Path: utzoo!utgpu!news-server.csri.toronto.edu!mailrus!accuvax.nwu.edu!nucsrl!telecom-request From: Wm Randolph Franklin Newsgroups: comp.dcom.telecom Subject: Re: Complaint to Telco Brings Hostile Service Person! Message-ID: <12431@accuvax.nwu.edu> Date: 21 Sep 90 19:43:27 GMT Sender: news@accuvax.nwu.edu Organization: Rensselaer Polytechnic Institute, Troy NY Lines: 22 Approved: Telecom@eecs.nwu.edu X-Submissions-To: telecom@eecs.nwu.edu X-Administrivia-To: telecom-request@eecs.nwu.edu X-Telecom-Digest: Volume 10, Issue 666, Message 4 of 11 In article <12382@accuvax.nwu.edu> Norman Soley writes: >Once upon a time someone told me that the reason a data line costs >more was because a voice call used less bandwidth when it was >multiplexed with other calls on a trunk than a data call did. At least in the past on transatlantic lines, a form of time division multiplexing was used where you had a line only when talking. The result was that 1/20 second of so was clipped of the start of every phrase while the system was allocating you a new circuit. Therefore they had to make the first tone longer when transmitting a number. Is this still used, and where? Wm. Randolph Franklin Internet: wrf@ecse.rpi.edu (or @cs.rpi.edu) Bitnet: Wrfrankl@Rpitsmts Telephone: (518) 276-6077; Telex: 6716050 RPI TROU; Fax: (518) 276-6261 Paper: ECSE Dept., 6026 JEC, Rensselaer Polytechnic Inst, Troy NY, 12180