Electronic telephone system with time division multiplexed signa

Details Electronic telephone system with time division multiplexed signa Electronic telephone system with time division multiplexed signa

1977-12-05

1980-07-08

Brown, Thomas W.

Multiplex communications

Wide area network

Packet switching

179 18AD, 179 81C, 179 84VF, 370110, H04Q 130, H04Q 356

Patent

active

042118956

ABSTRACT:
An electronic telephone system has a plurality of extensions connected radially to a central equipment by respective cables each providing separate speech and signalling paths. Each of the signalling paths is provided by a balanced conductor pair terminated by a matching impedance at the extension unit. The conductor pairs are connected to a common control unit at the central equipment, which scans the extensions in a time-division multiplex mode, signalling data being transmitted over the conductor pair from the addressed extension to the control unit in a first period of the time slot allotted to the extension, and signalling data being transmitted from the control unit to the addressed extension in a second period of the allotted time slot. The system is also served by a number of trunks, which are scanned by the common control unit, the trunks being interfaced with the central equipment by interface units which include protective circuitry and logic control circuits.

REFERENCES:
patent: 3340366 (1967-09-01), Bour et al.
patent: 3701854 (1972-10-01), Anderson et al.
patent: 3828145 (1974-08-01), Carbrey
patent: 3843845 (1974-10-01), Ridley
patent: 3973085 (1976-08-01), Shiff
patent: 3996424 (1976-12-01), Agricola
patent: 4028498 (1977-06-01), Mehaffey et al.
patent: 4069399 (1978-01-01), Barrett et al.

Affiliated with

Also associated with

Rating

Electronic telephone system with time division multiplexed signa does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Electronic telephone system with time division multiplexed signa, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electronic telephone system with time division multiplexed signa will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-561444