CITYLIGHT FIBRE CHANNEL CARD
22
APPENDIX A - TROUBLESHOOTING
PROBLEM
POSSIBLE CAUSE
THE LINK LED IS NOT LIT
THE CITYLIGHT FIBRE CHANNEL CARD IS NOT
RECEIVING POWER. CHECK THAT THE CARD IS
CORRECTLY INSERTED INTO THE CHASSIS AND
THAT POWER IS CORRECTLY SUPPLIED TO THAT
CHASSIS.
THE LINK DOES NOT PASS
DATA OR IS NOT
RESPONDING TO
MANAGEMENT
THE RECEIVER LIGHT LEVEL IS NOT CORRECT.
CHECK THAT THE RECEIVE LIGHT LEVEL IS
BETWEEN -6DBM AND -20DBM.
THE DATA LED DOES NOT
ILLUMINATE
THE CITYLIGHT FIBRE CHANNEL CARD IS NOT
RECEIVING DATA FROM THE LOCAL USER DEVICE.
CHECK THAT ALL UNITS ARE POWERED UP AND
CONNECTED CORRECTLY. CHECK THE LAUNCH
POWER OF THE USER EQUIPMENT AND CHECK IT IS
WITHIN THE RANGE SPECIFIED FOR THE INTERFACE
TYPE. SEE APPENDIX B, TECHNICAL DATA.
THE REM F LED IS RED
THERE IS A FAULT IN THE FIBER PATH FROM THE
SINGLE-MODE TX PORT ON THE CITYLIGHT FIBRE
CHANNEL CARD TO THE REMOTE CARD.
CHECK THE TRANSMIT LINK FROM THIS FIBRE
CHANNEL CARD TO THE REMOTE CARD RECEIVER.
CHECK THAT THE REMOTE RECEIVE LIGHT LEVEL IS
GREATER THAN -20DBM.
THE LINK LED IS RED
THE CITYLIGHT FIBRE CHANNEL CARD HAS A
RECEIVE ALARM CONDITION ON THE USER PORT.
CHECK THAT THE USER EQUIPMENT IS POWERED
UP AND THAT THE RECEIVE LIGHT LEVEL IS BOTH
THE CORRECT LEVEL AND WAVELENGTH FOR THE
CARD TYPE BEING USED (850NM MULTIMODE OR
1300NM SINGLE-MODE). SEE APPENDIX B,
TECHNICAL DATA FOR DETAILS OF THE OPTICAL
SPECIFICATIONS.
THE LINK LED IS GREEN
THE LOCAL USER PORT IS OPERATING CORRECTLY.
