AirLink ES450 Hardware User Guide
Rev. 7 July 2019
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Configuring with AT Commands
You can also configure the ES450 gateway using AT commands over the RS-232 serial
port or the USB port (configured as a virtual serial port). All the commands are listed in
the ALEOS Software Configuration User Guide.
•
Most AT commands are prefaced with AT. Exceptions are noted in the ALEOS
Configuration User Guide.
•
The acceptable format and parameters are listed with each command in the ALEOS
Configuration User Guide.
•
If you enter a recognized AT command, the ES450 gateway responds with “OK.” If the
command is wrong, the ES450 gateway responds with “ERROR” or “Unsupported.”
LED Behavior
Table 2-2: LED Behavior
LED
Color / Pattern
Description
Power
Off
No power or input voltage
≥
36 VDC or
≤
9 VDC
Solid Green
Device is connected to nominal power and is operating normally.
Solid Amber
Device is entering low power mode or system low level boot.
Solid Red
Device is not operational (failure or in low power mode).
Signal
Solid Green
Good signal (RSSI
≥
-85 dBm)
Solid Amber
Marginal signal (-100 dBm
<
RSSI
<
-85 dBm)
Solid Red
Poor signal (-110 dBm
≤
RSSI
≤
-100 dBm)
Flashing Red
No signal (RSSI
<
-110 dBm)
Network
Solid Green
Connected to an LTE network
Flashing Amber / Green
Network Ready—No LTE service available
Flashing Green
Network Ready—Roaming (LTE service available)
Flashing Amber / Green / Off
Network Ready—Roaming (No LTE service available)
Flashing Amber
No Service
Solid Amber
Connected to a 3G or 2G network
Flashing Red
Authentication/Negotiation failed (EV-DO only)
Solid Red
Link Down
No cellular network is present, no network coverage at current
location, or the device is in radio passthru mode
Flashing Red/Amber
The gateway is unable to locate the required radio module firmware.
You must upgrade the radio module firmware for the gateway. For more
information, refer to the ALEOS Software Configuration User Guide.
