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| 型號(hào)： | MF609A |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | The in-Line Micro filter |
| 中文描述： | 在線微過(guò)濾器 |
| 文件頁(yè)數(shù)： | 3/12頁(yè) |
| 文件大?。?/td> | 120K |
| 代理商： | MF609A |
Product Specification
MF609A
Data sheet subject to change without notice
RDPS-MF038(R0)01/23/2002
SHEET 3 OF 12
1. Introduction:
The in-Line Micro 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 1.5Mbps downstream and 512Kbps
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 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 data rates. For POTS voice band service , the
low pass filter provide protection from ADSL signal which may impact through non-line 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).
Because the POTS splitter 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 pots splitter to protect against line overstress which
could damage the splitter itself.
2. Reference:
Ref. 1 : ETS 300 001
Attachment to Public Switched Telephone Network
Ref. 2 : ANSI T1E1.4 In-Line Network and Customer Installation Interface
Filter standard
Ref. 3 : ITU-T K21
Resistibility of subscribers terminal to overvoltage and
overcurrents
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