Description
This is a summary of the article, "Yeastar So Module W Fxs And Fxo Ports". The SO is a module with a FXS and FXO Port, which means that calls can be made even when the system is turned off.
Make sure this fits by entering your model number. The SO is a module with a FXS and FXO Port Make/receive calls even when system powers down. The SO is a module with a FXS and FXO Port. Make/receive calls even when system powers down.
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