India, Nov. 25 -- Nokia has announced the completion of an upgrade to RailTel's National Long-Distance (NLD) Dense Wavelength Division Multiplexing (DWDM) network across India.

The upgrade includes the deployment of Nokia's Carrier-Grade NAT (CG-NAT) and metro optical transport solutions to support high-speed, resilient intercity connectivity and meet RailTel's expanding data needs, according to the company.

Nokia said the network enhancement uses its 1,830 Photonic Service Switch (PSS) and advanced transponders to increase transport capacity while optimising the cost per bit. The deployment also integrates high-capacity Lambda transmission and express traffic lanes between cities, and reuses existing infrastructure and unused channel s...