Product specifications

VDSL. CTC Union

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