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7.2 Appendix B: Troubleshooting
z Symptom: Power indictor does not light up (Green).
¾ Causes: Defective external power supply.
¾ Solution: Check the power plug by attaching with a functioning
one. Check the power cord with other devices. If both tests fail,
have the power supply replaced by qualified distributor.
z Symptom: Link indicator does not light up (Green).
¾ Causes: Network interface, network cable or switch port may
be faulty.
¾ Solution:
Power off and reconnect the VDSL switch.
Verify attached network devices are powered on.
Verify the cables are connected properly on both ends.
Verify the proper cable is used and the distant does not
exceed the specified limit.
Phone wire must be connected between SP3508A and
VDSL modem prior to powering on of devices.
Replace the defective cable or modem if necessary.
z Symptom: VDSL always link on 5M/5M speed mode at short phone
cable.
¾ Cause: VDSL auto speed lock up.
¾ Solution: Please re-power VDSL Modem (SP3501AS).
¾ SP3508A will redo auto speed function while SP3501AS
being re-powered on.
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