14 June, 2002 ISDN TEST FUNCTION
4-45
Trouble-
shooting
4.7 ISDN TEST FUNCTION
4.7.1 LEDS
There are four LEDs on the G4 board. These LEDs describe the status of the
machine.
LED 1 LED 2 LED 3 LED 4
Initial Settings O=ON, --=OFF
Initial check (if the flash ROM is updated) O O O O
Handshaking with the FCU ready O O -- --
Standby Mode
Ready to communicate -- -- -- --
Communication
Layer 1 activated -- -- -- O
Link setup -- -- O O
B channel 1 connected -- O O O
B channel 2 connected O -- O O