ZXDSL 831/831B/831II/831BII User’s Manual                  
12 
  Note: 
In the circumstance where the first connection example is not applicable and 
you choose to use the second example, you must install a MicroFilter on the 
telephone cable (as illustrated in Figure 3.3-2, do not use a splitter to replace 
the MicroFilter). 
Installing a telephone directly before the splitter will lead to a failure of 
connection between the ZXDSL 831/831B/831II/831BII and the device at 
central office side, or a failure of access into the Internet, or a slow connection 
speed. If you really need to add a telephone set before the splitter, you have to 
add a MicroFilter before the telephone set. Do not connect several telephones 
before the splitter. Moreover, do not connect several telephones with 
MicroFilters.  
The filter is not a standard-configuration device and you should separately 
purchase it from the operator.   
Connection procedures 
1  Power off the equipment before all the other devices are connected.   
2  Connect the network cables: Insert the RJ-45 Ethernet cable connector 
into the Ethernet interface of the ZXDSL 831/831B/831II/831BII, and 
connect its other terminal to the Ethernet adapter of the customer computers 
or ports of other network devices. 
3  Connect the splitter 
The splitter has three interfaces, which are described as follows:   
z  LINE: Connect the user telephone cable (RJ11 interface). 
z MODEM (or ADSL): Connect the DSL interface of the ZXDSL 
831/831B/831II/831BII.  
z  PHONE (or TEL): Connect the phone sets.   
The installation process is as follows: Connect the DSL interface of the 
ZXDSL 831/831B/831II/831BII to the MODEM interface of the splitter