SIP Yeastar S100 VoIP PBX support Expansion Boards & modules Users: 100 (expand up to 200), Max. Concurrent Calls: 30 (expand up to 60), Max. Analog Ports:16, Max. GSM/3G/4G ports:6, VoIP Trunks:100 max. E1/T1/J1 PRI ports: 2 External Storage SD Card +USB Aveilable Expansion Boards: EX-08 has 4 onboard module slots and 8 interfaces on the panel EX-30 has 1 onboard E1/T1/PRI port, D30 add 100 VoIP Users & 30 Concurrent Calls Default Delivery without any Modules or Expansion Boards !!, Aveilable same modules as S20/S50 models Ethernet Interfaces: 2 × 10/100/1000 Mbps , Power: 100-240VAC-50/60Hz /20W , Size: 440x252x44mm / 2.6Kg

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