ZyXEL Communications Prestige 643 - Manual (Page 34)

Prestige 643 ADSL Router
2-4 Hardware Installation & Setup
A telephone splitter is easy to install as shown in the following figure.
Figure 2-3 Connecting a POTS Splitter
Step 1. Connect the side labeled “Phone” to your telephone.
Step 2. Connect the side labeled “Modem” to your Prestige.
Step 3. Connect the side labeled “Line” to the telephone wall jack.
2.5 Telephone 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 purchase of a telephone microfilter is optional.
Step 1. Connect a phone cable from the wall jack to the single jack end of the Y- Connector.
Step 2. Connect a cable from the double jack end of the Y-Connector to the “wall side” of the
microfilter.
Step 3. Connect another cable from the double jack end of the Y-Connector to the Prestige.
Step 4. Connect the “phone side” of the microfilter to your telephone as shown in the following figure.
Wall
Jack
Prestige
Modem
Line
POTS Splitter
Phone