Yeastar SO Module, 1 FXS and 1 FXO

Yeastar SO Module, 1 FXS and 1 FXO

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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.
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