Aiphone AI-900 - Manual (Page 32)

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12.7. AI-900CO Outside Line Interface Card Connection
12.7.1. Outside line and AI-900CO connection
The AI-900CO can be interfaced with up to 2 outside lines. Using DTMF tone dialing, it is compatible with both
loop and ground start systems.
[Connection]
Connect as shown below.
Outside line and AI-900CO connection
1 twisted pair cable
1 twisted pair cable
AI-900CO
CN1
CN2
CN3
CN4
GND * 1
GND
Front view of
the circuit board
Outside line
Line 1
GND * 1
GND
Outside line
Line 2
Lightening
protector *
2
Lightening
protector *
2
U.S.O.C. * 3
RJ11C or W
C/O Line 1
(or PBX
Extension) C/O Line 2
(or PBX
Extension)
* 1 Ground this terminal only when using ground start system.
* 2 Install a protector if not yet installed by the telephone company.
* 3 This terminal must be installed by the telephone company.