Set up an Analog FXO Trunk

This topic describes how to set up an analog FXO trunk on Yeastar P-Series PBX System.

Prerequisites

Install at least one O2 module or SO module on the PBX.

If the module is successfully installed and detected by the PBX, the FXO port information will be displayed on the PBX web interface.
If the module is not detected by the PBX, contact Yeastar support to check the problem.

Find out the FXO port on the PBX.
Log in to PBX web portal, go to Extension and Trunk > Trunk, check the location of the FXO port.
As the following figure shows, an FXO port is located in Span2-Port2.
Use a RJ11 phone line to connect the FXO port of PBX and the PSTN provider's FXS port.
In this example, connect the phone line to port 2 on span 2.
Optional: Configure the FXO trunk settings.
Go to Extension and Trunk > Trunk, select the FXO trunk to edit the trunk settings.

Note: The advanced settings require professional knowledge of analog telephony, carefully configure the advanced settings, or the trunk would not work.

For more information of FXO trunk settings, see Analog FXO Trunk Settings.

Go to Extension and Trunk > Trunk to check the trunk status on the trunk list page.

If the status shows , the trunk is connected successfully.

See FXO Trunk status to know more information of FXO trunk status.

To receive inbound calls through the trunk, you need to select this trunk to one or more inbound routes. For more information, see Set up an Inbound Route.
To make outbound calls through the trunk, you need to select this trunk to one or more outbound routes. For more information, see Set up an Outbound Route.