The ROSETTA-911 Interoperable Radio Communications System from Platforms Wireless International Corporation is a microprocessor-driven, interoperable radio communications "turn-key" system. It is equipped with a Interoperability Gateway Controller, customer-defined mobile and portable radios, and a custom, tri-band, interoperable antenna. The ROSETTA-911 enables disparate VHF, UHF, 700, 800, 900 MHz radios - and cellular telephones -- to efficiently, cost-effectively, and seamlessly interconnect and communicate with each other, regardless of differences in radio equipment make, models, operating channels, frequency bands, or backbone communications facilities. The ROSETTA-911 System integrates seamlessly with established radio communications infrastructures, without the need to replace legacy equipment.