Zte ZXHN H167A User Manual page 11

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 H167A 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 H167A 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 H167A 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
operators:
i. The VDSL2 telephone cable connectors are proper.
ii. The VDSL2 is away from the power cable and large-power electronic
devices.
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 H167A 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,