Zte ZXHN H2640 Maintenance Management Manual page 115

Chapter 8
Troubleshooting

All indicators are of when the ZXHN H2640 equipment is powered on.
First make sure that you have inserted the power adapter of the ZXHN H2640
into a working power socket and that the ZXHN H2640 has been powered on (the
switch button is pressed down). If the indicators are still off after confirmation of the
above items, may be the hardware is damaged. You may contact local operators for
maintenance. Never dismantle the equipment by yourself.
 Will VDSL2 affect the telephone conversation quality? Will making phone calls
cause a slow online rate?
VDSL2 separates voices from data through the frequency division multiplexing
technology. Therefore, voices and data run in different paths without mutual
interference. Neither the access rate nor conversation quality will fall even if you are
in a call and online simultaneously.
 How to properly install telephone extensions or other devices on the VDSL2
line?
It is recommended to connect the VDSL2 splitter to the telephone cable first and then
connect the phone sets to the splitter interfaces. Installing a telephone directly before
the splitter will lead to connection failure between the ZXHN H2640 and the device
at central office side, or an Internet access failure, or a slow connection speed.
Connecting other electronic devices between the user end and splitter may affect the
VDSL2 communications (since VDSL2 has a higher requirement for the line quality)
and furthermore affect the normal operation of VDSL2. If the phone sets are required
to be connected before the splitter, you should serially connect the MicroFilter before
the phone sets (Generally, to minimize interference, only one MicroFilter can be
connected before the splitter).
 Sometimes, the VDSL2 users cannot access to the Internet normally
First check whether the ZXHN H2640 is in the normal state (Check the indicators
according to this user manual). If yes, the computer or application network may be
faulty. This is unrelated with VDSL2. If the ZXHN H2640 is abnormal, check the
status of indicators one by one to remove the fault.
SJ-20200714160642-002 | 2020-07-27(R1.0) 8-1