Subj : Pure DOS TelNet ZMoDem
To   : MICHEL SAMSON
From : Stephen Hurd
Date : Sat Oct 16 2004 09:50 pm

  Re: Pure DOS TelNet ZMoDem
  By: MICHEL SAMSON to STEPHEN HURD on Sat Oct 16 2004 03:02:00

 >      In the good old days of TeleNet (not ~TelNet~), the users were able
 > to adjust `ZMoDem' (in a similar way as with `Kermit') but most terminal
 > emulators no longer give access to such long forgotten options and hence
 > the difficulties encountered by DialUp SoftWare using a ~TelNet~ "shim".

If the "telnet shim" properly handles IAC characters (ie: OS/2s VModem, COM/IP)
then there will be no problems unless the SysOp is using a buggy/broken ZModem
implementation.

If one end or the other does not properly handle IACs, neither ZModem nor a
non-escaped (and therefore slow) Kermit will work properly under these
conditions.  Essentially, ZModem (And Kermit, and XModem, and any other
transfer protocol on the planet that may send an ASCII 255 char ie: any 8-bit
protocol) will work if one of the following is true:

1) Both ends are broken.
2) Both ends work correctly.

If only one end works correctly, the protocol will fail.
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