21 December, 2001
ISDN TEST FUNCTION
2-17
Trouble-
shooting
2.4 ISDN
TEST
FUNCTION
2.4.1 LEDS
There are four LEDs on the G4 board. These LEDs show 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