Yeastar O2 Module (2fxo) Yst-O2

The yeastar o2 module adds two fxo ports to compatible yeastar s-series voip pbx systems, enabling seamless connection of analog pstn lines. this expansion module allows inbound and outbound calls via traditional phone lines, offering flexibility and backup alongside voip connectivity. specifications: model: yst-o2 type: 2 fxo ports (analog trunk lines) compatibility: yeastar s-series pbx (s20, s50, s100, s300) function: connects pbx to pstn analog telephone lines use case: pstn fallback, hybrid telephony, cost-effective routing