[mod.telecom] Racal-Vadic VA4224

malloy@ittral.UUCP (10/15/85)

Does anyone out there have Racal Vadic VA 4224 modems installed and
running?  We currently have 3 3481's modems (actually 6, but only 3
phone lines).  Our major USENET connection `ittatc' in CT has USR
Robotics 2400's.  However we'd like to stick to our rack mounts, thus
the 4224's.  Those of you with a bunch of normal modems stacked on top
of each other, can probably appreciate why we wish to stick with our
modem rack.  (easier to use, especially for debugging) It turned out
extremely useful while getting 4.2 to talk to our modems.  The
distributed Racal-Vadic code for 4.2 just plain doesn't work.

The 4224's are rack-mounted fitting in the Racal-Vadic modem rack
along with our VA3481 (triple VA 3400, 212, 103) modems and VA831
auto-dailer.  I would particularly like to know if someone knows if
the infamous "Rockwell chip set" problem has been fixed.  I'd also
like to know how easy they are to install if someone else has already
done it.  In particular the 4224 comes WITH an auto-dailer built-in.
Can we just ignore it and use the VA831?  If not, does anyone know how
to auto-dial them?  I.e. are they compatible with anything?

I'll send a summary of replies (if any) to anyone who's interested.
Also if we actually get to buy these modems, I'll let you know how the
installation goes.

=William P. Malloy

p.s. Interesting point.  These suckers talk (2400/1200/300) but the
protocols supported are (V.22/212/103).  Note: Vadic 3400 protocol is
not supported!

-- Address: William P. Malloy, ITT Telecom, B & CC Engineering Group,
Raleigh NC
         {ihnp4!mcnc, burl, ncsu, decvax!ittvax}!ittral!malloy