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Telephone Systems / Yeastar

Yeastar S50

The Yeastar S50 is a rack-mountable telephone system designed for small businesses that require greater capacity than the S20. It supports up to 50 users, offers excellent built-in features, VoIP trunks, expansion modules for traditional and mobile lines, unified communications, all with solid performance and a modular design.

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Yeastar S50

Main features

  • Supports up to 50 users and 25 concurrent calls.
  • Modular expansion capacity: up to 8 FXS/FXO/BRI ports and up to 4 GSM/3G/4G channels depending on installed modules.
  • Supports up to 50 VoIP trunks.
  • Built-in unified communication features: SIP phone auto-provisioning, remote management, IVR, recording, conferencing, CRM integration API, etc.
  • Rack-mount (1U) design, robust hardware for business operations.

Technical specifications

Maximum Users

50

Concurrent Calls

25

Maximum FXS/FXO/BRI Ports

Up to 8 combined

Mobile GSM/3G/4G Channels

Up to 4

VoIP Trunks

50

Ethernet Ports

2 × (10/100/1000 Mbps)

Transport Protocols and Codecs

TLS, SRTP; common codecs G.711, G.722, G.729A, etc.

Dimensions / Mounting

1U rack-mount, approx. size 34 × 21 × 4.4 cm

Power Consumption

Low ranges (~2–18.5 W) depending on configuration

About the brand

Yeastar has established itself as a trusted name in IP telephony, providing reliable, modular, and cost-effective PBX systems for businesses of all sizes. The S-Series, including the S50, is recognized for combining scalability with advanced unified communications features, making it an attractive solution for small businesses seeking professional-grade performance without the complexity of expensive licenses. The S50 stands out as a flexible and robust system, allowing companies to expand their communications as their business grows.

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