Oricom DTX4200 Operating Instructions Manual page 28

UHF CB channels and frequencies
* The primary use for these channels is repeater operation using
750 kHz offset. Channels 1-8 inclusive are used for mobile reception
and channels 31-38 for mobile transmission. Note that additional
channels 41-48 and 71-78 may also become available for repeater
operation to supplement channels 1-8 and-31-38 respectively as
approved by the ACMA CBRS Class Licence in Australia and the MED
GURL in New Zealand. This radio is user upgradable at no cost if the
Class Licence is amended to allow repeater use on channels 41-48
and 71-78. Details will be made available on our website on how to
upgrade the radio to use the repeater channels, if and when approval
by the ACMA CBR S Class Licence in Australia and the MED GURL
in New Zealand. In addition, any designated repeater channel may be
used for simplex operation in areas where it is not used for repeater
operation.
† Speech telephony shall be inhibited on these channels.
‡ At the time of production Channels 61, 62 and 63 are guard channels
and are not available for use.
Channels 5 and 35 (paired for Duplex repeaters) are reserved as
emergency channels and should be used only in an emergency.
CTCSS and DCS will not operate on these channels.
A list of currently authorised channels can be obtained from the ACMA
website in Australia and the MED website in New Zealand. Channel 11
is a calling channel generally used to call others and channel 40 is the
customary road vehicle channel.
Once contact is established on the calling channel, both stations should
move to another unused "SIMPLEX" channel to allow others to use the
calling channel.
UHF CB Radios normally transmit and receive on the same frequency
which is known as the simplex operation.
Channels 22 and 23 are for Telemetry and Telecommand use, voice
communications are not allowed on these channels by law.
Channel 9 and above are the best choices for general use in Simplex mode.
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