System Diagnostics - Dynamix DV-24 User Manual

24VDSL+2Giga Ethernet Managed 4 Band VDSL IP DSLAM USER'S MANUAL Ver. A.4

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 selections of the transmission mode for the RJ-45 ports are auto-negotiation using the default method.
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 re-establish communications with the attached device (auto-negotiation). If
auto-negotiation fails, then communications are set to half duplex by default. Based on this type of industry-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 version that will support auto-negotiation.
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