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2. Unit Description
2.1. Front Panel Indicators
LED Status Meaning
AA
(Auto Answer)
On Answer mode only: Modem is answering a call and
DIP Switch 5 is UP (Enable Auto Answer), or
register S0 is set to 1 (Auto Answer, 1 Ring).
Off No activity, or modem is originating a call.
Flash Incoming call.
CD
(Carrier Detect)
On A valid data carrier signal has been received from a
remote modem, and Dip Switch 6 is UP (Normal
Carrier Detect). Modem is ready to transmit data.
The CD Indicator will remain ON constantly if Dip
Switch 6 is DOWN (Carrier Detect Override).
RD
(Receive Data)
Flash Modem is sending result codes or passing received
data bits.
SD
(Send Data)
Flash Computer is sending data bits.
TR
(Data Terminal
Ready)
On Modem is receiving DTR signal from computer. The
TR indicator will only function when Dip Switch 1 is
UP (Normal DTR). Remains ON constantly if Dip
Switch 1 is DOWN (DTR Override).
CS
(Clear to Send)
On Hardware flow control is enabled (&H1, &H3),
modem is waiting for low CTS signal.
Page 2
RMM User’s Guide