upkeeping of intrasite telecom upkeeping of intrasite communication systemof btps area ( except coal handling plant ) , maintenance of telephone exchange , routine maintenance , daily routine maintenance of intrasite communication system ( loudophone ) of unit no . 4 , 5 & bop area except coal handling plant and associated telelephone lines of epabx telephone exchange ( model iox 1200 ) the work includes day to day maintenance i . e , ( running / preventive / breakdown ) of following equipments at various locations of 2 x 500 mw btps , anpara . , operation of photocopier machine of modi xerox model no . 5223 stz . 5821 iv & ricoh make . model no 2550 b in general shift .