CITYLIGHT 10/100 ETHERNET TRANSCEIVER CARD
26
APPENDIX A - TROUBLESHOOTING
PROBLEM
POSSIBLE CAUSES
THE 100 LED DOES NOT
ILLUMINATE.
THE CITYLIGHT 10/100 ETHERNET TRANSCEIVER IS
NOT RECEIVING POWER. CHECK THE PSUS IN THE
ASSOCIATED CITYLIGHT 1U OR 3U CHASSIS OR
CITYLIGHT 2-CARD CHASSIS ARE CORRECTLY
INSTALLED. CHECK THE EXTERNAL POWER SUPPLY
CONNECTION TO THE PSUS IS CORRECT.
MAKE SURE THE SWITCH CONTROLLING THE
OPERATING SPEED IS CORRECTLY SELECTED TO 10
OR 100 Mbps.
IF AUTO-NEGOTIATION IS ENABLED, CHECK THAT THE
CARDS AT BOTH ENDS OF THE LINK ARE OPERATING AT
THE SAME SPEED. WITH AUTO-NEGOTIATION
ENABLED THE COPPER LINKS NEGOTIATE
INDEPENDENTLY; CONSEQUENTLY THE DEVICES
ATTACHED TO THE CITYLIGHT FIBER EXTENDER
MODULES MUST HAVE THE SAME HIGHEST
OPERATING MODE. IF IN DOUBT, CONFIGURE ALL
DEVICES TO HAVE A FIXED OPERATING MODE.
(TYPICALLY 100 Mbps FDX).
THE LINK LED DOES NOT
ILLUMINATE.
THE CITYLIGHT 10/100 ETHERNET TRANSCEIVER
CANNOT DETECT THE CONNECTED DEVICE. CHECK
THE CONNECTED DEVICE IS TURNED ON.
CABLE INCORRECTLY INSTALLED. CHECK THAT THE
CABLE IS CORRECTLY INSERTED IN THE RJ 45
CONNECTOR.
INCORRECT CABLE. CHECK THAT THE CORRECT
CABLE TYPE IS BEING USED. USE THE SUPPLIED
CROSSOVER CABLE FOR CONNECTION TO A DTE TYPE
DEVICE. USE A STRAIGHT-THROUGH CABLE FOR
CONNECTION TO A DCE TYPE DEVICE.
LINK LOSS FORWARDING IS ENABLED (SWITCH 4 IS ON)
AND THE FIBER LINK IS NOT ESTABLISHED. CHECK
THAT THE REMOTE FAULT AND RX ALARM LEDS ARE
NOT LIT. ONCE THE FIBER LINK IS GOOD, THE LOCAL
COPPER LINK WILL INSERT. CONTINUED OVERLEAF.
