Multiplex communications – Wide area network – Packet switching
Patent
1982-08-16
1984-12-04
Olms, Douglas W.
Multiplex communications
Wide area network
Packet switching
370 94, H04J 302
Patent
active
044868782
ABSTRACT:
Digital telephone exchange comprising a plurality of peripheral control domains PCD which are either connected to a digital trunk network DTN or are directly interconnected. Each domain comprises several digital subscriber interface units DSI, a group of digital subscriber sets SS being connected to each interface unit.
The transmission of information over the subscriber line is effected in a b-channel for speech (64 kb/s) a b'-channel for circuit-switched data (0/8/64 kb/s) and a .DELTA.-channel for packet-switched data (8/16 kb/s).
The subscriber line interface circuits SLIC comprise means (166) for identifying the packet-switched data signals and to apply them to a packet processing unit PPU. In this unit the packets are distinguished as firstly signalling information (s) and secondly telemetry and slow data (t+d'). The separately applied signalling information (s) and telemetry data and slow data (t+d') intended for a subscriber line are combined by the packet processing unit to form one packet-switched data signal (.DELTA.) for the subscriber line. In a data unit connected to the trunk network the signals S and (t+d') combined into messages are exchanged between the subscribers without loading the central control unit (CCU) of the telephone exchange.
REFERENCES:
patent: 4392222 (1983-07-01), Ando
patent: 4408323 (1983-10-01), Montgomery
patent: 4413337 (1983-11-01), Dauphin et al.
IEEE Transactions on Communications, vol. COM-24, No. 10, pp. 1089-1100, Oct. 1976, C. J. Jenny & K. Kummerle, "Distributed Processing Within An Integrated Circuit/Packet-Switching Node".
Naecon 1981, Proceedings of the IEEE 1981, National Aerospace & Electronics Conference, Dayton, OH, USA (19-21 May 1981), M. J. Ross, K. A. Garrigus, "A Distributed Processing Architecture For Voice/Data Switching".
ICC '80 1980 International Conference on Communications, Seattle, WA., USA (8-12 Jun. 1980), M. J. Ross, J. H. Gottshalck & E. A. Harrington, "An Architecture for a Flexible Integrated Voice/Data Switch".
Computer Design, vol. 15, No. 6, pp. 83-88, Jun. 1976, J de Smet & R. W. Sanders, "Pacuit Switching Combines Two Techniques in One Network".
Briody Thomas A.
Olms Douglas W.
Rokoff Kenneth I.
Streeter William J.
U.S. Philips Corporation
LandOfFree
Digital telephone exchange with means for processing packet-swit does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Digital telephone exchange with means for processing packet-swit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Digital telephone exchange with means for processing packet-swit will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1586364