tnc's in the usa cost from 49.00 us to about 300.00 (these are prices for
a new one). all of them except one operate off of 12 vdc,all of them
can be used with computers from a 8086 up to the latest 686 versions,
they work best under dos. the one for $49 only works in a computer
with at least a 720k disk drive as it is software based..
i hope this helps
de bill n5dox
--- GEcho/386 1.11+
---------------