supply , installation , commissioning and maintenance of ippbx , item description , core ip telephony serverip pbx system with all the required hardware , software , cabling , accessories etc . , voice gateways with required cabling , accessories and all applicable licenses to handle at least 2 pri lines , perpetual license for lines including conferencing solution for audio & video both , fxs gateway for converting ip to analog ( 120 lines ) , self-survival remote gateway/ippbx for 100 users at each ro with future expandability , ip phone ( type-a ) , patch cord ( 3mtr ) , headset with mic and other accessories , ip phone ( type-b ) with patch cord ( 3mtr ) , and other accessories , power adapter for ip phones , wi-fi based ip phone , amc ( hardware + support service ) of the solution for 1st year , amc ( hardware + support service ) of the solution for 2nd year , amc ( hardware + support service ) of the solution for 3rd year , amc ( hardware + support service ) of the solution for 4th year