ZyXEL p-660h-61 Guía Del Usuario

Prestige 660H Series User’s Guide 

Splitters and Microfilters 

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This appendix tells you how to install a POTS splitter or a telephone microfilter. 

When you use the Full Rate (G.dmt) ADSL standard, you can use a POTS (Plain Old Telephone 
Service) splitter to separate the telephone and ADSL signals. This allows simultaneous Internet access 
and telephone service on the same line. A splitter also eliminates the destructive interference 
conditions caused by telephone sets.  

Install the POTS splitter at the point where the telephone line enters your residence, as shown in the 
following figure. 

 

Connect the side labeled “Phone” to your telephone. 

Connect the side labeled “Modem” to your Prestige. 

Connect the side labeled “Line” to the telephone wall jack. 

Telephone voice transmissions take place in the lower frequency range, 0 - 4KHz, while ADSL 
transmissions take place in the higher bandwidth range, above 4KHz. A microfilter acts as a low-pass 
filter, for your telephone, to ensure that ADSL transmissions do not interfere with your telephone 
voice transmissions. The use of a telephone microfilter is optional.  

Connect a phone cable from the wall jack to the single jack end of the Y- Connector. 

Connect a cable from the double jack end of the Y-Connector to the “wall side” of the 
microfilter. 

Connect another cable from the double jack end of the Y-Connector to the Prestige. 

Connect the “phone side” of the microfilter to your telephone as shown in the following 
figure.