Voice traffic capacity of a distributed PABX based on CSMA/CD LAN technology

Author

Dunlop, J. ; Lorimer, A.G.

Author_Institution

Dept. of Electron. & Electron. Eng., Strathclyde Univ., Glasgow, UK

fYear

1988

fDate

13-17 Jun 1988

Firstpage

231

Lastpage

234

Abstract

An examination is made of the feasibility of constructing a large distributed PABX by interconnecting a number of small (128-line) multiplexers using a CSMA/CD (carrier-shift multiaccess with collision detection) local area network. The multiplexers are themselves 128-line PABX modules capable of switching locally without reference to the network. A major problem with CSMA/CD for speech transmission is the inherent packetization delay which can considerably exceed the 2-ms delay normally specified by PTT authorities for subscriber premises networks (SPNs). The multiplexers tackle this problem by distributing packetization delay over several active sources. The choice of parameters to minimize delay as a function of throughput for the distributed PABX topology is considered

Keywords

carrier sense multiple access; local area networks; private telephone exchanges; CD; CSMA; LAN; carrier-shift multiaccess; collision detection; distributed PABX; local area network; multiplexers; packetization delay; Delay; LAN interconnection; Local area networks; Multiaccess communication; Multiplexing; Network topology; Road accidents; Speech; Telecommunication traffic; Throughput;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrotechnics, 1988. Conference Proceedings on Area Communication, EUROCON 88., 8th European Conference on

Conference_Location

Stockholm

Type

conf

DOI

10.1109/EURCON.1988.11146

Filename

11146