The Yeastar SO Module 1xFXS + 1xFXO Port is a professional telecommunications module for voice communication systems. This module provides an FXS port for analog phones and an FXO port for connecting to traditional telephone lines, enabling seamless integration between analog and digital communication networks. With dimensions of 120 mm in width, 80 mm in depth, and 25 mm in height, and weighing 180 g, the compact module is ideal for space-constrained installations. The use of industrial-grade components ensures reliable performance in various environmental conditions with an operating temperature range of 0 °C to 40 °C. The FXS port supports standard analog phones with RJ11 connectors, while the FXO port establishes connections to the public telephone network for incoming and outgoing calls. The module is compatible with Yeastar IPPBX systems and supports standard telephony protocols including DTMF detection and generation. Both ports feature surge protection to guard against electrical disturbances, and echo cancellation technology ensures consistent voice quality. Installation is straightforward with screw terminal connections and wall mounting options. The module operates on 12 V DC with a typical consumption of 5 W and includes status indicators for monitoring port activity and connection quality. This telecommunications solution is designed for business environments that require reliable analog telephony alongside digital communication systems, offering flexibility for mixed network installations. Its robust construction and adherence to telecommunications standards guarantee long-term reliability and compatibility with existing infrastructure.