Part 15 broadcasters, which include low-power unlicensed devices like Wi-Fi routers and cordless phones, do not receive individual call signs from the FCC. Call signs are typically issued to licensed radio stations, including full-power AM and FM radio stations, as well as television stations.
Part 15 devices operate under specific rules and regulations outlined in Part 15 of the FCC's rules. These rules govern the use of unlicensed radio frequency devices and set limitations on power levels, emissions, and other technical parameters to prevent harmful interference to licensed services.
Unlicensed devices under Part 15 do not have call signs because they operate within specified technical parameters and do not have the same responsibilities and regulatory requirements as licensed broadcasters.
The guidance provided in §73.3550(l) of the FCC's rules is relevant to Part 15 device operators. These operators are free to use whatever identification they desire, as long as it is done appropriately and does not cause confusion with licensed stations.
In summary, LPFM stations have FCC-issued call signs, while operators of Part 15 devices do not receive individual call signs from the FCC.