internet lease line connection for backup nerldc , guwahati , description , annual bandwidth charges for dedicated 50 mbps internet leased line connectivity a ) having 24 public static ips of ipv4 and 16 public ips of ipv6 dual stackb ) including port charges , local loop charges , valid license ( for isp ) etc charges to provide & operate internet leased line with fibre ring arrangement , one time charges for providing internet leased line connectivity to backup nerldc , guwahati; e . g , cable laying charges , supply and installation of necessary hardware ( router/switch etc ) for interfacing with nerldc firewall etc .