Yeastar EX08 Expansion Card/Board with 8 RJ11 Ports for S100 and S300

Yeastar S100 and S300 system expansion board supports O2, S2, GSM, and LTE modules, and up to 4 extra modules with 8 ports. two expansion cards for the S100 and three for the S300

With its distinctive modular design, the Yeastar S-Series VoIP PBX offers flexible telephone interface combinations while facilitating future expansion. In addition to the extensive built-in SIP capabilities, the S-Series allows you to choose the kinds of physical trunks and extensions your phone system needs. With the S-Series, you can also expand your business by adding more users and concurrent calls.

All of the telephony interfaces offered by the Yeastar S-Series, including FXS, FXO, ISDN BRI, GSM/3G, and E1/T1/PRI, are modular and programmable. S50 and S412 support four onboard module slots, while S20 has two. Expansion Board and Telephony Module must be used together in S100 and S300 in order to add telephone interfaces. S100 supports 2 expansion boards, whereas S300 can accommodate 3.