RE: [SLUG] Null modem and phone cord

From: Ken Elliott (kelliott4@tampabay.rr.com)
Date: Sat Sep 18 2004 - 18:55:47 EDT


>>I'd like to know if it's possible to use a regular phone cord to have one
pc output to serial to another pc.

No. Telephone lines don't work like serial lines. A phone line consists of
two lines known as "tip" and "ring". The term comes from the old 1/4"
connectors. The "tip" wire went to the tip of the connector, and the "ring"
wire went to the "ring". Radio Shack sells a phone line emulator that lets
you connect two telephones to the box to check their operation, and it would
work with two modems. If I could find my old telephone hardware manual
(somewhere in one of these boxes) we might be able to construct an emulator.
That's way too much work.

But, if you are using external modems, you might be able to remove the
modems from the serial cables and hook the two serial cables together.
Might they both use a DB-25 connector at the modem end? If so, I believe
Radio Shack has a null modem adapter that will connect the "send" line of
one to the "receive" line of the other (and vice versa).

If both have an Ethernet port, it would be much easier and faster to connect
them to a hub or use a crossover Ethernet cable.

I assume your desire is to transfer data from your Mac to a PC. Is this a
one-time deal, occasional or frequent need to connect?

There's always the floppy disc option...

Ken Elliott

=====================
-----Original Message-----
From: slug@nks.net [mailto:slug@nks.net] On Behalf Of Russell Hires
Sent: Friday, September 17, 2004 11:02 PM
To: slug@nks.net
Subject: [SLUG] Null modem and phone cord

Hello all...

So here I am, trying to get my mac to output to serial (through the
modem) to my pc (through its modem)...using a regular phone cord. I don't
have a null modem cable, besides, I've got two different kinds of
hardware...they don't have the same type of connectors, though they do share
the modems and phone cord...

Both are running debian, and I know that I'm talking to the modem on each
machine, but I can't get the one to output to the other. Or if it is, I
can't tell...

I'd like to know if it's possible to use a regular phone cord to have one pc
output to serial to another pc. Can anyone help!

TIA

Russell

-----------------------------------------------------------------------
This list is provided as an unmoderated internet service by Networked
Knowledge Systems (NKS). Views and opinions expressed in messages posted
are those of the author and do not necessarily reflect the official policy
or position of NKS or any of its employees.

-----------------------------------------------------------------------
This list is provided as an unmoderated internet service by Networked
Knowledge Systems (NKS). Views and opinions expressed in messages
posted are those of the author and do not necessarily reflect the
official policy or position of NKS or any of its employees.



This archive was generated by hypermail 2.1.3 : Fri Aug 01 2014 - 17:49:39 EDT