Telephone Microfilters; System Startup And Leds; Figure 4 Connecting A Microfilter - ZyXEL Communications P-663H-51 User Manual

Chapter 1 Introducing the ZyXEL Device
2 Connect the side labeled "Modem" or "DSL" to your ZyXEL Device.
3 Connect the side labeled "Line" to the telephone wall jack.

1.4.2 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 use of a telephone microfilter is optional.
1 Locate and disconnect each telephone.
2 Connect a cable from the wall jack to the "wall side" of the microfilter.
3 Connect the "phone side" of the microfilter to your telephone as shown in the following
figure.
4 After you are done, make sure that your telephone works. If your telephone does not
work, disconnect the microfilter and contact either your local telephone company or the
provider of the microfilter.

Figure 4 Connecting a Microfilter

1.5 System Startup and LEDs

After you are done making the hardware connections, press the power button to the ON
position. Look at the LEDs (lights) on the front panel. The following figure shows the ZyXEL
Device's LEDs.
28
P-663H-51 User's Guide