The tender was floated two years ago but IR had to scrap it at least five times for various reasons until the specifications were finalised.

BEL, ITI, HFCL, and TCIL are public sector undertakings, while Sterlite, Vindhya, Karvy, Matrix and M2M are private companies. However, only five bidders will carry out the work after opening of the financial bids in December.

IR wants to strengthen video surveillance across the network. The IP cameras will not only record movements at stations and trains, but will also have facial recognition software, motion detection, quick review and intrusion detection. Images will be scrutinised round-the-clock by security personnel from the Railway Protection Force and Railway Police.