Lights (External Modems Only) - US Robotics 005687-03 Reference Manual

Lights (External Modems Only)

Front-of-the-Case Lights (on All Non-Voice Externals and Some Voice Externals)
Symbol Meaning
AA ............ Auto Answer
CD ............. Carrier Detect
RD ............. Received Data
SD.............. Send Data
TR.............. Data Terminal Ready
CS.............. Clear to Send
ARQ/ Error Control/
FAX .......... Fax Operations
2
T Q R
ECHNICAL UICK EFERENCE
Status
Answer mode: 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).
Data Mode: Automatic Repeat Request. ON if modem is set to &M4 or &M5
and successfully establishes an error control connection. Flashes when
modem retransmits data to remote modem. Fax Mode: Flashes to indicate fax
mode.