Επιπρόσθετα Yeastar hybrid PBX S50, VoIP SIP protocols, up to 50 users, max 25 concurrent calls. Up to 8 FXS/FXO/BRI ports, up to 4 x GSM ports. Up to 50 VoIP trunks, 4 Slots for Voice Modules. Call Recording, IVR, Conference, VoiceMail, Queues, Provisioning for IP phones.