YEASTAR SO MODULE - 1X FXS + 1X FXO

The Yeastar SO Module is a hybrid expansion card designed to extend both analog extension and trunk capabilities for compatible Yeastar IP PBX appliances. Featuring one FXS port for connecting an analog phone, fax machine, or other single‑line terminal, and one FXO port for linking to a PSTN analog trunk, it provides flexible telephony integration in a single module. Its plug‑in design fits into PBXs with expansion slots, enabling straightforward installation and scalability. The module supports loop‑start signaling, caller ID, and line supervision, ensuring reliable operation for inbound and outbound calls. By combining extension and trunk interfaces, the SO Module helps businesses maintain legacy devices while leveraging VoIP features and modern call routing functionalities without needing separate adapters or gateways.

• Brand: Yeastar
• Module Type: SO Expansion Card
• Ports: 1 × FXS (Extension), 1 × FXO (Trunk)
• FXS Port Use: Analog telephone/device connection
• FXO Port Use: PSTN analog line connection
• Signaling Supported: Loop Start
• Caller ID Support: Yes
• Line Supervision: Yes
• Connector Type: RJ11
• Compatibility: Yeastar IP PBX with Expansion Slot
• Operating Temperature: 0°C to 40°C