For the FXO of UCM, if you hope to make sure it can work normally, you can refer to the below method:
1. we will do the ACIM detection firstly.
2. we will detect the PSTN line.
if we just plug one PSTN line, we can choose semi-auto detect, and you can input your mobile here, after you click detect, you can follow the steps.
if you plug two PSTN lines, you can choose auto detect, here you need to input the real number of FXO 2.
After you chick Detect button, it will detect the related values automatically.
that is all the settings.