Yeastar S50 - S-Series VoIP PBX | Yeastar

Yeastar S50 VoIP PBX

S50 is a compact and full-featured IP-PBX that comes in a 19’’ 1U rack-mountable chassis. The advanced module-based S50 is capable of supporting ISDN BRI, PSTN, and GSM connectivity, providing VoIP communications for up to 50 users.

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award-winning pbx system
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phone users

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


Protected from Internet hackers,
viruses with built-in firewall, TLS,
SRTP, and more.


Powered by Freescale ARM A9
industrial grade quad-core CPU


Free lifetime software/firmware
upgrade assure reliability over the years.

Easy to use

Easy to use
Save time with streamlined
installation. Manage PBX on the intuitive web GUI.

Phone provisioning

Phone provisioning
Automatically provision phones
from Yealink, SnomVTech,
and more.

With Yeastar S-Series, all the telephony interfaces are modular and customizable, S50 support 4 onboard module slots to custom FXS, FXO, ISDN BRI, GSM/3G/4G.

S50 VoIP PBX Modular Design

FXS Module

FXS module

FXO Module

FXO module

PSTN Lifeline

PSTN Lifeline module

BRI Module

BRI Module

GSM Module

GSM module

3G Module

3G module

4G Module

4G module

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 and Google Contacts integrated; more CRM to support
  • Instant messaging and file sharing empowered by Linkus Cloud Service
Learn More

App center. Easy access to a wealth of PBX features.

voip phone system app center
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Robust Feature Set for All of Your Calling Needs

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

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S300 voip pbx


Enterprise-class IP telephony
services that support scale up
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Flexible and modular VoIP PBX
with up to 12 FXS Extensions
and up to 4 CO/BRI lines.

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