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The Yeastar EX08 is an expansion board for the S100 and S300 PBX products. It supports up to 4 optional modules/8 ports, including O2, S2, B2, GSM, UMTS, and CDMA modules.
• 8 RJ11 ports
• Can add 2 expansion cards to S100, and 3 to S300 PBX
• Supports up to 4 optional modules
• S100 PBX
• S300 PBX
for free return