Here's another website
http://www.eagleid.com/socket/) that's
offering the Cellsocket for only $55.00. In
the explanation, it notes that GSM calls by
alarm systems, etc. are fine and CDMA
sometimes have problems with the DTMF tones
getting through but the _DS7000 does not
send DTMF tones after the initial call
(unlike a "commercial" alarm system which
sends out status and other coded info via
DTMF tones after the connection is made.)
This same person offers a website for the
Dock n Talk, as well
(
http://www.eagleid.com/socket/). Most
importantly....they offer tech support for
both these units and appear to have some
experience!