Eternity is a CE certified Enterprise range PBX. The features are targeted to improve productivity, reduce communication cost. Maximum capacity of this PBX is 468 ports Various interface possible are PSTN Trunks ISDN BRI Trunks ISDN PRI Trunks E1/T1 Interface E&M Trunks GSM Trunks VOIP Analog extensions Digital extensions PC based extensions Main features are CLI (FSK & DTMF) 24-Party conference Auto attendant Security dialer Hotel features Office features Toll control features Productivity enhancement features