Yeastar S20 VoIP PBX Phone System

The Yeastar S20 VoIP PBX phone system is a compact, powerful, and reliable IP telephony solution tailored for small businesses with up to 20 users. Designed to deliver enterprise-grade communication capabilities in a small form factor, the S20 supports up to 10 concurrent calls and a flexible mix of telephony interfaces including VoIP, PSTN, ISDN BRI, and GSM/3G/4G. Powered by Asterisk 13 and advanced processor technology, it offers high reliability, modular expansion, and simplified setup via a web-based interface, making it an ideal PBX for startups, small offices, and remote sites.

Product Features

Complete small office PBX solution
Supports both VoIP and traditional telephony lines, including SIP trunks, PSTN, ISDN BRI, and GSM/3G/4G, for hybrid connectivity.

Designed for simplicity and fast deployment
Plug-and-play installation with auto-detection and streamlined configuration via a modern, web-based user interface accessible from any internet-enabled device.

Modular and scalable design
Equipped with two onboard module slots to add telephony interfaces as needed. Easily adjust to evolving business communication requirements.

Reliable and efficient performance
Powered by a high-performance processor and based on Asterisk 13, the S20 delivers reliable uptime and consistent call quality with one of the industry’s highest MTBF ratings.

Feature-rich call handling capabilities
Supports auto-attendant, call transfer, call forwarding, call conferencing, call hold, music on hold, voicemail, and voicemail-to-email for a professional user experience.

Remote and mobile support
Enables mobile extensions and remote access via SIP, supporting remote workers and distributed teams without compromising system security or performance.

Secure, manageable, and cost-effective
Offers integrated firewall, VLAN, VPN support, and web-based management tools to ensure operational security and reduce IT overhead.

Product Specifications

• User capacity: Up to 20 users
• Concurrent calls: Up to 10
• VoIP protocols: SIP (RFC3261), IAX2
• Trunk interfaces: Supports PSTN, ISDN BRI, GSM/3G/4G, VoIP
• Module slots: 2 onboard expansion module slots
• Voicemail: Built-in voicemail with access via phone or email
• Auto-attendant: Yes, included
• Call features: Call transfer, call forwarding, conferencing, music on hold, call hold, caller ID
• Management: Web-based interface for configuration and control
• Network protocols supported: DHCP, VPN, VLAN, DDNS, PPPoE, static IP
• Dimensions: 200 × 160 × 30 mm
• Weight: 0.5 kg