Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!wuarchive!wubios!phil
From: phil@wubios.wustl.edu (J. Philip Miller)
Newsgroups: comp.dcom.modems
Subject: Recording of Modem output
Message-ID: <1990Oct6.114313.9227@wubios.wustl.edu>
Date: 6 Oct 90 11:43:13 GMT
Sender: phil@wubios.wustl.edu (J. Philip Miller)
Organization: Division of Biostatistics, WUMS, St. Louis, MO
Lines: 31

[I posted this earlier, but don't think it left here -jpm]

I would like to know if it is possible to record the output of a modem and
later play it back into the modem and recover the original digital signal?
If so what black boxes (if any) do I need.

Here is what I want to do:

I am recording a number of chanels of analog data and I would like to add a
chanel of annotation about events occurring.  My idea was to connect a
computer to a modem and record its output.  Later, when playing the tape back
and doing A/D conversion I would listed on the com port of the computer to the
modem (now getting the output from the original recording) and recover the
information.

My recollection of the technology would suggest that it would be easiest to do
with the FSK of 300 baud modems (which would be plenty fast enough for my
application) technology.

Has anyone done this?  If so what did you have to do to connect the modem to a
recorder?  Since a phone line normally has a voltage, does one have to be
supplied?

thanks for any help with this.

-phil
-- 
     J. Philip Miller, Professor, Division of Biostatistics, Box 8067
	 Washington University Medical School, St. Louis MO 63110
	     phil@wubios.WUstl.edu - Internet  (314) 362-3617
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