What channels are reserved for specific uses?

Both AM and UHF CB have a number of channels dedicated for specific use. These channels are reserved by the government body responsible for regulating radiocommunications – the ACMA (Australian Communications and Media Authority).

The following is a list of reserved channels for both systems:

Reserved AM Channels

ChannelFrequencyPurposeDescription
827.055HighwayUsed for calling other CB radio users who are operating their radios on the highway.
927.065Emergency CallingUsed only for placing emergency calls to other CB radio users.
1127.085General CallingUsed for calling other CB radio users in Australia. Once you have established contact, you must move to another channel as soon as reasonably possible.
1627.155LSB International CallingUsed for calling other international CB radio users. Once you have established contact, you must move to another channel as soon as reasonably possible.

Reserved FM Channels

ChannelFrequencyPurposeDescription
5476.520Emergency – Repeater OutputUsed only for placing emergency calls to other CB radio users. Ensure the “duplex” or “repeater” button is pressed if an emergency repeater is available in your area.
11476.650General CallingUsed for calling other CB radio users in Australia. Once you have established contact, you must move to another channel as soon as reasonably possible.
22476.950Data OnlyReserved for telecommand and telemetry use – voice communications are not allowed. This channel is predominantly used in rural areas for controlling gates, pumps etc.
23476.975Data OnlyReserved for telecommand and telemetry use – voice communications are not allowed. This channel is predominantly used in rural areas for controlling gates, pumps etc.
35477.275Emergency – Repeater InputUsed only for placing emergency calls to other CB radio users. You should never need to use this channel.
40477.400Highway CallingUsed for calling other CB radio users who are operating their radios on the highway.
61N/AReservedReserved for future use – use of this channel is currently not permitted.
62N/AReservedReserved for future use – use of this channel is currently not permitted.
63N/AReservedReserved for future use – use of this channel is currently not permitted.

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