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PA2AGA > TCPDIG 04.04.97 21:04l 125 Lines 4884 Bytes #-10668 (0) @ EU
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Subj: TCP-Group Digest 97/29
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Date: Fri, 04 Apr 97 17:52:23 MET
Message-Id: <tcp_97_29>
From: pa2aga
To: tcp_broadcast@pa2aga-1
Subject: TCP-Group Digest 97/29
X-BBS-Msg-Type: B
TCP-Group Digest Fri, 4 Apr 97 Volume 97 : Issue 29
Today's Topics:
Happy birthday tcp-group
Send Replies or notes for publication to: <TCP-Group@UCSD.Edu>.
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Archives of past issues of the TCP-Group Digest are available
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Date: Thu, 03 Apr 1997 20:11:56 +0100
From: Jacques PHILIPPE <on4kjp@ibm.net>
Subject: Happy birthday tcp-group
Hello,
It's now ten years that this group projects to build a high speed tcpip
network on ham bands. See the archives at
(ftp://ftp.ucsd.edu/mailarchives/tcp-group)
The first step was made by Phil with it's NOS in ?1987. A bit later,
it was clear that tcpip will never work correctly over ax25, because tcpip
is end to end ack and ax25 badly protected against collision and noisy path.
The choose of ax25 over a collision noisy wireless path was one of the
stupidest things the world ever seen. That's what we, ham, have choosen ;-) ,
;-) , ;-) , ;-) , ;-) , ;-) , ;-)
If you dont agree, it means you are a tcpip beginner.
(To prove it, imagine a voice protocol over ax25 : everything stops for 5
or 10 seconds every time a frame is lost. And if you need to laugh, imagine
multi users game : the B player still plays while the game is already over
at other players).
Every year new hams come with their enthousiasm to tcpip, hoping to see
a fast tcpip network opening over ham bands. Like it takes sometime
(monthes ... years) to configure a tcpip station, the enthousiasm lasts a
while.
At the beginning, you think that the system is slow (very slow) because
of bad parameters or bad configuration. It takes me long ;-) to
understand that tcpip will never work correctly over ax25 if the link is
more than one hop (retry timout increase) or if somebody else is on the
same frequency (collision).
Some one or two percents of the remaining tcpip users, wants to find a
solution. There is one, it calls FEC (forward error correction). But
implementing FEC requires to make a new network with new protocols, new
transmitters, new modems, ... everything new. So the 0.01 percents of hams
understanding that ax25 is a dead end, try to convince the hamworld that
they must change everything to open ham to bright bleu future. The 99.99
percents dont even answer, too busy with the 7PLUS usage learning ! And
the 0.01 percent get bitter ;-) .
It's now ten years that new generations of tcpipers want to make a fast
tcpip network ... and then resign (see the calls and names of the writers
of this group over the years).
The first to experiment all this was Phil ! So if you want to know what
to do to start a fast tcpip network dont loose time, have a look at his
internet site.
Spread spectrum is certainly a nice stuf, but not for a multiple users
server. The only thing that will bring people back to HAMNET is a WIRELESS
Ethernet at 1 Mbits at least. This will allow, multiple digital voice
repeater, digital tv repeaters, conferences, network games (Doom), on
the Hamnet. The sofwares already exists on internet ...
Easy, isn't it ?
Nobody will be attracted by HTTP or FTP, Hamnet will never be able to
compeet with cheap Internet on these points.
Up to now, as far as I know, no FEC system are available. And all the fast
existing tcpip network still use ax25, they work because there are only two
users and one hop.
Thanks to all the writers, I spent nice time reading these groups.
Send me a mail when everything will be ok ;-)
73 de Jacques
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End of TCP-Group Digest V97 #29
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