CHAPTER 6 – APPLICATION NOTES
21
SocketModem EV-DO MTSMC-EV3 Device Guide
LED Interfac e
The LED signal indicates the SocketModem working status. Refer to the mechanical drawing for LED locations.
LED 1 – Heart beat – IP and –GP Builds Only
LED 1 Signal
Heartbeat LED
OFF
No power to the unit.
Blinking
Power on.
LED 2 – Link Status – All B uilds
LED 2 Signal
Link Status LED
OFF
Device off.
ON
Continuously lit
During initial connection to tower or when connected and
passing data.
Slow blink (-0.2Hz)
Registered to tower and idle.
Faster blink (-3Hz)
Powered not registered/Searching for registration.
N Note:
For non-IP builds, to ensure that the Link Status LED works properly, issue the following AT Command
sequence to the GPIO:
AT#GPIO=1,0,2
AT#SLED=2
LED 3 – Signa l Strength –IP and –GP Builds Only
LED 1 Signal
Heartbeat LED
OFF
No signal
Blinking
The faster the LED blinks, the stronger the signal. The blink rate range is -0.5Hz to -10Hz.
LED 4 – GPS St atus – GP Bui lds
LED 4 Signal
GPS Status LED
OFF
No power to the unit.
ON
Continuously lit
Satellite not acquired.
Blinking
Satellite acquired.