


Yeastar B2 Module
Yeastar B2 Module Contact us OverviewFeaturesDownloads and Documentation With Yeastar S-Series, all the telephony interfaces are modular and customizable, whether it’s FXS, FXO, ISDN BRI, GSM/3G, or E1/T1/PRI. S20 has 2 onboard module slots, S50 and S412 supports 4....