home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
Columbia Kermit
/
kermit.zip
/
newsgroups
/
misc.19950726-19950929
/
000181_news@columbia.edu_Fri Aug 18 20:46:50 1995.msg
< prev
next >
Wrap
Internet Message Format
|
2020-01-01
|
3KB
Received: from apakabar.cc.columbia.edu by watsun.cc.columbia.edu with SMTP id AA01482
(5.65c+CU/IDA-1.4.4/HLK for <kermit.misc@watsun.cc.columbia.edu>); Sat, 19 Aug 1995 01:46:30 -0400
Received: by apakabar.cc.columbia.edu id AA20996
(5.65c+CU/IDA-1.4.4/HLK for kermit.misc@watsun); Sat, 19 Aug 1995 01:46:29 -0400
Path: news.columbia.edu!panix!news.mathworks.com!newsfeed.internetmci.com!news.sprintlink.net!in2.uu.net!nntp.hk.super.net!vassun0.macau.ctm.net!c9line9
From: cksam@macau.ctm.net (SAM, Chi-Kin)
Newsgroups: comp.protocols.kermit.misc
Subject: Re: Any experience with international file transfer over noisy lines?
Date: Fri, 18 Aug 95 20:46:50 GMT
Organization: Tecnologia Electronica Hermes
Lines: 53
Message-Id: <412u7q$gvc_001@macau.ctm.net>
References: <40q4ct$keh@homer.alpha.net>
Reply-To: bmasters@execpc.com
Nntp-Posting-Host: c9line9.macau.ctm.net
X-Newsreader: News Xpress Version 1.0 Beta #4
Apparently-To: kermit.misc@watsun.cc.columbia.edu
In article <40q4ct$keh@homer.alpha.net>,
Bill Masters <bmasters@execpc.com> wrote:
>
>Howdy out there in Kermit land ...
>
>Our company is experimenting with file transfer (specifically CAD drawings)
to a location in
>India. Unfortunately the lines over there seem to be pretty noisy. We either
have the line dropped
>during the call or, more frequently (always, so far) we have nad no luck
getting , for instance,
>Zmodem to actually successfully transfer, always seems to time out, bad CRCs.
I figure the noise
>at that distance is causing this.
>
>Does anyone have any experience with this? Are there better methods/protocols
(Kermit?) that can
>be used?
>
>BTW: I've looked for but can't find any other newsgroups on modems and file
transfer protocols.
>Any better place to post?
>
>Thanks in advance.
>
>In great humbleness,
>
>Bill Masters
>(bmasters@execpc.com)
>
>
I have this kind of experience. Few years ago. I once download files for more
the 20Mins from USA to here in South Asia.
First you need a first a pair of top quality modem at both ends, so that your
line would not be dropped. Then try to use Kermit as the start point, I prefer
version from U of columbia than other kermit protocal bundled with comm.
program, as those bundled sometime lack of the facilities to aloow fine tune
the performace. First start with short packet (96), windows as 1, then try to
increse the packet lengh. After determine the best packet length, try to find
the best windows size. Than I would come back to try to modify the
packet-length to increase the though put. Windows size play a important factor
on trought put of long haul international link. I would use Zmodem on
connection(s) known with good quality of line.
---SAM
====================================================================
SAM, Chi-Kin (Mr.) at Hermes Electronics Technology Co. in MACAU
Tel: +(853) 963609 Fax: +(853) 511456
e-mail: cksam@macau.ctm.net AT&Tmail: !hermestech
====================================================================