Gateway – 8 FXS

With Yeastar S-Series, all the telephony interfaces are modular and customizable, S100 allows 2 Expansion Boards to customize FXS, FXO, ISDN BRI, GSM/3G/4G, or E1/T1/PRI port. Yeastar IP PBX S100 – 100 Ext upgradeable to 200

With Yeastar S-Series, all the telephony interfaces are modular and customizable, S20 support 2 onboard module slots to custom FXS, FXO, ISDN BRI, GSM/3G/4G. Advanced communication features to create effective business communication experience for small business, connecting to traditional lines, VoIP lines, cellular networks.