hurf@batcomputer.tn.cornell.edu (Hurf Sheldon) (01/07/88)
Some time ago I asked for reccomendations for a high speed
(>=4800baud) modem or line driver that would be compatible with
a dedicated line that the phone company provided. The leased line
had, for distance and logistical reasons, to be a "loaded" or "3002" line,
which means it goes thru the phone company switching equipment
and has phone co line voltage on it.
We searched around quite a lot and ended up settling on the
Gandalf 419 LDM (which was the only reccomendation we got for this
type of equipment - from Jim Lowe at UWisc). It seems many people in
the phone company and the modem business are unfamiliar with this type
application. Several modem companies had 'engineers' answering their
phones that did not know about it and one - the 'dark cube' company -
had a chap who told me, rather forcefully, it couldn't be done!
It turns out NEC and Gandalf both make nice units that will run
a single 9600 line or mux 2 4800 lines. The Gandalf was 40% cheaper
and just worked when it was plugged in. Concise instructions, too.
We have one of their TD mux's. Their stuff is impressive, very reasonably
priced, and the people I spoke with knew immediately what we were doing.
Hurf Sheldon
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