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From: chaim@eniac.seas.upenn.edu (Chaim  Dworkin)
Newsgroups: comp.sys.dec.micro
Subject: DEC DF112-AA modem; How does it work?
Keywords: modem,DF112-AA
Message-ID: <20325@netnews.upenn.edu>
Date: 13 Feb 90 03:49:27 GMT
Sender: news@netnews.upenn.edu
Reply-To: chaim@eniac.seas.upenn.edu (Chaim  Dworkin)
Organization: University of Pennsylvania
Lines: 23

Recently someone gave me an old DEC modem to use with my Rainbow.  It is a
DEC DF112-AA 1200 baud modem.  It appears not to be an autodial modem, rather
it seems to require an attached phone to dial.  There is a row of LEDs and a
row of buttons along the front.

Is there anyone familiar with this modem who can tell me what the buttons
along the front do?  The buttons are labeled as follows:
"LL  ST  RL  DL  HS  Data/Talk"
Obviously the HS switches from 300 to 1200 baud and the Data/Talk does 
just that.  But can anyone tell me what the others do?

Additionally, the LEDs are labeled:
"SD RD CD TR MR OH HS TM"
I know the SD, RD, CD, OH, and HS, but can anyone tell me what the others
are?

I also discovered that ctrl-C toggles from Talk to Data.  Can anyone tell
me if there are any other keyboard commands the modem accepts?

Thanks very much.

                 Chaim