comprehensive annual maintenance contract of coral digital epabx system coral digital epabx system installed at foreign service institute , ministry of external affairs , old jnu campus , new delhi-110067 , cable , 03 nos . armoured cable ( exchange to hostel ) , 01 armoured cable ( exchange to c-block , c-block to a-block and c-block to b-block ) , 01 armoured cable ( exchange to d-block and to a-block ) , telephone set ( beetal ) , plan ( panasonic ) 1:8 ( in institute block ) , kts ( digital coral ) ( in institute block ) , 32 digital lines ( dlc cards ) , 48 p&t lines ( mtnl land lines ) ( atc cards ) , 248 analog lines ( intercom ) ( lcs cards ) , expandable box upto 504 ports & 4 racks , cpu 512 with tone card , bridge card , 48v power supply card , 04 port stand alone voice mail-pc base , 600 port protection panel-make topaz , 10 amp fcbc-float-cum-boost-charger