System Diagnostics - netsys NVF-200LS/Rver.S User Manual

7. Symptom: VDSL flickers at 25Mbps when multicast streams.
Cause: Power level is too high and noise immunity is weak.
Solution: Fixed the speed to 15Mbps, since 15Mbps is ideal for multicast streaming while 25Mbps is for
transferring large data file at high speed.

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, and verify that the
fan on back of the unit is unobstructed and running prior to shutdown. 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
5/15/25Mbps 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
NVF-200LS/Rver.S 4 Band VDSL CO/CPE Modem USER'S MANUAL Ver. B.1
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