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Yeastar S2 ModuleS2 Module S2 is a module with 2 FXS ports to terminate two analog telephone
Yeastar O2 ModuleO2 Module O2 is a module with 2 FXO ports to terminate two analog PSTN (POTS) lines
Yeastar B2 ModuleB2 Module B2 is a module with 2 BRI ports to terminate two BRI lines
Yeastar UMTS ModuleUMTS Module UMTS (3G) Port for GSM/3G Voice Calls\nA module with 1 UMTS port to terminate UMTS network.\n\n<b>UMTS Parameters:</b>\n\nUMT
Yeastar GSM ModuleGSM Module GSM Port for Voice Calls\nA module with 1 GSM port to terminate GSM network.\n\n<b>GSM Parameters:</b>\n\nGSM channels: 1 Chan
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