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