Matt Hamilton [Maryland] on Nostr: Motorola makes ISM-band digital radios (DTR series) that use a proprietary frequency ...
Motorola makes ISM-band digital radios (DTR series) that use a proprietary frequency hopping mechanism to communicate to other handsets.
While this isn't encryption, it's enough obfuscation to prevent casual scanning and interference when compared to something like FRS.
The ISM band is not subject to licensing. The radios are also limited to 1W, and because it's digital, reception is all-or-nothing.
https://www.motorolasolutions.com/en_us/products/two-way-radios/commercial-business-two-way-radio-systems/on-site-business-radios/dtr-series/dtr600.html#tabproductinfo
While this isn't encryption, it's enough obfuscation to prevent casual scanning and interference when compared to something like FRS.
The ISM band is not subject to licensing. The radios are also limited to 1W, and because it's digital, reception is all-or-nothing.
https://www.motorolasolutions.com/en_us/products/two-way-radios/commercial-business-two-way-radio-systems/on-site-business-radios/dtr-series/dtr600.html#tabproductinfo