The Yeastar PBX Expansion Module with 1 FXS and 1 FXO Port is a versatile accessory designed to enhance the connectivity of your Yeastar PBX system. The module provides one Foreign Exchange Subscriber (FXS) port for connecting analog telephones or fax machines, and one Foreign Exchange Office (FXO) port for linking traditional telephone lines to your VoIP infrastructure. This allows businesses to integrate legacy devices seamlessly into modern communication networks, ensuring flexibility and cost-efficiency. Technical specifications include high compatibility with various Yeastar S-Series models, plug-and-play installation, robust signal processing, and reliable voice transmission quality. Typical applications range from small offices needing hybrid telephony solutions to larger enterprises aiming for gradual migration from analog to IP-based systems. Key advantages are simplified network expansion, reduced operational costs by leveraging existing equipment, and improved business continuity during technology transitions. Yeastar is renowned globally for its innovative telecommunications products that emphasize reliability and user-friendly design while maintaining a strong commitment to sustainability through eco-friendly manufacturing processes and energy-efficient product development. By choosing this module, customers not only optimize their communications but also contribute positively towards environmental protection efforts.