Re: Telnet and zmodem
  By: Michiel Broek to Rob Swindell on Mon Mar 06 2006 02:54 pm

 > Hi Rob,
 > 
 > it seems that the problems between syncterm and mbse are in the underlying
 > network part. Mbse uses the telnet links as 8 bit link, syncterm escapes
 > telnet control commands. I experimentyed with that too, but they two
 > programs still refuse to work together.

When downloading via Zmodem, the upstream packets are all in ASCII, so I don't
see how "escaping telnet control commands" in SyncTerm would
matter. Of course
SyncTerm expects the Telnet IAC character (ASCII 255) to be
"escaped", that's
how the Telnet protocol works. Is it this escaping of the IAC that you're
saying MBSE does *not* do?

 > I did some more testing and made the following matrix:
 > 
 > 
 >                 Mbsebbs       Synchronet    Concord      Mystic
 >                 ------------- ------------- ------------ -------------
 > Dynacom-8 win   Ok            Ok            Error        Aborted
 > mtelnet win     Ok            Ok            Ok           Ok
 > Minicom Lnx     Ok            Ok            Ok           Ok (crc errors)
 > Syncterm lnx    Error         Ok            Ok           Aborted
 > TeraTerm win    Ok            Error         Ok           Error
 > 
 > All were tested with a large download using normal zmodem.

Of course Synchronet doesn't have any built-in x/y/zmodem transfer protocols so
when you list "Synchronet" above, that's too vague to be useful.
Depending on
the BBS which you connected the sending Zmodem protocol driver could easily be
FDSZ, CEXYZ, [l]sz, or SEXYZ.

 > To me it seems there are probably tiny differences which break some
 > combinations. We may better not discuss Mystic, it's possible that there is
 > something wrong on the bbs side of that system, only mtelnet did ok without
 > errors, other programs finished ok with lots of crc errors or aborted on too
 > many crc errors.
 > 
 > Do you have any ideas what the real problem may be between these
 > incompatibilities?

Not without more details. :-(

                                                  digital man

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