Terminates 2 BRI lines Use with MyPBX SOHO, MyPBX Standard, MyPBX U100, MyPBX U200, and MyPBX U5XX series systems S interface, Signaling EDSS1 (Q.921) Connection via RJ45.This B2 Module, 2 BRI Port is compatible with MyPBX and S-Series PBX. 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 two onboard module slots,and S50 supports 4. S100 and S300 require the combination of Expansion Board and Telephony Modules to add telephony interfaces. S100 allows 2 Expansion Boards and S300 supports 3.
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