Active8 says...

Someone else seems to think the T's aren't using DTMF. Does the
phone answer itself?

The B*s*c St*mp that decodes the DTMF cam also look for a ring
and answer the phone.

Terrorists hire engineers and technicians. Countermeasures that
any random sci.electronics.design participant can defeat are a
waste of effort.



--
Guy Macon, Electronics Engineer & Project Manager for hire.
Remember Doc Brown from the _Back to the Future_ movies? Do you
have an "impossible" engineering project that only someone like
Doc Brown can solve? My resume is at http://www.guymacon.com/