rbrink@hubcap.clemson.edu (Rick Brink) (09/22/90)
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....
ropg@ooc.uva.nl (Rop Gonggrijp) (09/23/90)
rbrink@hubcap.clemson.edu (Rick Brink) writes: >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. From looking at you description I get the impression that this might be a very simple device that can take the phone off the hook from a command on the serial port. (Either a control wire or data). Could be handy when the receiver is always in an acoustic coupler.... No guarantees, just a sugges- tion.....
esmith@goofy.apple.com (Eric Smith) (09/23/90)
In article <10566@hubcap.clemson.edu> rbrink@hubcap.clemson.edu (Rick Brink) writes:
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.)
The Microcoupler was used with 300 baud modems Hayes made for the Apple II
and the S100 bus.
It is a DAA (data access arangement), a holdover from the days when you
couldn't connect just anything to your phone line. It is basically just
a telephone line interface. As someone else suggested, it will allow you
to take the phone on and off hook (which can also be used for pulse dialing).
I believe it also contains the 2 to 4 wire hybrid, so it has audio in
and out for a separate modem. It may also give a ring indication.
--
Eric L. Smith Opinions expressed herein do not necessarily reflect those
esmith@apple.com of my employer, friends, family, computer, or even me! :-)