From: utzoo!decvax!harpo!floyd!cmcl2!edler
Newsgroups: net.dcom
Title: Anderson-Jacobson 1259 versus Racal-Vadic 3451P
Article-I.D.: cmcl2.10172
Posted: Thu Aug 12 20:23:55 1982
Received: Sun Aug 15 02:48:59 1982



A couple of weeks ago I asked for info on the differences between
the Racal-Vadic 3451P and the Anderson-Jacobson 1259.  I suppose I
should pass on whatever I discovered.  They are
apparently very similar, but not quite identical.  I have not
been able to examine and take apart an RV modem, but it is really
quite close.  Inside the AJ, the circuit boards say Anderson-
Jacobson, not Racal-Vadic.  The only functional difference I am
aware of is the lack of a switch on the AJ 1259 to prevent auto
answer; it will always answer if DTR is asserted.  Apparently
AJ has been manufacturing modems for RV for some time before
it came out with the 1259.  Also, AJ might be coming out with
a dialer for the 1259 that does both pulse and tone dialing,
and which you can install yourself.

Some people I heard from felt that the AJ would probably
not be as good as the RV.  In fact, there was nobody I heard from
that actually had any bad experience with an AJ 1259.  It does seem
that if you want to get an AJ 1259, you should be able to get a
cheaper price than the RV 3451P.

I have since gotten an AJ (because of long delivery delays on an
RV 3451P), and it seems to work fine.  I have had
only one problem, which is in answering calls from a 212 modem.
It only affects one particular 212 of three that I tried.  Originate
mode works fine to all 212's that I tried.  The single difficult 212
can originate calls to other 212's and to RV 3451P's.  I don't know
what to make of it, except to mention a possible contributing factor:
the unsuccessful phone calls are long distance.

In short, my attitude towards the AJ 1259 is that it is probably
acceptable as a substitute for the RV 3451P only if you can't
afford to wait for delivery of an RV.  Also, you might be able
to get a little better price.

	Jan Edler		cmcl2!edler	(nyu)
				pyuxll!jse	(btl piscataway)