Yeastar MyPBX S300

300 (up to 500) Extensions (SIP\IAX), 60 (up to 120) Concurrent calls , max 24 FXS/FXO ports , Max 6 GSM/3G Channel , Max 3 E1/T1/PRI Ports , 1 10/100/1000Mbps LAN port, 1 10/100/1000Mbps WAN port, Rackmount