Path: utzoo!utgpu!watserv1!maytag!xenitec!zswamp!root
From: root@zswamp.uucp (Geoffrey Welsh)
Newsgroups: comp.dcom.modems
Subject: Inside info on Telebit spoofing?!?
Message-ID: <7229.280E4283@zswamp.uucp>
Date: Thu, 18 Apr 91 18:26:59 PDT
Organization: Izot's Swamp BBS (FidoNet), Kitchener, Ontario

   Does anyone know what the data stream fed to the line looks like after a 
Telebit has gone into spoofing mode?

   I could imagine a Trailblazer stripping all the framing and providing the 
ACKs, and then sending the data into the PEP or MNP as if the host had simply 
done a binary dump to the serial port.  The receiving modem would take the 
raw data after the PEP/MNP processing and send it via UUCP-g to the receiving 
computer.

   This might not be the most elegant or safest approach, but it would mean 
easy inter-manufacturer compatibility.  Data should remain safe, since MNP or 
LAP-M would be entrusted with delivering the binary data verbatim, and each 
modem could take care of the protocol spoofing with its own home machine.

   This might also make it *theoretically* possible to tell machine A to send 
using Kermit and machine B to receive using XMODEM, since the data stream in 
between would be raw and spoofing would be a local issue only.

   Don't ask me how the modem is supposed to recognize the protocol if both 
ends don't interact enough to indicate a transfer reliably, this is just an 
uneducated dream. <grin>
 

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