User manual

TECHNICAL REFERENCE
8-2
Front-of-the-Case Lights (External Faxmodems)
Symbol Meaning Status
AA...........Auto Answer 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.
CD...........Carrier Detect 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).
RD ...........Received Data Flashes when modem sends result codes or passes received data bits from remote.
SD............Send Data Flashes when computer sends a data bit to modem.
TR............Data Terminal Ready ON if modem receives a DTR signal from computer. Always ON (modem ignores DTR) if the DTR override
is ON (&D0).
CS............Clear to Send ON until modem lowers CTS when Transmit Data hardware flow control is enabled (&H1, &H3).
ARQ/ .......Error Control/
FAX.........Fax Operations 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.
Top-of-the-Case Lights (Voice Faxmodem Pro Externals)
Light What It Means When Lighted
POWER....................The modem is turned on.
SEND .......................The computer is sending a data bit to the modem.
RECEIVE.................The modem is sending result codes or passing received data bits from the remote.
ONLINE...................The modem is online. (NOTE: This light blinks when the mute feature is being used.)