MF601HK データシートの表示（PDF） - YCL Electronics

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MF601HK

Asymmetric Digital Subscriber Line

YCL Electronics  

Product Specification

MF601HK

Introduction

ZHP-r Defined

ADSL Lite is proposed as a lower speed version

of ADSL that will eliminate the need for telecom

to install and maintain a premises based POTS

splitter.

Recent field trials of DSL Lite equipment jointly

carried out by a group of manufacturers and a

North America network operator has proved the

technology , achieving maximum data rate for

distance up to 15000 feet. It was found

necessary to include one or more low pass

filters in series with the POTS terminals in order

to reliably achieve maximum dada rates.

For POTS voice band service , the low pass

filter provide protection from ADSL signal which

may impact through non-liner or other effects

remote devices (handset , fax, voice band

modem etc)and central office operation.

For ADSL signal , it also provide protection from

the high frequency transient and impedance

effect that occur during POTS operation

( ringing transients , on-hook , off-hook transient

and so on).

To facilitate testing of the inline filterindepend-

ently of the actual modem or specific vendor ,

ZHP-r is defined to allow proper termination of

the XDSL port during voice band testing.

The ZHP-r is valid only for voice band

frequency.

The combination of capacitors in the

ZHP-r is only representative. The input

shall be 27nF however derived. ZNP-r

equivalent circuit is shown in Figure 1.

Figure 1

DC characteristic

All requirement of this specification can be met

in the presence of all POTS loop currents from

0mA to 100mA.

This in line filter can pass POTS tip-to-ring dc

voltages of 0V to 105V and ringing signals of

40V to 150Vrms at any frequency from15.3Hz

to 68Hz with a dc component in the range from

0V to 105V.

The dc resistance from tip-to-ring at the line port

interface with the phone interface shorted, shall

be less than or equal to 100 ohms.

The DC resistance from tip-to-ground and

from ring-to-ground at the POTS interface

with the U-R interface open shall be greater

than or equal to 5 Megohms.

The ground point shall be local building or green

wire ground. As an objective , the dc resistance

should exceed 10MΩ.

Data sheet subject to change without notice

RDPS-MF034(R0)01/03/2002

SHEET 3 OF 5

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