ZyXEL Prestige 660HW-61 External 91-004-370001 Manual Do Utilizador

Prestige 660H/HW Series User’s Guide

363 

 Splitters and Microfilters

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. 

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

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

microfilter.

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

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

figure.

Figure 238   Connecting a Microfilter

This section relates to people who use their Prestige with ADSL over ISDN (digital telephone 
service) only. The following is an example installation for the Prestige with ISDN.