Yeastar S20 - PBX Business Phone System (Barebones) (No modules)

Yeastar SSeries VoIP PBX provides flexible telephony interfaces combination while allowing for future scalability with unique modular design Besides the builtin rich SIP capabilities SSeries lets you decide what types of extensions and physical trunks you need in your telephone system When your business grows adding more users and concurrent calls is also possible with SSeries With Yeastar SSeries all the telephony interfaces are modular and customizable whether its FXS FXO ISDN BRI GSM3G or E1T1PRI S20 has 2 onboard module slots