Επιπρόσθετα Yeastar hybrid PBX S100, VoIP SIP protocols, up to 100 users(expandable to 200),max 30 concurrent calls(expandable to 60). Up to 16 FXS/FXO/BRI ports, up to 6 x GSM ports, up to 2 x E1/PRI. Up to 100 VoIP trunks.Call Recording, IVR, Conference, VoiceMail, Queues, Provisioning for IP phones.