P/N: AD-8039J

E.4.3.2

Out Band

The band between the voice band and ADSL band is defined as the out band in §E.4. In Japan, the out band is used with

pulse metering (16 kHz) OVS signals (7.8 kHz), and OFFTALK-services (0 – 7.0 kHz). These specifications an

measurement methods of the Out Band require further study.

E.4.3.3

ADSL Band

This paragraph describes the AC characteristics in the ADSL band.

E.4.3.3.1

ADSL Band Attenuation

The attenuation in the stop band of the low-pass filter (i.e., the difference in attenuation measured with and with and

without the low-pass filter), shown in Figure E-27, shall be greater than 65 dB for frequencies ranging from 25 kHz to

300 kHz and 55 dB for frequencies ranging from 300 kHz to 1104 kHz with an input level of 10 dBm.

LPF

POTS

xDSL port

Source:100ohm

25-1104KHz

balanced

Line port

Vm

600 ohm

Hi Z

ZHPr

Remote POTS splitter

Figure E-27 – Measurement of the R

POTS splitter attenuation in the ADSL band.

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