Try http://www.cmlmicro.co.uk/

----- Original Message -----
From: "Dale Botkin" <dale@BOTKIN.ORG>
To: <PICLIST@MITVMA.MIT.EDU>
Sent: Friday, October 27, 2000 7:38 PM
Subject: Modem suggestions


> Hi,
>
> I've got a project in the works that needs to dial out to a numeric pager
> (DTMF) and a host system (data).  I had originally looked at using a
> Cermetek modem, but the company is totally unresponsive to phone and email
> queries, and the only distributors I can find (Parallax and Arrow) want
> ***WAY*** too much money for a modem module.  The cheapest I found the
> low-end 1786NH was $71.00 for any quantity, which is way high considering
> Cermetek says they're under $30.  Xecom is way expensive, and Zilog's chip
> doesn't appear to be available in small quantities and requires a lot of
> external components and a DAA.
>
> So I designed the project with a DB25 to use a standalone modem.  It's
> iffy at best, and the init string has to be tailored for every modem, of
> course -- no problem for me, but the customer hasn't dealt with oddball
> modems for 20 years.  I'd look at using an ISA bus PC modem, but the
> project uses a lot of the 16F877's pins, no way there would be enough left
> over for that.  I'm not wild about the external modem, because there's no
> way for the PIC to know whether the modem is healthy or not, and no real
> way to reset it if it gets really screwed up and needs a power-on reset.
>
> So is there a reliable source for an embedded modem with DAA for under,
> say, US$40-50 or so, where I could buy one or two today (even for a little
> higher price) and know I could get 50-60 later on, or do I just need to
> keep hacking on the standalone modem interface and write off the
> single-chip modems?  Seems a shame that no reliable manufacturer makes
> those suckers.  If anyone's got a bright idea for a cheap *and* US-legal
> (or at least close to it and reliable) solution for this, I'm listening.
>
> Dale
> ---
> The most exciting phrase to hear in science, the one that heralds new
> discoveries, is not "Eureka!" (I found it!) but "That's funny ..."
>                 -- Isaac Asimov
>
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>
>
>

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