NEC XN120 User Manual page 23

Test the Exchange Lines
Test each line in turn, only test the lines that you have connected.
Use an XN120 system phone that you have previously confirmed is working correctly to test the exchange
lines.
1 To test CO1 connection
At an XN120 system phone lift
the handset and
dial 805 xx
(xx is the exchange line
number – refer to the Ports
Assigned section)
2 Check the connections.
To test CO2 connection
3
At an XN120 system phone lift
the handset and
dial 805 xx
(xx is the exchange line
number – refer to the Ports
Assigned section)
4 To test CO3 connection
At an XN120 system phone lift
the handset and
dial 805 xx
(xx is the exchange line
number – refer to the Ports
Assigned section)
XN120 Expansion Unit Guide
If you hear exchange dialing tone the line is working correctly.
If you do not hear exchange dialing tone move to step 2.
Check the connections from the exchange line to the XN120, ensure
both wires are connected to CO1 as shown on page 17.
If you hear exchange dialing tone the line is working correctly.
If you do not hear exchange dialing tone check the connections from
the exchange line to the XN120, ensure both wires are connected to
CO2 as shown on page 17.
If you hear exchange dialing tone the line is working correctly.
If you do not hear exchange dialing tone check the connections from
the exchange line to the XN120, ensure both wires are connected to
CO3 as shown on page 17.
Test the System
23