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From: rbrink@hubcap.clemson.edu (Rick Brink)
Newsgroups: sci.electronics
Subject: Identify device please?
Message-ID: <10566@hubcap.clemson.edu>
Date: 21 Sep 90 21:02:02 GMT
Organization: Clemson University, Clemson, SC
Lines: 21


I have a "black box" I picked up at a yard sale for a buck.  It's about
1"x3"x6", manufacturer: Hayes Microcomputer Products inc. and labeled:
microcoupler....off hook.  It has an RJ14 jack (4 wires), and a din 10 plug 
with a 5inch multicolor riboncable terminating in a db25 (mounted in a box
.75"x.75"x2.5" with flanges that look like they should fit a pc card opening.)

I called hayes, and they could not identify it.  The construction is pretty    
simple. 5 chips (GE 4n33 146; P137/DM7405N;2 x P8147B+/LM324N; CA30809E/RCA
- 145; )diods, a magnetic relay, a small matching transformer and a small
coil (microtran T8410.

Curiosity.  I grabbed it thinking it was a simple modem.  I didn't look closely
at it then, and now I don't know what it is.

Drop me a line if you have any ideas.

rbrink@hubcap.clemson.edu please, I don't get to long on often, but I read
mail daily.

thanks....