The Yeastar S-Series S50 represents the sweet spot for medium-sized businesses, medical clinics, and branch offices that have outgrown basic phone systems but don't need massive enterprise hardware. It serves as a true hybrid IP-PBX, centralizing digital VoIP and legacy telecom infrastructure into a single, highly secure, and incredibly easy-to-manage 1U appliance. With plug-and-play auto-provisioning and an intuitive web-based GUI, the S50 minimizes IT maintenance time while maximizing office productivity.
• Key Features
Built for Growing SMEs: Natively supports up to 50 SIP extensions and easily handles up to 25 concurrent calls, ensuring no customer ever receives a busy signal during peak operational hours.
Highly Modular Architecture: Features 4 internal expansion slots. Customize the exact hardware ports you need by installing Yeastar modules to support up to 8 FXS (Analog Phones), 8 FXO (PSTN Lines), 8 ISDN BRI ports, or up to 4 GSM/3G/4G cellular SIM cards.
100% License-Free Ecosystem: Break free from cloud subscription traps. The S50 is a one-time purchase that includes lifetime firmware updates and premium features—such as Call Recording, Voicemail-to-Email, and Call Queues—at absolutely zero additional cost.
Linkus Unified Communications: Transform any iOS or Android smartphone, as well as Mac and Windows laptops, into a fully functional office extension. Make, receive, and transfer corporate calls remotely while displaying your official business caller ID.
Automated Security: Equipped with military-grade TLS and SRTP encryption, an internal firewall, and an automated IP auto-defense mechanism to instantly detect and block SIP hacking attempts.
• Performance / Technology
Powered by an industrial-grade Freescale Quad-Core processor and a dedicated Texas Instruments (TI) DSP voice chipset, the S50 guarantees lightning-fast call routing and pristine HD voice quality (G.722 codec support). It also supports up to 50 VoIP trunks, allowing you to easily link multiple international branch offices or utilize ultra-cheap SIP carrier rates.
• Design & Ergonomics
Unlike smaller entry-level models, the S50 features a professional 1U rack-mountable design (340 x 210 x 44 mm). It bolts cleanly into standard 19-inch IT server racks or network wall cabinets, keeping your telecom infrastructure organized, secure, and well-ventilated alongside your network switches and patch panels.
• Compatibility / Use Cases
The S50 integrates flawlessly with major global SIP trunk providers and offers instant auto-provisioning for industry-leading IP phones from Yealink, Fanvil, Cisco, Polycom, and Snom. It is the definitive telecommunications hub for corporate branch offices, medium-sized retail operations, law firms, and boutique hotels.
• Why This Product Stands Out
The Yeastar S50 stands out by offering extreme modularity within a compact 1U form factor. While competitors force businesses to buy separate, expensive VoIP gateways to connect old Etisalat/Du analog lines, the S50 allows you to plug those legacy lines directly into the PBX via cheap FXO modules, creating a flawless hybrid network in minutes.
