Yeastar O2 Module (2FXO) – YST-O2

Key Features Ports: 2 RJ11 FXO Ports. Supported Model: S412, S20, S50, S100, S300, P550, P560, P570. Ring Frequency Detection: 15~50 Hz. Ring Voltage Detection: 30+ VRMS (depend on the FXO mode) Termination: PSTN Lines. Echo Cancellation: Support.