supply of supply and installation of radio modem.supply and installation of radio modem.,supply and installation of radio modem in the de-licensed &licensed band o f 5.8ghz with interference handling facility with automatic adaptive feature with data with external support of (rth to 4e1) converter to connect with e&m telephony with in tegrated surge and esd protection, with spectrum analyzing facility, suitable for point to point application with ip67 rated protection minimum of 50mb throughtput similar to radwin, the rflink system should support for e1 with external eth to e1 convertor it s hould have the capability to work with the interfaces of railway control communicati on system, auto phone, uts system etc. [ warranty period: 30 months after the date of delivery ] ]