Subj : Pure DOS TelNet ZMoDem
To   : NANCY BACKUS
From : MICHEL SAMSON
Date : Wed Oct 13 2004 07:45 pm

Hi Nancy,                               [Also posted in `FdN_Blue Wave']

     About "DOS TelNet U/L's by ZMoDem" of October 12:

NB> ...I wanted to let people know that my resident wizard managed to
NB> accomplish the impossible, and now I AM able to do zmodem uploads
NB> with my still totally DOS telnetting setup!!!
RB> ...peering at TCP packet traces and comparing them to the ZModem and
RB> TelNet documentation finally led me to realize the problem is caused
RB> by the TelNet IAC character (0xff).  ...TCPPORT doesn't escape the
RB> IAC character on sends.  It doesn't handle IAC sequences on receive
RB> very well either.  The ZModem part was working to specification...
NB> It works a lot faster than the kermit I had been using...  He's
NB> uploaded his program to Chowdanet...

     Thanks a lot for making an *EFFORT* to share such good news, Nancy!

                                  8^)

     Of course, you already know that i don't personally experience much
significant file transfer problems on the BBSes i keep visiting (since i
told you about my configurations based on `RLFossil' before), euh...  In
any case, i tested `TelNet Port v0.1' by Richard J. Backus yesterday and
i wish he had been a BBSer too when i mentioned the ~IAC~ issue in `FdN_
DOS-InterNet' many years ago!  8'-)  I know right now my test isn't fair
but i compared my cps rates and the `MS-Kermit' transfers are about 18 %
faster when i substitute `TNPort.EXE' to `RLFossil.EXE' - i say not fair
because, at 9K6 cps, euh...  i simply can't find a remote system (nor an
application) which will let me conduct an equivalent `ZMoDem' test under
a DOS environment!...  I tried telnet://guest.sailor.lib.md.us but there
is little hope since 'nix-like `ZMoDem' flavours are different about the
Return Character via ~TelNet~ protocol, if i'm not mistaking...  Well, i
observe that `{Commo}'/`ZMoDem' fails, anyway.  It would have been great
to read Richard when this was On-Topic and we had Ruurd Beerstra hanging
around in the now defunct `FdN_DOS-INet' echo, nonetheless!  :)  Please,
express a warm Thank You to your relative (brother, son or husband?)!...

     I tried to integrate `ZMoDem' and `MS-Kermit' together in `{Commo}'
but i've got no luck so far.  I know `Conex' does just that but then the
`Kermit' packet-size happens to be limited to less than 23 % of what the
official Columbia protocol allows, actually!...  I attempted a switch of
applications while my connection to the ~TelNet~ session was still "hot"
but there may be a problem regarding ~FOSSIL~ level-5 compliance;  there
isn't a lot more i can contribute with and, since you have it going, the
chances are that no such improvement really matters.  Nice try though!!!

                                    Salutations,  ;-)

                                    Michel Samson
                                    a/s Bicephale
                                    http://public.sogetel.net/bicephale/


P.S.:  Just in case, please mention Tim Strike's `FKFossil v1.02' to the
       attention of mister Backus.  The `Turbo Pascal' source-code isn't
       of much help as is (it's a client) but perhaps it will inspiring?


.... DOS+TCP/IP+TelNet+ZMoDem/Kermit+.QWK technologies with XTs or better
--- MultiMail/MS-DOS v0.45 - It could make TelNet OLMR BBSing UNIVERSAL!
 * Origin: BBS Networks @ www.bbsnets.com 808-839-6036 (1:10/345)

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