After having been lobbied for many years by rural users, the Australian Communications Authority (ACA) has announced changes to Citizens band (CB) radio licences to allow the transmission of data on UHF CB channels 22 & 23.

The changes announced by the ACA regarding these two channels will allow for the use of selective calling techniques such as CTCSS (Continuous Tone Coded Squelch System) and telemetry and telecommand systems.

Tone squelch allows a system of selective calling, where a number of transceivers share one channel but will only "wake up" and listen if they receive the same preset tones as they have had previously programmed.