ZyXEL Communications P841C - Manual (Page 34)

P841C Central-Side VDSL Modem
6-2 Troubleshooting
6.3 Intermittent VDSL LED
A VDSL LED turns on and off intermittently.
Table 6-3 Troubleshooting a Non-Constant VDSL LED
STEPS CORRECTIVE ACTION
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 VDSL LED stays on, check for a problem with the building’s phone wire.
2 Use the VDSL commands to reset and reconnect the VDSL channel (see sections 4.1.6 and 4.1.7).
6.4 Data Rate
The SYNC-rate is not the same as the configured rate.
Table 6-4 Troubleshooting the SYNC-rate
STEPS CORRECTIVE ACTION
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 rates match, the regular phone wire quality may be limiting the speed.
2 Use the VDSL commands to reset and reconnect the VDSL channel (see sections 4.1.6 and 4.1.7).
3 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.
6.5 Password
I forgot the password to my P841C.
Table 6-5 Troubleshooting the Password
STEPS CORRECTIVE ACTION
1 Contact your distributor for a “generic password”. Tell them your product serial number (located on the
sticker on the bottom of the P841C) and firmware version you are using (see section 3.4.4).
6.6 Connecting to an Ethernet Switch
The P841C cannot connect to an Ethernet switch.
Table 6-6 Troubleshooting Connecting to an Ethernet Switch
STEPS CORRECTIVE ACTION
1 Check your cable connections. Use a crossover Ethernet cable to connect to a hub or an Ethernet switch.
(Use a straight-through Ethernet cable to connect to a computer.)
2 The factory default settings for the Ethernet port of the P841C are: