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A module with 1 FXS port and 1 FXO port.
Unique PSTN Fallback Function!
Make/receive calls even during a system power break down.
It can be used in MyPBX SOHO, MyPBX Standard, MyPBX Pro, MyPBX E1, MyPBX E1 Plus, MyPBX Enterprise and TDM800 Card.
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