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From: bblue@crash.UUCP
Newsgroups: comp.dcom.modems
Subject: Re: Hayes command set oversight/problem
Message-ID: <834@crash.CTS.COM>
Date: Mon, 23-Feb-87 01:07:08 EST
Article-I.D.: crash.834
Posted: Mon Feb 23 01:07:08 1987
Date-Received: Wed, 25-Feb-87 06:39:02 EST
References: <871@basser.oz> <1144@sri-unix.ARPA> <2593@well.UUCP> <1210@steinmetz.steinmetz.UUCP>
Reply-To: bblue@crash.CTS.COM (Bill Blue)
Organization: Crash TS, El Cajon, CA
Lines: 23

In article <1210@steinmetz.steinmetz.UUCP> davidsen@kbsvax.UUCP (William E. Davidsen Jr) writes:
>
>Anyone who has a modem in answer mode and doesn't disable the
>ability of someone else to get in the modem command mode is
>ASKING for trouble. At the very least the caller could disable
>answer, taking the line out of service (and a bitch to find).
>There are other things to do, but I don't want to bring them to
>anyone's attention.

It's probably just as well, since what you're saying is not true -
at least not with correctly designed Hayes compatible modems. When you
do +++ as a caller, both modems will go into command mode - that much is
true.  However, using ATD or ATO (depending on your modem) to return to
terminal mode does not then allow you to talk to the remote modem's
command mode.  The remote modem, at that point, can do nothing but
detect lost carrier.  No commands you issue will affect it.

The high speed Telebit Trailblazer has a special mode that, when
enabled, *will* allow a calling Telebit modem to change settings on the
remote.  That's the only one I'm aware of, though.

--Bill		bblue@crash.CTS.COM
		{akgua, hplabs!hp-sdd, sdcsvax, nosc}!crash!bblue