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2. Install IP04 and make internal calls
2.1 Install IP04
Simply connect the power cable and Ethernet cable to IP04, make sure that the IP04 connects to
your local network. The port configuration of IP04 are fxo for port1,2 and fxs for port3,4 as show
below:
As show in above picture, we put FXO modules (Red) on Port1 and Port2 so port1 and 2 are
configured as FXO port and we can connect the PSTN line to these two ports. We have also put
the FXS modules (Blue) in port 3 and port 4 to configure these two ports to FXS ports, so we can
connect the normal phone to port3 and port4 as extensions.