Just want to thank everyone who gave suggestions on modem security,
espcially Louis Erickson who provided not just one, but two ways to handle
the problem. It turned out that a firewall was not a good idea, and since
the calls are outgoing only the simple solution was to change the modem
initialization string to ATS0=0 so that it won't listen for incoming
calls. As a secondary measure I'm building a bridge rectifier assembly
which actually filters out the ring tone on that line. (Now is that some
nice overkill or what? *grin*) For those of you who are interested the
schematic diagram is at
http://home.attbi.com/~sabernet/papers/ringfilter.html
