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000116_news@columbia.edu_Fri Jan 6 16:56:49 1995.msg
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From: shair@uiuc.edu (Bob Shair)
Newsgroups: comp.protocols.kermit.misc
Subject: Re: BLOCKS & Error Checking?
Date: 6 Jan 1995 16:56:49 GMT
Organization: University of Illinois at Urbana
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jawarric@ucs.indiana.edu (Jeff Warrick) writes:
>I have a few questions. checked the tiny FAQ with no luck...
>SYSTEM: I type Wermit to run kermit, so I guess that is the specific
> kermit program on SCO Unix.
The provided makefile compiles Kermit source to "wermit", to give a test
version which won't overwrite the production "kermit". The System Admin
is supposed to rename it to "kermit" when satisfied with it.
> I use Crosstalk for Windows over a 14.4 modem.
>
>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 check is the same as Checksum.
Kermit Crosstalk
set block 1 checksum single
set block 2 checksum double
set block 3 checksum CRC
If they don't match, you'll get:
>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?
It could be, but non-matching Checksum parameters will cause it. I don't
know what parts of the Kermit protocol Crosstalk implements. When I used
to run Windows on my PC, I used MS-Kermit in a DOS Full-Screen session
as my terminal emulator. It was very compatible with the C-Kermit on
the Unix boxes, and was free! (Now running OS/2 so have C-Kermit at both
ends).
You'll have to check your Crosstalk documentation to see what it supports.
--
Bob Shair Open Systems Consultant
1018 W. Springfield Avenue shair@uiuc.edu
Champaign, IL 61821 217/356-2684