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- Newsgroups: comp.dcom.modems
- Path: sparky!uunet!paladin.american.edu!gatech!destroyer!cs.ubc.ca!alberta!kakwa.ucs.ualberta.ca!acs.ucalgary.ca!clau
- From: clau@acs.ucalgary.ca (Christopher Lau)
- Subject: Re: Uploading to Internet (was Re: PPI modems...)
- Sender: news@acs.ucalgary.ca (USENET News System)
- Message-ID: <92Dec26.075244.18561@acs.ucalgary.ca>
- Date: Sat, 26 Dec 92 07:52:44 GMT
- References: <Dec.25.23.06.44.1992.5890@pilot.njin.net>
- Nntp-Posting-Host: acs5.acs.ucalgary.ca
- Organization: The University of Calgary, Alberta, Canada
- Lines: 49
-
- birchall@pilot.njin.net (Shag) writes:
- > jbuhler@owlnet.rice.edu (Jeremy Daniel Buhler) writes:
- >
- > >...the internet machine won't accept uploads at ANY speed, even
- > >2400 with EC and compression disabled and my local port locked at 2400.
- >
- > Odds are you're not connecting directly to the internet machine, but rather
- > are doing something like this:
- >
- > You <-> Your modem <-> Their modem <-> Terminal Server <-> Net <-> Machine.
- >
- > I have a situation exactly like this. The problem lies in the terminal
- > server. It is trained to watch for certain "escape codes" which will drop
- > you out of the Server <-> part of the connection so that you can establish
- > more connections or do something else. Crude multi-session computing. When
- > you start a transfer, the server "escape code" nearly always comes up
- > pretty quick, and the server decides that you want to do something else,
- > promptly yanking half of your connection route, so that the data flow is
- > interrupted.
- >
- > The fix? Tell the server you want "download mode" or something of that ilk.
- > The command for a CISCO server (what I deal with) is 'term download'. Other
- > brands would probably have similar commands, I'd suggest asking a telecom
- > person at your school what the command is for your particular setup.
-
-
- If you can't get your terminal server to go into a transparent mode and you're
- using zmodem, try it with the -e flag- this tells it to quote all control
- characters so they don't interfere with the terminal server. This almost
- always works (unless the terminal server escape code is alpha-numeric
- eg: "\server" or something similar), but unfortunately reduces your throughput
- by about 12-13% (assuming a flat distribution- 31 ctrl chars/256 possible ascii
- codes). Protocols like Kermit always quote control chars, and therefore work
- under almost any conditions, but since most are not streaming protocols, their
- effective throughput leaves much to be desired.
-
- > --
- > Shag | Operator, ShagNET | Editor of "Screaming in Digital"
- > birchall@pilot.njin.net | Rutgers / NJIN | The Queensryche E-mail Digest
- > birchall@njin.bitnet | dialup access for | queensryche-owner@pilot.njin.net
- > shag@most.other.places | Burlington County | Anything Queensryche, every week
-
-
- c4
- --
- Christopher Lau | Dammit Jim, I'm a doctor,
- The University of Calgary | not an engineer!
- Dept. of Electrical & Computer Engg. | Well, you're an engineer now..
- lau@enel.ucalgary.ca -OR- clau@acs.ucalgary.ca -OR- root@fusion.cuc.ab.ca
-