Path: utzoo!news-server.csri.toronto.edu!cs.utexas.edu!sdd.hp.com!wuarchive!udel!haven!mimsy!mojo!russotto From: russotto@eng.umd.edu (Matthew T. Russotto) Newsgroups: comp.dcom.modems Subject: Re: comp.dcom.modems lexicon Message-ID: <1991Mar7.030618.26337@eng.umd.edu> Date: 7 Mar 91 03:06:18 GMT References: <1991Mar5.225546.6672@panix.uucp> Sender: news@eng.umd.edu (C-News) Organization: College of Engineering, Maryversity of Uniland, College Park Lines: 31 In article <1991Mar5.225546.6672@panix.uucp> schuster@panix.uucp (Michael Schuster) writes: >In article em@dce.ie (Eamonn McManus) writes: >>[No change since last posting.] >> >>$Id: lexicon,v 1.0 91/02/01 16:47:06 em Exp $ >> >>Comp.dcom.modems lexicon, by Eamonn McManus . Contributions by: >> Charles Bryant >> Ronald S H Khoo >> David Lesher >> Chip Rosenthal >> Colin Plumb >> >>Full duplex. Able to send data in both directions at once. >> >>Half duplex. Able to send data in only one direction at a time. Some >> protocol is usually used to switch the direction as needed. >> > >Toby Nixon has stated on CompuServe that according to CCITT terminology, >"duplex" means transmitting simultaneously in both directions at the >same speed. Therefore "full duplex" is undefined and redundant. >(Toby, are you listening?) Half duplex has meant the definition above since the Early Days of Modems. (I've also seen it called "auto-simplex") -- Matthew T. Russotto russotto@eng.umd.edu russotto@wam.umd.edu .sig under construction, like the rest of this campus. I mine 600 wells, and whaddo I get? Another day older and deeper in debt! --- Saddam Hussein.