ZTE Corporation ZXHNH168N 用户手册
operators:
i. The VDSL2 telephone cable connectors are proper.
ii. The VDSL2 is away from the power cable and large-power electronic
devices.
devices.
iii. No telephone extensions and fax machines are connected between the
VDSL2 incoming line and splitter.
VDSL2 incoming line and splitter.
iv. The splitter has been installed correctly.
v. The ZXHN H168N has good heat dissipation ratio.
What are reasons for VDSL2 synchronization failure (also referred as
link down or link establishment failure)?
If the VDSL2 suddenly fails to be synchronized (link down) during application,
usually the Link indicator on the ZXHN H168N will not be ON. It is suggested
to check the following steps one by one:
usually the Link indicator on the ZXHN H168N will not be ON. It is suggested
to check the following steps one by one:
i. First check the quality of incoming cables and incoming cable connectors.
ii. Install the ZXHN H168N correctly based on the user guidance. Minimize
the number of taps.
the number of taps.
iii. Check whether the telephone cables and VDSL2 are in good connection
or whether the telephone cables are normal.
or whether the telephone cables are normal.
iv. Try to disconnect the splitter and directly connect the ZXHN H168N to
the incoming user cable end. Ensure the problem is not due to improper
installation or incoming user line quality. If the VDSL2 can be synchronized
again, it means that installation of the incoming user side is improper.
Please reinstall it according to the user guide.
the incoming user cable end. Ensure the problem is not due to improper
installation or incoming user line quality. If the VDSL2 can be synchronized
again, it means that installation of the incoming user side is improper.
Please reinstall it according to the user guide.
v. If the VDSL2 still fails to be synchronized when the ZXHN H168N is
connected to the incoming user cable end, contact the operators to check
whether it is due to external line failure or ZXHN H168N failure.
connected to the incoming user cable end, contact the operators to check
whether it is due to external line failure or ZXHN H168N failure.
vi. If the splitter problem is determined, call the operator for maintenance or
replacement.
replacement.
vii. If the problem is due to the end office equipment failure, call the
operator to confirm it.
operator to confirm it.
viii. Too long connection cable between the splitter and ZXHN H168N may
cause poor anti-interference performance and synchronization difficulty.
Therefore, the connection cable should not be too long.
cause poor anti-interference performance and synchronization difficulty.
Therefore, the connection cable should not be too long.