annual maintenance contract of 5 x epabx , amc for procurement and installation of epabx for rattakona , rimkhim , ghastoli , kotdwara and mh roorkee , small epabx system no of extensions:128 no . no of junction 24 no . no of expandable ports 512 , operators console -01 , compatible : isdn & networks , float cum boost charger for epabx system , current rating 25 amp , voltage rating 48 volts , main distribution frame ( mdf ) no of pairs : 200 pairs alongwith ipm , small epabx system configuration add-on times nos : isdn interface card ( pri ) , small epabx system configuration add-on items nos : e1 card , small epabx system configuration add-on items nos hot standby card for cpu , small epabx system configuration add-on items nos:hot standby card for psu , small epabx system configuration add-on items nos: extra operator console , small epabx system configuration add-on items nos: digital phone with 2 line display ( 32 characters ) & 8 programmable keys , small epabx system configuration add-on items nos: ip gateway card for 16 channels , small epabx system configuration add-on items nos: price of line extension card per line , small epabx system configuration add-on items nos: price of digital line card per line