The Yeastar S-Series VoIP PBX was designed to help small and medium enterprises make a giant leap in efficiency while saving costs. The S-Series unleashes the power of unified communications and provides flexibility with a field-upgradable modular design. By connecting business-enhancing features with free software updates, the S-Series will ensure reliability as your business grows. 

Yeastar S-Series VoIP PBX Key Benefits

Easy-to-use Solution

With an intuitive browser-based interface and a robust set of management tools such as plug and play capabilities, auto phone provisioning and remote management, productivity will increase as you focus on your business.  

One Platform All Communications

Experience the ultimate convenience of doing business anywhere, on any device with the S-Series VoIP PBX which, is compatible with the Yeastar Linkus UC softphone and Linkus Cloud Service.


The Yeastar S-Series features advanced failover, security, monitoring and reporting capabilities combined with an internal firewall and support for TLS and SRTP encryption.

Key Features 

  • Linkus UC Clients for Desktop and Mobile 
  • Works with SIP/IAX2, PSTN lines, ISDN BRI, E1/T1/PRI, and GSM/3G/4G 
  • Built-in call recording capability 
  • Powerful Apps (add-ons) include Linkus Server, Auto Provision, LDAP, Conference Panel, VPN Server, Billing App, Hotel App
  • Control and manage customer premises PBX easily and quickly with Remote Management 
  • Convenient integration with call centres, PMS, and CRM 
  • Connect multiple sites and remote users  
  • No hidden charges and extra licensing fees 
  • Low power consumption (1.8-59.1 watts)

S-Series VoIP PBX Models We Recommend 

Yeastar S50 VoIP PBX

Full-featured rack-mountable IP-PBX built for small businesses, with superior UC capacity and next-level efficiency. Supporting up to 50 users, the rack-mountable Yeastar S50 comes all-in-one with industrial-grade components to fuel small business success. The S50 boasts advanced features with superior Unified Communications and rich built-in APIs to empower small business communications.

Yeastar S50 Features:

  • 50 Users
  • 25 Concurrent Calls
  • Up to 8 FXS/FXO/BRI Ports
  • Up to 4 GSM/3G/4G Channel
  • 50 VoIP Trunks

Yeastar S100 VoIP PBX

A simple and powerful IP-PBX system, which is designed for SMBs with less than 200 users. The Yeastar S100 is a scalable module-based VoIP PBX built to empower and streamline the way you do business. The S100 is equipped with a quad-core processor, robust Unified Communications and excellent interoperability.

Yeastar S100 Features:

  • 100 Users (expandable to 200)
  • 30 Concurrent Calls (expandable to 60)
  • Up to 16 FXS/FXO/BRI Ports
  • Up to 6 GSM/CDMA/3G/4G Channels
  • Up to 2 E1/T1/PRI Ports

Yeastar S300 VoIP PBX

Supporting up to 500 users, Yeastar S300 delivers enterprise-class IP telephony services with a strong presence in scalability, mobility, 3rd-party integration, unified communications, and management.

Yeastar S300 Features:

  • 300 Users (expandable to 500)
  • 60 Concurrent Calls (expandable to 120)
  • Up to 24 FXS/FXO/BRI Ports
  • Up to 6 GSM/CDMA/3G/4G Channels
  • Up to 3 E1/T1/PRI Ports

How we can help you make the Switch! 

Considering a move to VoIP from a traditional Public Switched Telephone Network can seem daunting, but, luckily we are here to assist you with tailored solutions specific to your organisation’s needs.

Simply request a callback, and one of our friendly advisors will be in contact with you for a free assessment and answer any questions you might have.