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Internal structure of the diagram is as fllows:
module
Main
Control
Board
Link strem power
AD300E can set up two kinds of modules: FXO and FXS card, each card has four lines. The
maxium of a single device can be set up eghit cards, totally 32 lines.the sequence of FXS\FXO
cards are as shown from (1) to (8), and the number 0 to 31 is the sequence of analog lines.
.
2.2 Interface description
Interface to the back of the device:
The
The back
back of of of of 300E
300E as as as as shown
The
The
back
back
300E
300E
Power: 220V AC；
PCM interface:provide the corresponding number on-demond, and it can support
E1 and T1 currently.
E1 is the ITU-T developed by the European Association of Postal and
Telecommunications (CEPT) digital transmission system named after a group of (ie, PCM30)
standard, from 32 64kbps way through the words of the PCM time-multiplexed to form, its
transmission rate is 2.048Mbps . Usually 30, then road transport of voice and other user
information, the other two telephone channels as the system overhead, transmission
Back interface
0-3
8-11
16-19
（ （ （ （ 3 3 3 3 ） ） ） ）
(1)
（ （ （ （ 4） ） ） ）
(2)
4-7
12-15
20-23
Power module
Front indicator parts
shown： ： ： ：
shown
shown
NC-AD300E Manual
24-27
（ （ （ （ 5） ） ） ）
（ （ （ （ 7） ） ） ）
（ （ （ （ 6） ） ） ）
（ （ （ （ 8） ） ） ）
28-31
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