Hey mate just try the following link from the DGCA,INDIA website....
http://dgca.nic.in/licencing/conversion.pdf
For RTR:
The holders of Commercial Pilot License (CPL), Airline Transport Pilot License (ATPL) and Flight Engineers License (FEL) from all Commonwealth countries and Philippines will be considered for issue of Indian Radio Telephony Permits directly in lieu of their foreign Flight Radio Telephony Licenses (FRTOLs) provided their FRTOLs are issued from the same Administration from where their Flight Crew Licenses (CPL/ATPL/FEL) have been issued.
If you still need to ask anything, feel free to ask....
