Meet Your Next VoIP PBX


Easy to Install

Easy to Install

Simple to Manage

Simple to Manage

Built to Perform

Built to Perform

S-Series VoIP PBX
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Fast Installations

Save time with streamlined installation and maintenance tasks using our advanced auto-configuration, auto-detect and plug and play capabilities.

s-series-fast installations
s-series connect IP phone

Easy Configuration

Control and update your phone system with intuitive and graphical UI and point-and-click configuration using S-Series online Configuration Panel. Everything can be managed easily from any Internet-enabled device.

Live Demo
live demo

Scalable Modular Design

  • Telephony Modules

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

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Linkus Mobile Client

Coordinated with S-Series VoIP PBX, Linkus Mobile Client makes your Android or iOS mobile phone an office extension and links you and your colleagues and customers anywhere anytime.

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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.

Reliable System

Powered by the latest processor technology, S-Series is a trust worthy telephone system with one of the highest MTBF (Mean Time Between Failures) in the industry. Based on Asterisk 13, S-Series is born to be powerful and constantly meeting your needs.

reliable system

S-Series Models

Small business, home office, and mid-sized business will find a model that fits their business needs.

Specifications S20 S50 S100 S300
Users 20 50 100 (up to 200) 300 (up to 500)
Max Concurrent Calls 10 25 30 (up to 60) 60 (up to 120)
Max FXS/FXO Ports 4 8 16 24
Max BRI Ports 4 8 16 24
Max GSM/3G Channel 1 4 6 6
Max E1/T1/PRI Ports 2 3
Module Slots 2 4
Expansion Boards (EX08/EX30) 2 3
D30 DSP Module 1 2
LAN 1 × 10/100Mbps 1 × 10/100/1000Mbps
WAN 1 × 10/100Mbps 1 × 10/100/1000Mbps
Power DC 12V 1A AC 100-240V 50/60HZ 0.6A max AC 100-240V 50/60HZ 1.8A max
Dimensions (L x W x H) (mm) 160 x 160 x 30 340 x 210 x 44 440 x 252 x 44 440 x 252 x 44
Weight 0.3 kg 1.48 kg 2.5 kg 2.6 kg
Power Consumption 1.8-10.6 W 2.1-18.5 W 5.5-41.2 W 6.2-59.1 W
Environment Operation Range: 0°C to 40°C, 32°F to 104°F; Storage Range: -20°C to 65°C, -4°F to 149°F; Humidity: 10-90% non-condensing
Mounting Desktop & Wall-mount Rack-mount


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