NC-AD300E Manual
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Internal structure of the diagram is as fllows:
Back interface
Front indicator parts
Power module
Link strem power
(2)
(1)
（
（
（
（
4
）
）
）
）
（
（
（
（3
33
3）
）
）
）
（
（
（
（
6
）
）
）
）
（
（
（
（
5
）
）
）
）
（
（
（
（
8
）
）
）
）
（
（
（
（
7
）
）
）
）
0-3
8-11
16-19
24-27
4-7
12-15
20-23
28-31
module
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
The
The back
back
back
back of
of
of
of 300E
300E
300E
300E as
as
as
as shown
shown
shown
shown：
：
：
：
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
Main
Control
Board
