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S Series S20 | S Series VOIP PBX | yeastar

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



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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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.

SpecificationsS20S50S100S300
Users2050100 (up to 200)300 (up to 500)
Max Concurrent Calls102530 (up to 60)60 (up to 120)
Max FXS/FXO Ports481624
Max BRI Ports481624
Max GSM/3G Channel1466
Max E1/T1/PRI Ports23
LAN1 × 10/100Mbps1 × 10/100/1000Mbps
WAN1 × 10/100Mbps1 × 10/100/1000Mbps
PowerDC 12V 1AAC 100-240V 50/60HZ 0.6A maxAC 100-240V 50/60HZ 1.8A max
Dimensions (L x W x H) (mm)160 x 160 x 30340 x 210 x 44440 x 252 x 44440 x 252 x 44
Weight0.3 kg1.48 kg2.5 kg2.6 kg
Power Consumption1.8-10.6 W2.1-18.5 W5.5-41.2 W6.2-59.1 W
EnvironmentOperation 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
MountingDesktop & Wall-mountRack-mount
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