- 05 -
C.O line
connection control
C.O
Line
thunder
bolt
device
Stable
voltage
C.O line
polor checking
C.O line
ringing checking
(Arrange CO Line number from bottom to top)
CO Line Port
CO Line Port
8#
7#
6#
5#
4#
3#
2#
1#
2.2.3 CO LINE CARD
The CO line card is take charge to Ringing Detect,
Control-polor Detecting, Arresters, Audio Amplifying,
CO line ON/OFF,etc.
2.2.4 EXTENSION CARD
Extension card is the main part of unit.
It have hook-switch ON / OFF detecting,
Ringing Control,ringing-cut circuits and talking matrix.
The user need only add or reduce the CO line or Ext.line card
to increase or decrease the capacity, suggest install expansion
cards by order from LEFT to RIGHT to keep continuity of the
default numbers.
You must to OFF the power supply when add or reduce the
expansion cards to avoid the unit can't work normally.
(Arrange Ext.Line number from bottom to top)
Ext.Line Port
Ext.Line port
8#
7#
6#
5#
4#
3#
2#
1#
Содержание CRS-1XB
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