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-541812