Isdn Test Function - Gestetner B003 Service Manual

2.4 ISDN TEST FUNCTION

2.4.1 LEDS
There are four LEDs on the G4 board. These LEDs describe the status of the
machine.
Initial Settings
Initial check (if the flash ROM is updated)
Handshaking with the FCU ready
Standby Mode
Ready to communicate
Communication
Layer 1 activated
Link setup
B channel 1 connected
B channel 2 connected
SM
LED 1 LED 2
2-17
ISDN TEST FUNCTION
LED 3 LED 4
O=ON, --=OFF
O
O
--
--
--
--
O
B003/B004/B006/B007
O O O
O -- --
-- -- --
-- -- O
-- O O
O O O
-- O O