For some people this is a REALY important feature.
There are places where the cheapest leased line service is 50X the 
cost of modem service ( $2400 vs $45 ).  ISDN is even *more* 
expensive than that.
Since I live in one of those places, any help from the people on this 
list wold be very valueble.  All I know so far is one word "EQL+".