Test the SystemXn120 Getting Started Guide 199- Test the SystemTest the Xn120 System TelephonesAt each phone in turn.1 Press the SPK button. If you hear system dialing tone the phone has initialised correctly,press SPK to clear.If you do not hear dialing tone move to step 2.2 Check the connections. Check the connections from the phone to the Xn120, ensure all 4wires are connected as shown in 4- Connect the Telephones on page11.3 Plug phone into the STconnection at the Xn120 unit.If you have used telephone cable and RJ11 sockets to extend theconnections.Plug the phone directly into the ST connection at the Xn120 unit usingthe line cord supplied with the system phone.If the phone does not initialise correctly then move to step 4.4 Swap the phone. Try another Xn120 system phone plugged directly into the STconnection using the line cord supplied with the phone.Test the Normal TelephonesAt each phone in turn.1 Lift the handset. If you hear system dialing tone the phone is working correctly.If you do not hear dialing tone move to step 2.2 Check the connections. Check the connections from the phone to the Xn120, ensure bothwires are connected as shown in 4- Connect the Telephones on page11.3 Plug phone into the STconnection at the Xn120 unit.If you have used telephone cable and LJU sockets to extend theconnections.Plug the phone directly into the ST connection at the Xn120 unit usingan RJ11 line cord (ensure the line cord connections are correct).If you do not hear dial tone when you lift the handset then move tostep 44 Swap the phone. Try another normal phone plugged directly into the ST connectionusing the RJ11 line cord.Test the Exchange LinesTest each line in turn, only test the lines that you have connected.Use a Xn120 system phone that you have previously confirmed is working correctly to test the exchange lines.1 To test CO1At a Xn120 system phone liftthe handset anddial 805 01If you hear exchange dialing tone the line is working correctly.If you do not hear exchange dialing tone move to step 2.2 Check the connections. Check the connections from the exchange line to the Xn120, ensureboth wires are connected to CO1 as shown in 5- Connect theExchange Lines on page 14.