Oricom ULTRA550, Operating Instructions Manual

This unit complies with all relevant Australian and  

New Zealand approval requirements 
AS/NZS 4365: 2011 including radio communications  

(NZS2772.1 for human exposure) standard 2003.

Why has the ACMA increased the number of available UHF CB channels?

To provide additional channel capacity within the UHF CB Band, the ACMA will over 

the next 5 years, change the majority of the current wideband 40 channel use to 

narrowband 80 channel use.
During this time wideband channel use will be gradually phased out as users 

upgrade their existing radios.
This means that the new Oricom narrowband radio you have purchased will have more 

channels than older wideband radios. Some of these channels are locked and cannot 

be used (see the channel chart for more information).

When did this take place?

Early in 2011, new AS/NZS Standards came into effect allowing operators to use 

additional narrowband channels and also use narrowband transmissions on some 

current wideband channels. This increased the number of channels up to 80, 75 of 

which are usable voice channels. 

What issues may users experience during the transition phase?

When a new narrowband radio receives a transmission from an older wideband 

radio the speech may sound loud and distorted – simply adjust your radio volume 

for the best listening performance. 
When an older wideband radio receives a signal from a new narrowband radio 

the speech may sound quieter - simply adjust your radio volume for best listening 

performance. When operating a narrowband radio or channel 41 - 80 interference is 

possible from wideband radios transmitting on high power or an adjacent frequency. 
The issues described above 

are not a fault of the radio

 but a consequence of mixed 

use of wideband and narrowband radios. 
It is expected that as older wideband radios are removed from service that this issue 

will be resolved. 
Most radios in use will be narrowband eliminating this issue.

This information is current at time of printing. For further up to date information 

please visit www.acma.gov.au.

Oricom connecting you now.

R-NZ