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Sometimes, the VDSL2 users cannot access to the Internet normally
First check whether the ZXHN H185 is in the normal state (Check the indi-
cators according to this user manual). If yes, the computer or application
network may be faulty. This is unrelated with VDSL2. If the ZXHN H185 is
abnormal, check the status of indicators one by one to remove the fault.
It is suggested to check the following items before seeking help from operator:
i. The VDSL2 telephone cable connectors are proper.
ii. The VDSL2 is away from the power cable and large-power electronic de-
vices.
iii. No telephone extensions and fax machines are connected between the
VDSL2 incoming line and splitter.
iv. The splitter has been installed correctly.
v. The ZXHN H185 has good heat dissipation ratio.
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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 H185 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 H185 correctly based on the user guidance. Minimize the
number of taps.
iii. Check whether the telephone cables and VDSL2 are in good connection
or whether the telephone cables are normal.
iv. Try to disconnect the splitter and directly connect the ZXHN H185 to the in-
coming user cable end. Ensure the problem is not due to improper installa-
tion or incoming user line quality. If the VDSL2 can be synchronized again,
it means that installation of the incoming user side is improper. Please re-
install it according to the user guide.
v. If the VDSL2 still fails to be synchronized when the ZXHN H185 is con-
nected to the incoming user cable end, contact the operators to check
whether it is due to external line failure or ZXHN H185 failure.
vi. If the splitter problem is determined, call the operator for maintenance or
replacement.
vii. If the problem is due to the end office equipment failure, call the operator
to confirm it.
viii. Too long connection cable between the splitter and ZXHN H185 may
cause poor anti-interference performance and synchronization difficulty.
Therefore, the connection cable should not be too long.