Path: utzoo!utgpu!news-server.csri.toronto.edu!clyde.concordia.ca!uunet!hayes!tnixon
From: tnixon@hayes.uucp (Toby Nixon)
Newsgroups: comp.dcom.modems
Subject: Re: direct connection of two dte devices
Message-ID: <1806@hayes.uucp>
Date: 6 Oct 90 18:06:27 GMT
References: <129281@pyramid.pyramid.com>
Organization: Hayes Microcomputer Products, Norcross, GA
Lines: 40

In article <129281@pyramid.pyramid.com>,
lstowell@pyrnova.pyramid.com (Lon Stowell) writes: 

> Chop the extension cord in half, and then solder these pairs
> together...
> [deleted instructions to cross over wires and solder]
> If the modems are dial-up, there is no real way to just hook
> them together....

Sorry, you're just wrong here!  Modems do NOT care about the 
polarity of the Tip and Ring circuits.  You can plug two dial-up 
modems back to back with a standard male-to-male modular cord, give 
one an "ATD" command and the other "ATA", and they'll connect with 
each other just fine!  I do it all the time.

> BTW, why not just create a null-modem cable for the two DTE's
> and hook them together directly?

In my case, it is TOO MUCH TROUBLE to uncable all of my modems from 
my serial ports to hook up my Mac and PC together.  To connect their 
modems to each other, all I have to do is pull the T-connector out 
of the wall jack, and the two modems are left hooked together as I 
mentioned above. 

Of course, since they're both also connected to the Vax at 38,400, I 
usually just upload the file I want to transfer to the Vax and 
download it on the other machine.

I also on occassion in the past wanted to transfer files locally 
between machines, when on one of them I didn't have a regular serial 
port at all, but just an internal modem (and incompatible disk 
drives; such as transfer files from an IBM PC to an Apple IIc).

	-- Toby

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