Technical Reference; Front-Of-The-Case Lights (External Serial Faxmodems) - US Robotics USR5610B User Manual

6
Front-of-the-Case
Lights (External
Serial Faxmodems)
T
ECHNICAL
Symbol Meaning
AA Auto Answer
mode
CD Carrier Detect
RD Received Data
SD Send Data
TR Data Terminal
Ready
CS Clear to Send
R
EFERENCE
Status
ON when register S0 is set to
1 or higher (Auto Answer),
and when answering a call;
OFF when modem originates
a call. Light flashes when
there is an incoming call.
ON if modem receives a valid
data signal (carrier) from a
remote modem, indicating
that data transmission is
possible. Always ON if CD
override is ON (&C0)
Flashes when modem sends
result codes or passes
received data bits from
remote
Flashes when computer
sends a data bit to modem
ON if modem receives a DTR
signal from computer.
Always ON (modem ignores
DTR) if the DTR override is
ON (&D0)
ON until modem lowers CTS
when Transmit Data
hardware flow control is
enabled (&H1, &H3)