
TECHNICAL REFERENCE
28
Front Panel Lights (External Modems Only)
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).
Commentaires sur ces manuels