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From: ciaraldi@rochester.UUCP
Newsgroups: comp.dcom.modems
Subject: Re: Dialin Recommendations?
Message-ID: <25830@rochester.ARPA>
Date: Wed, 11-Mar-87 22:41:33 EST
Article-I.D.: rocheste.25830
Posted: Wed Mar 11 22:41:33 1987
Date-Received: Fri, 13-Mar-87 00:59:36 EST
References: <25678@rochester.ARPA> <2742@well.UUCP>
Reply-To: ciaraldi@rochester.UUCP (Mike Ciaraldi)
Distribution: world
Organization: U of Rochester, CS Dept, Rochester, NY
Lines: 35
Keywords: Hayes 2400 power-up state

In article <2742@well.UUCP> rab@well.UUCP (Bob Bickford) writes:
>In a previous article Mike Ciaraldi writes:
>>Then they tried some Hayes-compatible 2400-bad modems,
>>but those had to be initiaized through software to make them
>>auto-answer, not send messages, etc.  This stuff has to be done,
>>but cant be done with switches (the Hayes 2400 doesn't have
>>switches like the 300 and 1200).  So, that would have to be sent out
>>the port when the system is powered up.
>
>  Not quite true.  The Hayes 2400 (at least, the ones I've
>worked with) has some EEPROM inside, and you can tell it to
>save it's current settings in that memory so it will come up
>in the right state if the power cycles.  This is why they felt
>they could delete the DIP switches.

Right you are!  This morning I got hold  of a real
Hayes manual, not the clone one I had used
(written in Japanese English).

The command  "AT&W" causes the current settings
to be written to non-volatile memory, where they become
the new default settings upon power-up or
initialization.  And the "AT&Dn" command can, among other
things, make the modem reset whenever DTR goes low,
which may be useful for modems that are both outgoing and incoming.

And finally, Hayes even includes a couple of pages with
recommendations for what settings to use for unattended
dial-in operation.  Oddly enough, they were the
same ones we had worked out by wading through the manual.

Thanks for the pointer, anyway.

Mike Ciaraldi
seismo!rochester!ciaraldi