Yeastar O2 Module
Yeastar O2 Module (2FXO) is a module with 2 FXO ports to terminate two analog PSTN(POTS) lines. The O2 Module 2FXO is compatible with MyPBX series and S-Series PBX.
Primary Function
• Provides 2 RJ11 FXO ports to terminate two analog PSTN lines and connect them to a Yeastar VoIP PBX system for inbound/outbound PSTN calling.
Compatibility
• Works with Yeastar S-Series and P-Series PBX platforms (e.g., S20, S50, S100, S300, S412, P550, P560, P570).
Key Specifications
• Ports: 2 × RJ11 FXO (PSTN)
• Ring Frequency Detection: 15 – 50 Hz
• Ring Voltage Detection: 30+ VRMS (dependent on FXO mode)
• Termination Type: Analog PSTN (POTS) lines
• Echo Cancellation: Supported
• Signaling Modes:
– Foreign Exchange Office (FXO): 2-way connection to PBX/central office
– Foreign Exchange Station (FXE): Access to carrier services
– Private Line Automatic Ringdown (PLAR): Unswitched point-to-point connection
Typical Use Cases
• PSTN Line Integration: Connects traditional analog service provider lines into an IP-PBX for inbound/outbound calls.
• PSTN Failover: Provides a backup calling path in case VoIP service is unavailable.
• Hybrid Telephony Deployment: Ideal for businesses maintaining both VoIP and legacy analog infrastructure.