Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: utzoo!mnetor!seismo!gatech!akgua!lcuxlm!whuxl!houxm!mtuxo!mtune!akguc!codas!peora!ucf-cs!novavax!houligan!dave@murphy.UUCP From: dave@murphy.UUCP (Lerxt) Newsgroups: net.unix-wizards Subject: Re: Arcane modem configuration Message-ID: <42@houligan.UUCP> Date: Thu, 4-Sep-86 18:33:20 EDT Article-I.D.: houligan.42 Posted: Thu Sep 4 18:33:20 1986 Date-Received: Sat, 6-Sep-86 22:56:45 EDT Organization: Gould Electronics, Ft. Lauderdale, Florida. Lines: 42 Relay-Version: version B 2.10.1 6/24/83; site houligan.UUCP Path: houligan!novavax!ucf-cs!peora!codas!akguc!akgua!gatech!seismo!brl-adm!brl-smoke!gwyn From: gwyn@brl-smoke.UUCP Newsgroups: net.unix-wizards,net.unix Subject: Re: Arcane modem configuration (was Re: Modems on Ultrix) Message-ID: <3254@brl-smoke.ARPA> Date: Fri, 22-Aug-86 17:48:21 EDT Article-I.D.: brl-smok.3254 Posted: Fri Aug 22 17:48:21 1986 Date-Received: Fri, 29-Aug-86 04:40:08 EDT References: <282@cirl.UUCP> <3030@umcp-cs.UUCP> Reply-To: gwyn@brl.arpa (Doug Gwyn (VLD/VMB) ) Distribution: net Organization: Ballistic Research Lab (BRL), APG, MD. Lines: 6 Xref: peora net.unix-wizards:11004 net.unix:7195 In article <3254@brl-smoke.ARPA>, gwyn@brl.arpa (Doug Gwyn (VLD/VMB) ) writes: >Chris Torek says that one can safely configure all terminal ports as >though modems were going to be attached, and he's right. I never >understood why some people keep trying to build the distinction >into their operating systems. If DTE acts like DTE and DCE acts >like DCE, everything works great. Simply jumpering the direct- >line terminal port cables correctly will suffice. Two problems with this: 1: Some older async interfaces, like the DZ11, do not have interrupts for the modem control lines, so the driver has to poll them. If you have 80 async ports and most of them are direct-connect, you probably don't want the driver polling all 80 of them for ring indicator continuously. 2: What about current-loop or other non-RS232 interfaces? --- "Pick it up and put it in your pocket, or somebody else will" - Stan Ridgeway Dave Cornutt, Gould Computer Systems, Ft. Lauderdale, FL UUCP: ...{sun,pur-ee,brl-bmd}!gould!dcornutt or ...!ucf-cs!novavax!houligan!dcornutt ARPA: wait a minute, I've almost got it... "The opinions expressed herein are not necessarily those of my employer, not necessarily mine, and probably not necessary."