Path: utzoo!mnetor!uunet!lll-winken!lll-lcc!lll-tis!ames!hao!oddjob!gargoyle!ihnp4!homxb!whuts!mtune!westmark!dave
From: dave@westmark.UUCP (Dave Levenson)
Newsgroups: comp.dcom.modems
Subject: Re: Need info on Anderson Jacobson AJ1234
Message-ID: <114@westmark.UUCP>
Date: 23 Feb 88 13:39:26 GMT
References: <483@wa3wbu.UUCP> <25012@linus.UUCP>
Organization: Westmark, Inc., Warren, NJ, USA
Lines: 21
Keywords: Anderson Jacobson

In article <25012@linus.UUCP>, gwr@linus.UUCP (Gordon W. Ross) writes:
> I am looking for information about my Anderson Jacobson (model AJ1234)
> modem.  It has both an acoustic coupler and a direct connection
> ability,  but it does not seem to respond to a Bell 212 answer
> carrier.  I am hoping someone can find a user's manual for this
> anchor, or perhaps just tell me what this thing is.

The AJ 1234 (also sold as Racal-Vadic 34xx series) is incompatible
with the AT&T 212-compatible modems.  It will talk with other AJ or
RV modems.  It has the advantage (over the 212) that it is able to
work with an accoustic coupler.  It was designed for this
application, and uses a carrier frequency and modulation technique
that is insensitive to the distortion typical of a telephone
handset's carbon transmitter.  The 212-compatibles are not capable
of being accoustically coupled.  The problem with the AJ/RV modems
is that they never became a "standard".

-- 
Dave Levenson
Westmark, Inc.		A node for news.
Warren, NJ USA
{rutgers | clyde | mtune | ihnp4}!westmark!dave