This guide explains the meaning of the indicator lights on the asset telematics hardware devices used for tracking and data communication within the T3 system. Each light corresponds to a different status, such as power, GPS, or cellular connectivity.

CalAmp 3030 / 3035 Devices

Red Light (Power)
- On: Device has power.
- Off: Device is running normally.
Yellow Light (Cellular)
- Blinking: Searching for cellular signal.
- Solid: Cellular signal acquired.
Green Light (GPS)
- Blinking: Searching for GPS signal.
- Solid: GPS signal acquired.

CalAmp 2830 Device

Yellow Light (Cellular)
- Blinking: Searching for cellular signal.
- Solid: Cellular signal acquired.
Green Light (GPS)
- Blinking: Searching for GPS signal.
- Solid: GPS signal acquired.

MC-4+ Device

Red Light (Power & Charging)
- Solid: Device has power.
- Slow Blink: Internal battery is charging.
- Fast Blink: Internal battery charger is faulty.
Yellow Light (GPS)
- Slow Blink: Searching for GPS fix.
- Solid: GPS fix acquired.
Green Light (Cellular)
- Fast Blink: Searching for cellular signal.
- Solid: Cellular signal acquired or signal is sufficient.
- Continued Fast Blink: Signal strength inadequate.
Blue Light (Pairing / Bus Test)
- Slow Blink: Device is unpaired or starting vehicle bus test.
- Fast Blink: Vehicle bus test failed.
- Solid: Device paired or vehicle bus test passed.

Installation Tip: Keep all lights steady in their final states before beginning regular operation.

MC-3 Device

Red Light (Power)
- Solid: Device has power.
Yellow Light (GPS)
- Blinking: Searching for GPS signal.
- Solid: GPS signal acquired.
Green Light (Cellular)
- Blinking: Searching for cellular signal.
- Solid: Cellular signal acquired.
- Fast Blink: Signal strength inadequate.

During Installation

Blue Light:
- Blinking Only: No data is being pulled.
- Solid: Data transmission is active.
After initial sequence, lights may turn off briefly, then resume.
Watch for the blue-yellow-green blinking pattern.
Allow yellow and green lights to turn solid, then power down.
Upon vehicle restart, red, yellow, and green lights should remain solid.

MCX101 / MCX1M1 Device

Navigation LED

LED Behavior	Description
Off	Sleep mode or device malfunction
Blink Every Second	Normal operation; GNSS signal active
Solid	No GNSS signal
Fast Blink	Device firmware update in progress

Status LED

LED Behavior	Description
Off	Boot mode or device malfunction
Blink Every Second	Normal operation
Blink Every 2 Sec	Sleep mode (power-saving)
Fast Blink (Short)	Modem communication active

The device checks in every 12 hours (ignition off) or every 10 minutes (ignition on). It enters sleep mode when idle and resumes normal mode upon movement or ignition.

FJ2500 Device

Depleted Internal Battery

LED	Behavior	Description
Yellow	Slow flash (1/sec)	Cell modem initializing
Yellow	Rapid flash (3/sec)	Establishing cellular connection
Green	Slow flash (2/sec)	GPS modem initializing
Yellow	Solid	Cell connection established
Green	Solid (after 1 min)	GPS connection established

Charged Internal Battery

Same as above, excluding initial slow flash of Yellow.

Power Protect Mode

Same LED behaviors as in "Depleted Battery" state.

Note: If the green LED doesn’t turn solid after 1 minute, turn on the ignition for 1 additional minute. If still unresolved, contact T3 Support.

Queclink GL500 / GL520 Devices

Action	LED Behavior	Description
Press & release (<2 sec)	Blue & Green Solid	Device powered on
Hold & release (>2 sec)	Blue & Green Alternating	Device is powering on
Hold & release (<2 sec) again	Blue & Green Rapid Flash	Device is attempting to send an SOS message