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This chapter covers potential problems and possible remedies. After each problem description, some
6.1 VDSL LED
The VDSL LED is not on.
STEPS
1
Disconnect the phone wire coming from the VDSL port of the P841C and connect the subscriber's VDSL
modem or router directly to the VDSL port of the P841C using a different telephone wire.
If the LED turns on, check for a problem with the building's phone wire.
2
Set the VDSL modem to "auto-negotiate". If this is not possible, set it to 100 Mbps, half duplex mode.
3
Use the VDSL commands to reset and reconnect the VDSL channel (see sections 4.1.6 and 4.1.7).
4
Log into the P841C, enter the VDSL debug command (see section 4.1.10), take screen shots of this
information and send it to your nearest customer support representative.
5
If the LED remains off, contact the distributor.
6.2 Data Transmission
The VDSL LED is on, but data cannot be transmitted.
STEPS
1
Disconnect the phone wire coming from the VDSL port of the P841C and connect the VDSL modem or
router directly to the VDSL port of the P841C using a different telephone wire.
If data can be transmitted, check for a problem with the building's phone wire.
2
Check to see that you are using the correct VDSL mode (see section 4.1.1).
3
Use the VDSL commands to reset and reconnect the VDSL channel (see sections 4.1.6 and 4.1.7).
4
Connect the VDSL modem or router to another P841C (VDSL port).
If the VDSL modem or router works with a different P841C, then there may be a problem with the original
P841C. Contact the distributor.
5
If using a different P841C does not work, try a different subscriber VDSL modem or router with the
original P841C.
6
Log into the P841C, enter the VDSL status command (see section 4.1.8) and the VDSL debug command
(see section 4.1.10), take screen shots of this information and send it to your nearest customer support
representative.
Troubleshooting
steps are provided to help you diagnose and solve the problem.
Table 6-1 Troubleshooting the VDSL LED
CORRECTIVE ACTION
Table 6-2 Troubleshooting Data Transmission
CORRECTIVE ACTION
P841C Central-Side VDSL Modem
Chapter 6
Troubleshooting
6-1
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Table of Contents
Troubleshooting
