4000 & 5000 Series User’s Guide
2.5 Indicators Lights (LED)
The modem has 8 green LEDs on its front panel providing information on the state of the
modem:
LED
Indication
Status
Corresponding State
PWR
Power
OFF
Modem is powered off
ON
Modem is powered on
TX
Transmit
Flashing
Attached terminal is transmitting data to
modem via serial port
RX
Receive
Flashing
Attached terminal is receiving data from
modem via serial port
DTR
Data Terminal
Ready
OFF
No terminal is detected over modem serial
port
ON
Terminal host is detected over modem serial
port
REG
Registration
OFF
Radio is off (contact customer support)
Flashing
Radio is registered on cellular network
ON
Radio not registered on cellular network
LNK
RF link
OFF
Not in a data call
ON
In a data call (connected to network)
ACT
RF activity
Flashing
Transmitting/receiving data over cellular
network
SER
(4000
series)
SER
This LED is unused
GPS
(5000
series)
GPS
ON
No position fix available
Flashing
Position fix acquired
Table 8
Revision 1.5
Copyright © 2007 BlueTree Wireless Data Inc. Page 15 of 67