Z-modem

Date: Fri, 6 Mar 1998 08:38:56 -0400 (AST)
From: David Potter <potter@csuite.ns.ca>
To: John Nemeth <jnemeth@cue.bc.ca>, csuite-tech <csuite-tech@chebucto.ns.ca>
Precedence: bulk
Return-Path: <csuite-tech-mml-owner@chebucto.ns.ca>

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Hi John... We've been puzzled by zmodem also...

DavidT's recently re-written the CSuite 'idled' to look for data sent as
well as data returned... He reports zmodem sending extended data streams
(perhaps after error checking on shorter streams...). These long
transmissions seem to have been fooling the old 'idled' into thinking the
session was idle (and booting users off the system.) Now we look for both
data in and out during the idle period, but after we warn the user we only
look for data/keystrokes back from the user. This is not yet in the
distribution... it needs to be cleaned up a little...

Ed Dyer (our postmaster and zmodem checker outer...) reports that zmodem
will fail, drop him back to the download screen and that he has been able
to successfully re-start/complete the download with kermit. DavidT
hypothesized that, with extended data streams, if zmodem gets an error at
the end of the transmission it may decide there's nothing to do but
re-start the whole thing ...while kermit is picking up errors (and
resending packets) as is goes along...

Lot's of hypothesis here... I'll see if I can track down the author...
(just something else on my list...)  


david potter



On Thu, 5 Mar 1998, John Nemeth wrote:

>      We've had a number of complaints about problems with our z-modem
> file transfer software, which didn't come with CSuite.  Can anybody
> tell me where to get a good version of z-modem that is free?  Failing
> that, what are the recommendations for commercial versions?
> 

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