Flashing in rythm of busy tone
Programming or PC connection mode
Flashing in rhytm of busy tone.
Initialization mode after power supply
connection, restart after programming
etc..
1-5 flashes with period 4 sec
Stand by mode
Number of flashes=signal strenght
GSM connection is running (call)
Short lights off with period 2 sec
GSM modul doesn‘t communicate to CPU