Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!uunet!mcsun!hp4nl!tuegate.tue.nl!svin02!eba!ebh.eb.ele.tue.nl!wjw From: wjw@ebh.eb.ele.tue.nl (Willem Jan Withagen) Newsgroups: comp.sys.apollo Subject: Re: ADUS SysAdmin summary? Message-ID: <1198@eba.eb.ele.tue.nl> Date: 30 May 91 11:20:06 GMT References: <399@galileo.rtn.ca.boeing.com> <51d64a3b.3593b@digital.sps.mot.com> <51d75679.1bc5b@pisa.citi.umich.edu> Sender: news@eb.ele.tue.nl (The News system) Reply-To: wjw@eb.ele.tue.nl Organization: Digital Systems, Eindhoven University of Technology, the Netherlands Lines: 39 In article <51d75679.1bc5b@pisa.citi.umich.edu>, rees@pisa.citi.umich.edu (Jim Rees) writes: => In article <51d64a3b.3593b@digital.sps.mot.com>, chen@digital.sps.mot.com (Jinfu Chen) writes: => => Exactly! Software issues aside, HP doesn't even offer an ATR option on the => 700 series so for those of us who spent zillions dollars (or hours if your => boss is cheap) setting token ring cables, we couldn't hook up the 700 series => into our existing network even OSF/1 and DCE would have been available. => => Just curious -- has anyone tried running ethernet over existing token ring => cable? If you set it up as thinnet sections, and keep them short, it just => might work. Of course your taps will be at the wrong places, but I've been => amazed at what has worked around here in the past. => => My home Apollo ring is currently wired up with thinnet cable, and that works => fine. My 400dl doesn't have an ring-control, nor can it ever have it. Hence I'm using thinnet. We first tried to use one of the 92ohm arcnet cables, but the tried already implies the negative success. The we have this very thin, but still 50ohm coax in the wall. Nobody use it so we started using that. Currently my segment is 65m long, and in my room are 1 400dl and 2 PC-wd8003E card connected. This works, but measuring the lines tells that the ac and dc-resistance is already to big. (~>0.01 ohm) Trying to append another segment of 65m of this cable collapses the system. My apollo won't boot, the controller says that the controller has an error. An looking at the signals, things are really messy. So maybe thinnet can be used for a ring (What's the impedance of ring-cable) But a regular ethernet is much more nasty. Ciao, Willem Jan -- Eindhoven University of Technology DomainName: wjw@eb.ele.tue.nl Digital Systems Group, Room EH 10.10 P.O. 513 Tel: +31-40-473401 5600 MB Eindhoven The Netherlands