O2 is a module with 2 FXO ports to terminate two analog PSTN (POTS) lines. It can be used in MyPBX SOHO, MyPBX Standard, MyPBX U100, MyPBX U200, MyPBX U5XX and S-Series VoIP PBX.Yeastar MyPBX O2 Module₱4,100.00PriceQuantity*Add to Cart