User's Manual

11
5. LED Indicator
The states of the LED indicator are described in the following table.
LED Indicator State
Device State
Red light on
- No SIM card is installed, or it is installed improperly (with voice
prompt “No SIM card is installed”).
- Fail to unlock the PIN code of the SIM card.
Green light on
- During a call (i.e. individual/group/all call).
Yellow light on
- The device is in individual-call standby state.
- The device is not configured on the server (with voice prompt “Not
configured”).
- The device is expired.
- The device is in standby state or call setup state under duplex talk.
Red light flashes fast
- Network registration fails because of an inactivated SIM card or
overdue charge.
- Device registration fails because of poor wireless network
connection.
Green light flashes slow
- Network registration is successful, and the device enters standby
state.
Yellow light flashes fast
- The device is powered on.