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000117_news@columbia.edu_Fri Jan 6 16:49:06 1995.msg
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Newsgroups: comp.protocols.kermit.misc
Path: news.columbia.edu!panix!news.mathworks.com!udel!gatech!howland.reston.ans.net!ix.netcom.com!netcom.com!kientzle
From: kientzle@netcom.com
Subject: Re: BLOCKS & Error Checking?
Message-Id: <kientzleD1ztDu.HEB@netcom.com>
Organization: NETCOM On-line Communication Services (408 261-4700 guest)
References: <3eioh1$3at@usenet.ucs.indiana.edu>
Date: Fri, 6 Jan 1995 16:49:06 GMT
Lines: 28
Apparently-To: kermit.misc@watsun.cc.columbia.edu
In article <3eioh1$3at@usenet.ucs.indiana.edu>,
Jeff Warrick <jawarric@ucs.indiana.edu> wrote:
>1) What are blocks? As I set packet lengths to 4096 and higher, it
>reminds me to set block check to 2 or 3. Can someone tell me what block
>check is?
>
>2) My modem software has a Checksum setting - single, double, or CRC.
>My kermit program doesn't have a corresponding setting. What's the deal?
`Block' and `packet' are synonyms. They're interchangable.
The `checksum' setting in your modem software is the same as the
`block check' setting in the Kermit program. Here's the correspondence:
single checksum -> block check 1
double checksum -> block check 2
CRC -> block check 3
Generally, if you're playing with long packets, you should always
use CRC/block check 3.
>3) Ever since I started playing with my settings to get *useable*
>results, my transfer quits after 1 error. Is this because of the long
>packet lengths?
If your software supports it (many don't), setting a window size
of 8 or 16 with 1k or 2k packets is typically faster than trying to
use very long packets. Dunno why your transfer would quit after 1 error.
If you want good Kermit performance, you might consider getting a copy
of MS-Kermit for your PC.
- Tim Kientzle