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.
Yeastar S20 VoIP IPPBX Features and Functions:
10 Concurrent Calls
Up to 4 FXS/FXO/BRI Ports
Up to 1 GSM/3G/4G Channel
20 VoIP Trunks