VC-400RT
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Managed VDSL2 CPE Router MANUAL Ver. A5
110
System Diagnostics
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 as
explained in the previous section. However, if the unit power is off after running for a
while, check for loose power connections, power losses or surges at the power
outlet. If you still cannot isolate the problem, then the internal power supply may be
defective. In this case, please contact your local dealer.
Installation
Verify that all system components have been properly installed. If one or more
components appear to be malfunctioning (e.g. the power cord or network cabling),
test them in an alternate environment where you are sure that all the other
components are functioning properly.
Transmission Mode
The default method of selecting the transmission mode for RJ-45 ports is 10/100
Mbps ETHERNET, for RJ-11 port are auto-negotiation VDSL. Therefore, if the Link
signal is disrupted (e.g. by unplugging the network cable and plugging it back in
again, or by resetting the power), the port will try to reestablish communications with
the attached device via auto-negotiation. If auto-negotiation fails, then
communications are set to half duplex by default. Based on this type of
commercial-standard connection policy, if you are using a full-duplex device that
does not support auto-negotiation, communications can be easily lost (i.e. reset to
the wrong mode) whenever the attached device is reset or experiences a power
fluctuation. The best way to resolve this problem is to upgrade these devices to a
version that support Ethernet and VDSL.
Physical Configuration
If problems occur after altering the network configuration, restore the original
connections, and try to track the problem down by implementing the new changes,
one step at a time. Ensure that cable distances and other physical aspects of the
installation do not exceed recommendations.
System Integrity
As a last resort verify the switch integrity with a power-on reset. Turn the power to
the switch off and then on several times. If the problem still persists and you have
completed all the preceding diagnoses, then contact your dealer.