Yeastar O2-MODULE 2 FXO ports to add analogue PSTN (POTS) lines to Yeastar VoIP PBX
![2 FXO ports to add analogue PSTN (POTS) lines to Yeastar VoIP PBX](https://cdn.n2erp.co.nz/sna_7997037D-0128-4104-B866-3D126751B9E7/images/products/large/O2-MODULE_636053078076544383.jpg)
2 FXO ports for Yeastar S- and P- Series PBX, to terminate two analog PSTN (POTS) lines.