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參數資料
| 型號： | MF614A |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | High Speed Digital Services |
| 中文描述： | 高速數字服務 |
| 文件頁數： | 3/14頁 |
| 文件大小： | 139K |
| 代理商： | MF614A |
Product Specification
MF614A
Data sheet subject to change without notice
RDPS-MF041(R0)03/21/2002
SHEET 3 OF 14
1. Introduction:
The 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 In-Line filter for phones or
telephone equipments sharing a two-line phone jack. The low pass filters provide 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. ) on line 1
and line 2. 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 In-Line filter provides one filtered jack for any single or two-line
phone devices.
Because the 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
equipments or endanger humans interacting with the installed equipments. The circuit
protection will be provided mostly by standard central office line protection means and
additional protection measures built into the In-Line filter to protect against line overstress
which could damage the In-Line filter itself. The electrical and transmission specifications are
designed to meet T1E1.4/2001-007R3 and as per customer’ s requirement.
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