The Sx212 Modem's Indicator Lights; Chapter 2: Getting Yourself Online - Atari SX 212 Owner's Manual

The SX212 Modem's Indicator Lights
The front panel of the SX212 Modem contains eight LED (light-
emitting diode) indicator lights that let you see at a glance the
status of the modem. These lights come on when you perform
certain functions with your modem.
sx 212 HS AA C.D UH HO SO 1R MR
A ATARI / // // // /
HS: High Speed
AA: Auto-Answer
CD; Carrier Detect
OH: Off Hook
j MR: Modem Ready
TR: Terminal Ready
SD; Send Data
RD: Receive Data
HS (High Speed) indicator is on only when the modem is
operating at 1200 bps. The modem automatically operates at
1200 bps unless you change the speed setting in your soft¬
ware program or when the modem answers a call at a lower
speed.
AA (Auto-Answer) indicator is on when the modem has been
set to automatically answer an incoming call (see
Chapter 2,
Getting Yourself Online).
CD (Carrier Detect) indicator is on when a connection is
established with another modem over the telephone line.
OH (Off Hook) indicator is on when the modem is using the
phone line. Off hook is the equivalent of lifting the phone's
handset up and off the receiver buttons.
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