Zte ZXHN H2640 Maintenance Management Manual page 116

ZXHN H2640 Maintenance Management Guide(TIM)
It is suggested to check the following items before seeking help from operators:
1. The VDSL2 telephone cable connectors are proper.
2. The VDSL2 is away from the power cable and large-power electronic devices.
3. No telephone extensions and fax machines are connected between the VDSL2
incoming line and splitter.
4. The splitter has been installed correctly.
5. The ZXHN H2640 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 H2640 will not be On. It is suggested to check the
following steps one by one:
1. First check the quality of incoming cables and incoming cable connectors.
2. Install the ZXHN H2640 correctly based on the user guidance. Minimize the
number of taps.
3. Check whether the telephone cables and VDSL2 are in good connection or
whether the telephone cables are normal.
4. Try to disconnect the splitter and directly connect the ZXHN H2640 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.
5. If the VDSL2 still fails to be synchronized when the ZXHN H2640 is connected to
the incoming user cable end, contact the operators to check whether it is due to
external line failure or ZXHN H2640 failure.
6. If the splitter problem is determined, call the operator for maintenance or
replacement.
7. If the problem is due to the end office equipment failure, call the operator to
confirm it.
8. Too long connection cable between the splitter and ZXHN H2640 may cause
poor anti-interference performance and synchronization difficulty. Therefore, the
connection cable should not be too long.
8-2 SJ-20200714160642-002 | 2020-07-27(R1.0)