New Delhi, July 29 -- India's satellite-based police communication network, Polnet, is set for a major upgrade, and some of the country's biggest tech and defence players have spotted an opportunity.

Tata Group's Nelco, Adani's subsidiary Alpha Design Technologies, Hughes, Cisco, and Bharat Electronics Ltd are among the firms eyeing contracts to supply new satellite terminals worth about Rs.100-200 crore for the network, two government officials and industry executives in the know said on the condition of anonymity.

Police Network or Polnet, a vital, secure communication system like the Internet for India's police and security forces, was launched in 2002. It connects police stations and security forces, including the ones guarding bord...