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)
