Yeastar SO Module
Yeastar SO Module with 1FXO+1FXS. The Yeastar SO Module is compatible with MyPBX series and S-Series PBX and has a unique PSTN Fallback Function enabling you to make/receive calls even when system powers down.
> Unique PSTN Fallback Function! Make/receive calls even when system power breaks.
> It can be used in S Series (S20, S50, S100 & S300)
> One FXO and one FXS Service.