11
6619-2202
LED Indicators
LED Status Description
TD 
Transmit data OFF No data 
ON / FLASH The modem receiving data on the DTE interface
RD 
Receive data
OFF No data
ON / FLASH The modem transmitting data on the DTE interface
RTS 
Request  
to send
OFF RTS signal is inactive
ON RTS signal is active
DCD 
Data carrier 
detect
OFF DCD signal is inactive
ON DCD signal is active, modem has detected a carrier 
or the signal is set to always ON
DTR 
Data terminal 
ready
OFF DTR signal is inactive
ON DTR signal is active
REL 
Reliable mode OFF Reliable mode is OFF, direct or normal mode
ON Reliable mode is ON
FLASH Reliable mode with error correction and compres-
sion
LINE OFF The modem is on-hook
ON The modem is off-hook with a established connection
FLASH The modem is off-hook and negotiating
PWR 
Power OFF The modem has no power 
ON The modem is up and running
FLASH The modem is in the power-on selftest