<s>
UHF	B-Algorithm
CB	I-Algorithm
is	O
a	O
class-licensed	O
citizen	B-Application
's	I-Application
band	I-Application
radio	I-Application
service	O
authorised	O
by	O
the	O
governments	O
of	O
Australia	O
,	O
New	O
Zealand	O
,	O
Vanuatu	O
,	O
and	O
Malaysia	O
in	O
the	O
UHF	O
477MHz	O
band	O
.	O
</s>
<s>
UHF	B-Algorithm
CB	I-Algorithm
provides	O
77	O
channels	O
,	O
including	O
32	O
channels	O
(	O
16	O
output	O
,	O
16	O
input	O
)	O
allocated	O
to	O
repeater	O
stations	O
.	O
</s>
<s>
Operation	O
in	O
the	O
band	O
is	O
restricted	O
to	O
modes	B-Device
F3E	O
and	O
G3E	O
(	O
FM	B-Application
or	O
PM	B-Device
of	O
analogue	O
voice	O
telephony	O
)	O
except	O
for	O
channels	O
22	O
and	O
23	O
,	O
which	O
are	O
data	O
modes	B-Device
only	O
.	O
</s>
<s>
This	O
includes	O
overseas	O
personal	B-Application
radio	I-Application
service	I-Application
devices	O
because	O
they	O
do	O
not	O
share	O
the	O
same	O
band	O
plan	O
,	O
power	O
output	O
and	O
channels	O
as	O
UHF	B-Algorithm
CB	I-Algorithm
.	O
</s>
<s>
Many	O
UHF	B-Algorithm
CB	I-Algorithm
radios	O
allow	O
the	O
user	O
to	O
scan	O
channels	O
to	O
find	O
a	O
conversation	O
.	O
</s>
<s>
Several	O
different	O
scan	O
modes	B-Device
may	O
be	O
provided	O
:	O
</s>
<s>
UHF	B-Algorithm
CB	I-Algorithm
radios	O
can	O
be	O
set	O
to	O
be	O
completely	O
silent	O
until	O
they	O
receive	O
a	O
series	O
of	O
tones	O
matching	O
a	O
pre-programmed	O
sequence	O
.	O
</s>
<s>
The	O
use	O
of	O
CTCSS	O
is	O
not	O
permitted	O
on	O
UHF	B-Algorithm
CB	I-Algorithm
repeaters	O
or	O
the	O
designated	O
emergency	O
channels	O
.	O
</s>
<s>
The	O
following	O
channels	O
are	O
legislated	O
as	O
a	O
part	O
of	O
the	O
ACMA	O
UHF	B-Algorithm
CB	I-Algorithm
Class	O
Licence	O
.	O
</s>
<s>
Users	O
should	O
be	O
aware	O
that	O
UHF	B-Algorithm
CB	I-Algorithm
channels	O
31	O
to	O
38	O
and	O
71	O
to	O
78	O
are	O
the	O
'	O
input	O
 '	O
channels	O
for	O
repeaters	O
.	O
</s>
<s>
On	O
27	O
May	O
2011	O
the	O
channel	O
spacing	O
on	O
UHF	B-Algorithm
CB	I-Algorithm
was	O
changed	O
,	O
allowing	O
the	O
band	O
to	O
expand	O
from	O
40	O
channels	O
to	O
80	O
channels	O
.	O
</s>
<s>
New	O
Zealand	O
's	O
Personal	B-Application
Radio	I-Application
Service	I-Application
(	O
PRS	O
)	O
and	O
26MHz	O
Citizens	B-Application
Band	I-Application
radio	I-Application
are	O
very	O
similar	O
to	O
Australia	O
's	O
UHF	O
Citizens	B-Application
Band	I-Application
and	O
27MHz	O
Citizens	B-Application
Band	I-Application
services	O
.	O
</s>
