[GreenKeys] Fw: [Bulk] Re: Acoustic Coupler

[Jack]

Back in those days (1970's) it was "Data Access
Arrangement"..."digital" was not a
common term.  




-----Original Message-----
From: greenkeys-bounces at mailman.qth.net
[mailto:greenkeys-bounces at mailman.qth.net] On Behalf Of Paul A.
Pennington
Sent: Sunday, October 16, 2011 8:14 PM
To: greenkeys at qth.net
Subject: Re: [GreenKeys] Fw: [Bulk] Re: Acoustic Coupler

DAA stands for Digital Access Arrangement.  It's the interface from
your acoustic coupler to the phone line.  Used to be provided by the
phone co. for big bucks.  Someone here can probably tell you how to
simulate one and what the connector pinout is.

Paul Pennington
Augusta, Georgia

  ----- Original Message ----- 
  From: Larry Tighe 
  To: Greenkeys Greenkeys 
  Sent: Sunday, October 16, 2011 5:20 PM
  Subject: [GreenKeys] Fw: [Bulk] Re: Acoustic Coupler



  ----- Original Message ----- 
  From: "Larry Tighe" <larryradio at att.net>
  To: <gfmurphy at earthlink.net>
  Sent: Sunday, October 16, 2011 5:19 PM
  Subject: Re: [Bulk] Re: [GreenKeys] Acoustic Coupler


  > HI Jerry,
  >
  > I screwed up calling it a telex...it's a TWX.  It's a Model 33ASR
running 
  > at 20 ma.
  >
  > The loop keying device that should be with the AJ was not there so
I'm 
  > using a Black Box CL-51A.  That box has RS 232 in and out to key
the loop 
  > and when the KB keys the loop, it comes out of the Black Box as RS
232.
  >
  > Problem seems to be that the AJ acoustic coupler has a Molex
connector 
  > labeled DAA.  Nothing came with the machine to go into that.
There are 
  > only 4 pins active on that Molex but, so far, I don't know what
they're 
  > for.
  >
  > I'm using a 181720 power supply that gives me 80 volts at 20 ma.
for the 
  > Black Box to key for loop....works fine.
  >
  > So, I think the problems are narrowed down to DAA.
  >
  > lar

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