Article View: tor.uucp
Article #7Re: uucico w/v32bis vs zmodem w/v32bis
From: Marc Fournier - Sys Admin
Date: Thu, 10 Sep 1992 14:01
Date: Thu, 10 Sep 1992 14:01
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In article <1992Sep9.155143.24351@crd.ge.com> davidsen@crd.ge.com (bill davidsen) writes: >In article <1992Sep2.223307.29625@terminator.cc.umich.edu>, honey@citi.umich.edu (Peter Honeyman) writes: >| william E Davidsen writes: >| |> Greater packet overhead, I suspect. Are you using uucp spoofing to >| |> eliminate sending all the overhead on the wire? S111. >| >| this perpetuates a myth regarding telebit uucp spoofing. it is >| false. the 'g' headers are *not* stripped, they are sent from one >| modem to the next. > > Can you expand on that? From stats I keep I see an improvement in >performance using spoofing, so I'm not sure exactly how this "myth" >influences my numbers. My reading of the Telebit info leads me to >believe that the acks are locally generated, never sent between modems, >and that parts of the headers are compressed, fiddled, and/or stripped >such that they reduce the bits going over the wire. > > I willing to believe that Telebit might state something not true, or >that I might misread their description, but I find it hard to believe >that would confuse my scripts which read the data and tell me what's >happening for transfer rates. > My understanding is that 'g' spoofing gets rid of the need for the modem to send the 'acks' to the host, with the modem's themselves receiving and interpreting them. This helps increase the throughput by reducing the load on the modem<->computer connection because no 'acks' are being transmitted except from modem<->modem :) Marc -- Marc G. Fournier | R-node Public Access Unix running UnixBBS 1.03 Etobicoke, Ontario | 416-249-5366 24hrs 7 days/week network email voice: 249-4230 | shell/feed accounts available 1800+ newsgroups marc@r-node.pci.on.ca | Telebit T3000/SupraModem2400/Cardinal 2400 FREE
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Newsgroups: tor.uucp,ont.uucp,comp.dcom.modems,comp.unix.sysv386,comp.protocols.misc Path: arc1-ca.pugleaf.net!sparky!uunet!uunet.ca!geac!zooid!r-node!marc From: marc@r-node.gts.org (Marc Fournier - Sys Admin) Subject: Re: uucico w/v32bis vs zmodem w/v32bis Message-ID: <1992Sep10.140142.9479@r-node.gts.org> Organization: R-node Public Access UNIX System (416-249-5366) 24hrs. References: <1992Sep2.143752.15142@crd.ge.com> <1992Sep2.223307.29625@terminator.cc.umich.edu> <1992Sep9.155143.24351@crd.ge.com> Date: Thu, 10 Sep 1992 14:01:42 GMT Lines: 35