Yeastar O2 Module (2FXO) YST-O2 The Yeastar O2 Module (2‑FXO) YST‑O2 seamlessly integrates with P-Series IP PBX platforms (e.g., P520, P560, P570), offering two additional FXO ports to connect analog PSTN lines. This module extends traditional telephony access, enabling hybrid deployments that combine VoIP and legacy phone systems. Supporting caller ID, fax passthrough, loopback detection, and hot-swappable installation, it ensures easy scalability and high resilience for growing communications environments. Key Features: 2 FXO ports for connecting analog PSTN lines Smooth compatibility with Yeastar P-Series IP PBX systems Features include caller ID detection, fax transmission, and line loopback Hot-swappable module for zero-downtime expansion Compact and energy-efficient design, ideal for rack-mount or desktop chassis Supports hybrid telephony setups merging VoIP and analog infrastructure
