XtendLan XL-VC102SB User Manual - page 15
XtendLan VC102SB – User’s Guide
http://www.xtendlan.com
- 15 -
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,
contact your 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 10Mbps 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 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 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.