On an international bases, fiber-optic cable to the South Africa, microwave radio relay link to Botswanna

The question is too vague for a specific answer. DMR can mean such things as: distance medley relay, discharge monitoring report, designated marksman rifle, digital mobile radio, digital media receiver, device master record, dual modular radio, differential microwave radiometer, digital microwave radio, direct myocardial revascularization, etc.

FM radio station transmit power in kW, while microwave radio only transmit in 1+ W max. New microwave radio transmit power less than 1W.

The motto of American Radio Relay League is 'The National Association for Amateur Radio'.

American Radio Relay League was created in 1914.