Accton Technology VM2548 User Manual Page 43
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- Table of contents
- TROUBLESHOOTING
- BOOKMARKS
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A-1
Appendix A: Troubleshooting
Diagnosing Switch Indicators
The VDSL Switch-VS2512A can be easily monitored through panel indicators to
identify problems.The table below describes common problems you may encounter
and possible solutions. If the solutions in the table fail to resolve the problem contact
Accton Technical Support for advice.
Power and Cooling Problems
If the power indicator does not turn on when the power cord is plugged in, you may
have a problem with the power outlet, power cord, or internal power supply.
However, if the unit powers off after running for a while, check for loose power
connections, power losses or surges at the power outlet, and verify that the fans on
the unit are unobstructed and running prior to shutdown. If you still cannot isolate the
problem, then the internal power supply may be defective. In this case, contact
Accton Technical Support for assistance.
Symptom Cause Solution
POWER indicator
does not light up
after power on.
Power outlet, power
cord, or internal power
supply may be
defective.
• Check the power outlet by plugging in another
device that is functioning properly.
• Check the power cord with another device.
If these measures fail to resolve the problem, have
the unit’s power supply replaced by a qualified
Accton distributor.
ETHERNET LINK
indicator does not
light up after making
a connection.
Network cable or
Ethernet device
attached to this port
may be defective.
• Verify that the switch and attached device are
powered on.
• Be sure an Ethernet cable is plugged into both the
switch and attached device.
• Verify that the proper cable type is used and its
length does not exceed specified limits.
• Check the network cable connections for possible
defects. Replace the defective cable if necessary.
VDSL LINK
indicator does not
light up after making
a connection.
VDSL switch, cabling,
VDSL, VDSL LINE, or
VDSL Switch ports may
be defective.
• Verify that the VDSL switch and attached CPE are
powered on.
• Be sure the RJ-21 cables are plugged into the
VDSL switch, splitter, and the VDSL punch-down
block/patch panel.
• Verify that the cable length does not exceed
specified limits.
• Check the cable connections on the VDSL switch,
splitter, punch-down block/patch panel, and the
VDSL CPE for possible defects. Replace the
defective cable if necessary.
- VDSL Switch-VS2512A 1
- VDSL Splitter-VM2524 1
- VDSL Splitter-VM2548 1
- Installation Guide 1
- Accton Technology Corporation 5
- Limited Warranty 6
- Taiwan BSMI Class A 8
- Safety Compliance 9
- Contents 11
- Overview 13
- About the VDSL Switch-VS2512A 14
- VDSL Technology 14
- Management Options 15
- Switch Architecture 15
- Description of Hardware 16
- Expansion Module 17
- 100-240V ~ 50-60 Hz 1A 17
- Ethernet-over-VDSL CPE 18
- Status LEDs 19
- VM2512A-1LX-SC-S 20
- 1000BASE-LX Singlemode Module 20
- VM2512A-1GX-GBIC 20
- 1000BASE-X GBIC Module 20
- VM2512A-1GT 21
- 1000BASE-T Module 21
- 10/100BASE-TX Module 21
- VM2512A-1TX 21
- VM2512A-4FX-MTRJ-S 23
- 100BASE-FX Singlemode Module 23
- Key Features 24
- Chapter 2: Network Planning 27
- Network Planning 28
- Internet Connections 28
- Sample Applications 29
- Making VLAN Connections 29
- Application Notes 30
- Preparing the Site 31
- Equipment Checklist 31
- Mounting 32
- VDSLSwitch 33
- Installing a GBIC Transceiver 36
- Powering On the Switch 37
- Twisted-Pair Devices 39
- ES2002-TS 40
- VDSL CPE 40
- Fiber Optic Devices 41
- Making Network Connections 42
- Appendix A: Troubleshooting 43
- Installation 44
- In-Band Access 44
- Appendix B: Cables 45
- 1000BASE-T Pin Assignments 47
- 1000BASE-T Cable Requirements 47
- RJ-21 Port Pin Assignments 48
- Console Port Pin Assignments 49
- Appendix C: Specifications 51
- Specifications 52
- Switch Features 52
- VDSL Switch 53
- Management Features 53
- Standards 53
- Compliances 53
- VDSL Splitter 54
- Slide-in Modules 55
- 1000BASE-T Extender Module 56
- 100BASE-FX Extender Modules 56
- Ordering Information 62
- Glossary 63
- VM2524, VM2548 72
- E072002-R01 72
- 150000010100A 72
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