Telephone Microfilters; Figure 2-3 Connecting A Pots Splitter - ZyXEL Communications PRESTIGE 650H-13 User Manual

Noise generated from a telephone in the same frequency range, as the ADSL signal can be disruptive to the
ADSL signal. In addition the impedance of a telephone when off-hook may be so low that it shunts the
strength of the ADSL signal. When a POTS splitter is installed at the entry point, where the line comes into
the home, it will filter the telephone signals before combining the ADSL and telephone signals transmitted
and received. The issues of noise and impedance are eliminated with a single POTS splitter installation.
A telephone splitter is easy to install as shown in the following figure.
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.

2.4.2 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.
Hardware Installation and Initial Setup

Figure 2-3 Connecting a POTS Splitter

Prestige 650H ADSL Router
2-5