Easy to Install
Simple to Manage
Built to Perform
Fast Installations
Save time with streamlined installation and maintenance tasks using our advanced auto-configuration, auto-detect and plug and play capabilities. S-Series basics S-Series compatible phones
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. Online Demo
S-Series web interface 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.
Learn more
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.
Automated Attendant (IVR)
Call Back
Call Detail Records (CDR)
Call Monitor
Call Recording
Call Routing
Call Transfer
Distinctive Ringtone
Event Center
Email to SMS/SMS to Email
Fax to Email
Find Me/Follow Me
Mobility Extension
Music on Hold
User Portal
User Privileges
Video Calls
Voicemail to Email
and more
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.
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
LAN 1 x 10/100Mbps 1 x 10/100/1000Mbps
WAN 1 x 10/100Mbps 1 x 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