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FXO Setting
Line Side Impedance Setting:
To specify the PSTN or PBX impedance, choose your country from the list.
For most of the cases, once you choose your country, all the other
corresponding settings will be set automatically.
Or please enter the right impedance if you cannot find your country in the list.
For example: if the PSTN line impedance is 600 ohm, please select 600 in this
field. If you choose your country from the list, go directly to Loop Current
Shutdown Detection setting.
If your country is not in the above setting list or your country is in the list
but you still encounter a disconnection failure, you must do “Tone
Detection Frequency Setting” and “Tone On-Off Duration Setting”.
Tone Detection Frequency Setting: