ZyXEL Communications Prestige 861H-G1, User Manual

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Prestige 861H User’s Guide
Splitters and Microfilters C-1
Appendix C
Splitters and Microfilters
This appendix tells you how to install a POTS splitter or a telephone microfilter.
Connecting a POTS Splitter
When you use the VDSL standard, you can use a POTS (Plain Old Telephone Service) splitter to
separate the telephone and VDSL 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.
Diagram C-1 Connecting a POTS Splitter
1. Connect the side labeled “Phone” to your telephone.
2. Connect the side labeled “Modem” to your Prestige.
3. Connect the side labeled “Line” to the telephone wall jack.
Telephone Microfilters
Telephone voice transmissions take place in the lower frequency range, 0 - 4KHz, while VDSL
transmissions take place in the higher bandwidth range, above 4KHz. A microfilter acts as a low-
pass filter, for your telephone, to ensure that VDSL 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.