MF619A データシートの表示（PDF） - YCL Electronics

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MF619A

High Speed Digital Services

YCL Electronics  

Product Specification

MF619A

1. Introduction:

The Single In-Line filter has been specifically designed to implement the functionality of low

pass filter in G.Lite system. G.Lite technology is similar to full rate ADSL in using DMT

technology but operates at a lower data rate of up to 1.5 Mbps downstream and 512 kbps

upstream, depending on line conditions and lengths.

ADSL Lite is proposed as a lower speed version of ADSL that will eliminate the need for

telecom to install and maintain a premise based POTS splitter. Recent field trials of ADSL 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 data rates. The low pass filter provides

protection from ADSL signal which may impact through non-linear or other effects remote

devices ( telephone sets, facsimile machine, answering machine, voice band modem, etc. )

individually or in groups on line 1 only. It also provides a second Jack that is unfiltered for

connecting ADSL and / or HPN. For ADSL signal, it also provides protection from the high

frequency transients and impedance effects that occur during POTS operation ( ringing

transients, on / off hook transients and so on ). This Single In-Line filter provides one filtered

jack for any single line phone devices.

Because the Single In-Line filter connects directly to the subscriber loop media, it must also

provide some protection for externally induced line hits or faults which could damage any

attached equipment or endanger humans interacting with the installed equipment. The circuit

protection will be provided mostly by standard central office line protection means and

additional protection measures built into the Single In-Line filter to protect against line

overstress which could damage the Single In-Line filter itself. The electrical and transmission

specifications are designed electronically to isolate the high speed DSL and HPN data

streams from the voice band Plain Ordinary Telephone Service ( POTS ). This design

effectively blocks the ADSL, HPN and other radio frequencies up to 10 MHz.

Data sheet subject to change without notice

RDPS-MF065(R0)01/13/2003

SHEET 3 OF 10

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