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D-20
A
PPENDIX
D: T
ROUBLESHOOTING
Cable Connection Problems
Table D-7
Cable Connection Problems
Problem
Possible Causes
Possible Solutions
Link Status LED
indicates that
there is a problem with a link.
Far End Status LED
indicates
that there is a problem with the
ATM Module’s transmit
connection.
■
One or both of the ATM ports forming
the connection are turned off (disabled).
■
The cable at either end of the link has
become loose or accidentally
disconnected.
■
The two connectors at one end of the
fiber cable may be plugged into the port
the wrong way around.
■
The fiber optic is caught under a heavy
object or become bent out of shape.
■
The cable connector may be dirty.
■
The cable may be broken.
■
The connector itself is physically
damaged.
■
Ensure that both ports are enabled.
■
Ensure that the cable is securely connected to the
port at both ends of the link.
■
Check each end of the cable to ensure that each of
the fiber connectors is correctly connected. You may
need to reverse the TX and RX cable connectors at
one end of the connection.
■
Remove any obstructions and straighten out any
kinks in the cable.
■
If you suspect that the fiber optic connector is dirty,
refer to “Cleaning Dirty Fiber Optic Connectors” in
this chapter.
■
Replace the cable, and check the LED again.
■
Contact your repair center for advice. For more
details, refer to Appendix E.
Summary of Contents for OPTIONS ATM OC-3c
Page 1: ...8271 Nways Ethernet LAN Switch ATM OC 3c Module User s Guide...
Page 6: ......
Page 10: ...4 ABOUT THIS GUIDE...
Page 23: ...Asynchronous Transfer Mode ATM Layer 2 11 Figure 2 7 Switching Cells using VPI and VCI values...
Page 28: ...2 16 CHAPTER 2 NETWORK LAYER CONCEPTS...
Page 31: ...Extending VLANs into the ATM Network 3 3 Figure 3 3 Extending VLANs into the ATM Network...
Page 32: ...3 4 CHAPTER 3 VIRTUAL LAN CONCEPTS...
Page 39: ...Campus Configuration 5 3 Figure 5 2 Campus and Cost Sensitive Network...
Page 50: ...7 2 CHAPTER 7 ACCESSING MANAGEMENT FEATURES Figure 7 1 Screen Map...
Page 80: ...9 14 CHAPTER 9 MONITORING THE ATM MODULE...
Page 87: ...Safety Notices A 7 IEC 950 SELV SELV...
Page 88: ...A 8 APPENDIX A SAFETY INFORMATION...
Page 90: ...B 2 APPENDIX B SCREEN ACCESS RIGHTS...
Page 94: ...C 4 APPENDIX C ATM MODULE TECHNICAL SPECIFICATIONS...
Page 98: ...D 4 APPENDIX D TROUBLESHOOTING Figure D 1 Troubleshooting Flow Diagram...
Page 120: ...E 2 APPENDIX E TECHNICAL SUPPORT AND SERVICE...
Page 136: ...2 BIBLIOGRAPHY...
Page 140: ...4 INDEX...