S-Series VoIP PBX - Business Phone System | Yeastar

Yeastar S-Series VoIP PBX

Meet Your Next VoIP PBX

Easy to use

Ready to reduce costs

Built to perform

Award-winning VoIP PBX System

Award-winning S-Series VoIP PBX Business Phone System

Easy Configuration and Management

Fast installations with advanced auto-configuration, plug and play capabilities. Control your phone
system with an intuitive Web GUI. Instantly alert through email, SMS, and phone call.
Managed easily from PC, smartphone, or any Internet-enabled device.

live demo
Telephony Modules

Telephony Modules
FXS extensions module, FXO module,
PSTN fallback module, BRI module,
and GSM/3G/4G module.

Expansion Boards
Supports 4 modules in one EX08 Expansion
Board Supports 1 E1/T1/PRI port in one
EX30 Expansion Board.

System Capacity
Expand SIP users and concurrent
calls when your business grows
with DSP Module.

Linkus UC softphone

Linkus Unified Communications App

Linkus is a unified communications app for Windows desktop, Mac desktop,iPhone and Android phones. Designed for Yeastar Cloud PBX and S-Series
VoIP PBX, it transforms your desktop and mobile phone into a fully-featured
office extension.

  • Available using Windows, macOS, iOS, and Android
  • Make and receive enterprise VoIP calls anywhere anytime
  • Outlook Contacts, Google Contacts, Salesforce CRM and Microsoft Dynamics 365 integrated; more CRM to support
  • Instant messaging and file sharing empowered by Linkus Cloud Service
Learn More

Excellent Interoperability

All-inclusive features without extra licensing fees plus a unique App Center that can add and manage features independently.

app center for pbx
s-series feature bg

Robust Feature Set for All of Your Calling Needs

The Yeastar S-Series is designed to help you grow your business by providing plenty of business-enhancing
features and functions. Learn more about the business-enhancing features.


Up to 12 FXS Extensions
Up to 4 CO/BRI lines

S20 voip pbx


Support 20 Users
10 Concurrent Calls

S50 voip pbx


Support 50 Users
25 Concurrent Calls

S100 voip pbx

Up to 200 Users
Up to 60 Concurrent

S300 voip pbx

Up to 500 Users
Up to 120 Concurrent

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