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Modem Pins
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1985-12-04
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Path: puff!uwvax!harvard!talcott!panda!genrad!decvax!ittatc!dcdwest!
sdcsvax!sdcrdcf!randvax!kovacs!rivero
From: rivero@kovacs.UUCP (Michael Foster Rivero)
Subject: modem hookups
Date: 23 Nov 85 17:39:32 GMT
Organization: Robt Abel & Assoc, Hollywood
Thought I would pass this along to Amiga users wishing to
hook up a modem.
First off, check your Amiga users guide for the pinouts on
the rs-232 cable. There are a few non-standard pins that
carry voltage. These can ruin your modem and the Amiga itself
if you plug them in. CHECK THE AMIGA USERS GUIDE.
Next, pin 20 on the connector is supposed to carry a data-
terminal ready signal to tell the modem that you are on-line.
This would normally be +5 volts, but on the Amiga, there is no
such signal. In fact, the line tests out at -5 volts.
If your modem requires the DTR signal, then you should check
to see if it has a DTR bypass switch somewhere inside (mine
did), and switch it on. Otherwise, the modem will ignore the
Amiga.
I am posting this as I did not find any referances to the
DTR signal not being usable anywhere in the manuals.
Michael Rivero