Black Box CityLIGHT LCL533A Manual page 27

PROBLEM
THE LINK LED DOES NOT
ILLUMINATE.
THE REM F LED IS
ILLUMINATED.
THE ALARM LED IS
ILLUMINATED.
THE DATA ACTIVITY LED DOES
NOT ILLUMINATE.
CITYLIGHT 10/100 ETHERNET TRANSCEIVER CARD
POSSIBLE CAUSES
NOTE IF LINK LOSS FORWARDING IS DISABLED THEN
EACH OF THE COPPER AND FIBER LINKS OPERATE
INDEPENDENTLY.
THE CITYLIGHT 10/100 ETHERNET TRANSCEIVER CAN
SEE THE FAR-END DEVICE. THE FAR-END DEVICE
CANNOT SEE THIS 10/100 ETHERNET TRANSCEIVER. A
FAULT LIES IN OR BETWEEN THE TRANSMITTER OF
THIS CARD AND THE REMOTE CARD RECEIVER.
CHECK THAT THE RECEIVE POWER AT THE REMOTE
DEVICE IS GREATER THAN -28 dBm.
THE FIBER LINK IS NOT WORKING. CHECK THE
RECEIVE CONNECTORS AND MAKE SURE POWER IS
CORRECTLY SUPPLIED TO ALL DEVICES. THE RECEIVE
POWER LIGHT LEVEL SHOULD BE GREATER THAN -28
dBm. IF THE RECEIVE POWER IS LESS THAN -28 dBm AT
THE CITYLIGHT 1U OR 3U CHASSIS, CHECK THE
LAUNCH POWER OF THE CITYLIGHT 10/100 ETHERNET
TRANSCEIVER IN THE REMOTE CHASSIS IS GREATER
THAN -10 dBm FOR THE STANDARD-POWER UNIT AND -3
dBm FOR THE HIGH-POWER UNIT. IF THE RECEIVE
POWER IS LESS THAN -28 dBm, CHECK THE LAUNCH
POWER OF THE CITYLIGHT 10/100 ETHERNET
TRANSCEIVER IN THE CITYLIGHT 1U OR 3U CHASSIS AS
ABOVE.
CHECK THAT THE LINK LOSS IS LESS THAN 18 dB FOR
THE STANDARD-POWER UNIT OR 25 dB FOR THE HIGH-
POWER UNIT.
CHECK THE CONNECTED DEVICES ARE TURNED ON.
CHECK THAT THE ATTACHED NETWORK DEVICES ARE
ACTIVE AND ARE CARRYING DATA. CONTINUED
OVERLEAF...
27