2N VoiceBlue Enterprise - User Manual - Manual (Page 23)

Installation 2-9
2.9. Status Indicators
There is a panel with five LEDs on the gateway upper cover. The
Power indicator signals that the gateway as a whole is in
operation. The other LEDs, marked GSM 1 to GSM 4, indicate the
status of each GSM module.
Power Indicator
Basic diagnostic tests are performed automatically whenever the
gateway is connected to supply voltage. Each test step is signalled
by a specific colour combination of the LEDs. The testing process
is usually shorter than 0.5 sec and so it looks like a quick sequence
of LED flashes at first sight. If, however, a test step fails, the
indicator combination related to the failed test remains lighted.
This provides a convenient troubleshooting tool to the technical
support personnel.
After all hardware tests have been completed successfully, the
operating system kernel is loaded. During the process, all GSM
module indicators are off and the blue continuous Power light
blinks with the period of approximately 1 second.
When the operating system kernel has been loaded, the blue Power
indicator keeps shining continuously.
In exceptional cases, when a fatal failure of software occurs and
the gateway stops working, the Power indicator starts flashing
quickly. All you can do is disconnect the gateway from the power
supply for a few seconds and restart it.
Power Indicator (blue)
No light The system is not working.
Blinking The system kernel is being loaded.
Continuous light The system is working.
Quick flashing "Kernel panic“ – fatal failure