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From: bill@bilver.UUCP (Bill Vermillion)
Newsgroups: comp.dcom.modems
Subject: Re: Passive modem?
Keywords: Modems Passive
Message-ID: <1335@bilver.UUCP>
Date: 12 Nov 90 04:13:44 GMT
References: <457@shum.huji.ac.il>
Reply-To: bill@bilver.UUCP (Bill Vermillion)
Organization: W. J. Vermillion - Winter Park, FL
Lines: 21

In article <457@shum.huji.ac.il> marx@vms.huji.ac.il writes:
>Is there a company that manufactures PASSIVE modem?
>When I say Passive modem I mean a modem that does not broadcast at all, only
>receive, this is useful for a third party to listen to the other two parties
>without making things messy.
>to make a long story short.
>A and B are speaking, C wants to hear, but C can't do that with a normal modem
>since a normal modem will respond to received broadcast. I want C only to listen.

C can't do that with a normal modem, if you mean the old style modem that
had no "smarts" as all.

If you have a "hayes" command set compatible modem set register C to 0 to
turn off the transmitter, then set S10 to 255 to ignore carrier status and
stay on line all the time, then a D or an A depending on which side of the
line you wish to monitor.   You need to monitor the side doing the echoing
so you can see what it sent, and what the other side transmitted.

-- 
Bill Vermillion - UUCP: uunet!tarpit!bilver!bill
                      : bill@bilver.UUCP