Yeastar S20 VoIP PBX Compact entry-level small business phone system Easy to use, reliable and feature-rich
Easy to use. Powerful in Production Built for Small Business
Yeastar S20 is a stand-alone PBX system with unrivalled range of features for business with less than 20 users. It’s built to be simple to use and powerful in production.
20 Users
10 Concurrent Calls
Up to 4 FXS/FXO/BRI Ports
Up to 1 GSM/3G/4G Channel
20 VoIP Trunks
Connect, communicate and collaborate the way you like
With S20 to work with Yeastar Linkus UC softphone and Linkus Cloud Service, experience the ultimate convenience of doing business anywhere, on any device
Connect
Eliminate complexity and connect on any device anywhere with Linkus UC Softphone.
Communicate
Voice, conferencing, messaging. Get all advanced features for smarter conversations.

Collaborate
Corporate Directory. Presence. File Sharing. It’s about the team-up.
CRM Integration
Salesforce CRM, Microsoft Dynamics 365,Outlook Contacts, Google Contacts…

Flexible Modular Design
Free Telephony Interfaces Combination
With Yeastar S-Series, all the telephony interfaces are modular and customizable, S20 support 2 onboard module slots to custom FXS, FXO, ISDN BRI, GSM/3G/4G.
Meet S-Series VoIP PBX Modules
Powerful Remote Management
Benefit from a highly secure platform to monitor and manage your PBX system(s) remotely and centrally. Whether you are a phone system end user or a IT reseller, Yeastar Remote Management tool is here to free you from technical headaches and reduce IT & maintenance costs.

Secure Access
Remote Configuration
Real-time Monitor
Instant Alert
Robust Feature Set Crafted for Your Business Needs
Complete Built-in FeaturesExtra Capacity with App Center
Complete Built-in Features
From basic call routing, IVR to advanced call conferencing and recording, Yeastar S-Series VoIP PBX provides you with all-inclusive features without extra licensing fees.
Supported IP Phones
Yeastar S-Series support auto provisioning with numerous SIP/IP phone brands and models.

4G LTE Solution
SIP over 4G LTE. Ideal for temporary locations, mobile offices, and more.

Branch Office Solution
Interconnect multisite with ease and benefit from free and seamless inter-office communications.
Related S-Series Model

S412 VoIP PBX
Flexible and modular VoIP PBX with up to 12 FXS Extensions and up to 4 CO/BRI lines.

S50 VoIP PBX
Compact and full-featured IP-PBX that support 50 users and 25 Concurrent Calls.

S100 VoIP PBX
Cost-effective business phone system with up to 200 users and 60 concurrent calls.

S300 VoIP PBX
Enterprise-class IP telephony services that support scale up to 500 users.