Telephone Systems / Yeastar
Yeastar S20
The Yeastar S20 is a compact IP PBX designed for small businesses with up to 20 users. It delivers robust features such as VoIP, traditional line support, cellular integration, IVR, call recording, all within a user-friendly interface and remote management. It is ideal for organizations seeking a complete solution without the hassle of additional license fees.
Main features
- Supports up to 20 users and 10 concurrent calls.
- Connects up to 4 FXS/FXO/BRI ports depending on installed modules.
- One GSM/3G/4G channel for mobile integration/modems.
- Up to 20 VoIP trunks.
- Intuitive graphical user interface, SIP phone auto-provisioning, remote management, and secure control panel.
- Unified communications (UC) features supported: messaging, voicemail, IVR, etc., with no hidden fees.
Technical specifications
Maximum Users
20
Maximum Concurrent Calls
10
Maximum VoIP Trunks
20
Maximum FXS/FXO/BRI Ports
4
GSM/3G/4G Mobile Channels
1
Transport Protocols
SIP, TLS, SRTP, etc.
Ethernet Interfaces
Typically 2 × Ethernet ports (10/100)
Dimensions and Mounting
Compact design for desktop / basic mounting
Power Consumption
Low consumption, depending on installed modules
About the brand
Yeastar is a global manufacturer of IP telephony and unified communications (UC) solutions, with a strong focus on IP PBXs for both small/medium-sized businesses and larger implementations. Its systems are known for being modular, easy to manage, integrating UC functions, offering strong security, and robust remote support—making them a reliable choice for businesses seeking performance and simplicity.

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