Yeastar IP PBX Modules
Yeastar SO module
The Yeastar SO module includes one FXO and one FXS port to MYPBX
Yeastar S2 module
The S2 is a module with 2 FXS ports to terminate two analog telephone
Yeastar ISDN (BRI) module
The B2 is a module with 2 BRI ports to terminate two BRI lines
Yeastar GSM module
The GSM is a module with 1 GSM port to terminate GSM network

