supply of 1)supply and installation of 02 channel voice data recording and processing unit (vdrpu) as per rdso / spn / tc / 38 - 2002 ver 2 or latest.make ae telelink or equivalent. 2)supply and installation of vhf receiver to record communication with in the radio coverage area of station vhf equipment . 3)supply of server hardware and software for centralized monitoring of voice communication with voice logging for entire stations in nagpur division through vhf based secured communication equipment as per no rdso / spn / tc / 38 - 2002 ver 2 or latest amendments or latest.1)supply and installation of 02 channel voice data recording and processing unit (vdrpu) as per rdso / spn / tc / 38 - 2002 ver 2 or latest.make ae telelink or equivalent. 2)supply and installation of vhf receiver to record communication with in the radio coverage area of station vhf equipment . 3)supply of server hardware and software for centralized monitoring of voice communication with voice logging for entire stations in nagpur division through vhf based secured communication equipment as per no rdso / spn / tc / 38 - 2002 ver 2 or latest amendments or latest.,supply and installation of 02 channel voice data recording and processing unit (vdrpu) as per rdso / spn / tc / 38 - 2002 ver 2 or latest.make ae telelink or equivalent. [ warranty period: 30 m onths after the date of delivery ] ] , supply item description: supply and installation of vhf receiver to record communication wi th in the radio coverage area of station vhf equipment . note: it should be able to work with the proposed vdrpu of ae-telelinks, so that ongoing guard / driver vhf communication should be receivable and gets r ecorded in the storage memory of proposed voice recorder at stations. make: ae telelink or equivalent. warranty period: 30 month(s) from the date of supply [ warranty period: 30 months after the date of deli very ] ] , supply of server hardware and software for centralized monitoring of voice communication wit