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Frequently Asked Questions
Below are answers to frequent questions received by email
The NSW Government Radio Network (GRN) is a digital P25 (or APCO-25) trunked radio network managed by the NSW State Government, operating primarily between 403MHz and 425MHz. It is the main radio network used by emergency services and state government departments within the coverage area.
The NSW GRN is used by the majority of the NSW emergency services and state government departments who require wide-area communications within the coverage area. The most notable exceptions are the NSW Police Force and Sydney Buses who both operate their own extensive conventional radio networks.
The network covers more than one third of New South Wales (NSW), as well as the majority of the Australian Capital Territory (ACT). Click the image below for a recent coverage map.
A Talkgroup ID (TG or TGID) is a unique number (on the NSW GRN it is normally 5-digits in length) which allows each individual radio that is programmed with that talkgroup to communicate with other radios programmed with the same talkgroup over the network. TGID's will be heard on GRN sites when a radio programmed with a TGID that is in use is within range of that site. If a GRN radio programmed with a TGID is not using the GRN site you are scanning you will not hear that talkgroup.
NSW GRN TGID's are allocated to users in blocks, for example talkgroups in the 101## range are allocated to Fire & Rescue NSW, with TG 10101 being a group (channel) which is used for part of the Sydney region.
As a further example of how the network operates, the above Fire & Rescue NSW talkgroup will likely be heard on most Sydney GRN sites as there would be radios in use with this talkgroup using those sites. However it would be unlikely this talkgroup to be heard on Bathurst sites - unless a radio using that site is currently switched to that talkgroup.
The Radio ID (RID) number is a unique number (on the NSW GRN it is generally 7-digits in length) assigned to each individual radio attached to the network. RID's are useful for monitoring users when using PC trunking software (such as UniTrunker) to monitor GRN sites. This information is now also displayed on the latest scanners, such as the UBCD396XT.
NSW GRN RID's are allocated to users in blocks, for example RID's in the 200#### range are allocated to Fire & Rescue NSW.
To scan the NSW GRN you will need a radio scanner capable of decoding a 400MHz P25 trunking system with a 9600 baud rate. Uniden Australia, as well Uniden America, GRE, RadioShack and other scanner manufacturers produce scanners that will track digital trunking systems such the NSW GRN.
Basic programming suggestions for the UBCD396XT, as well as the older UBCD996T (base/mobile) and UBCD396T (handheld) can be found on the nswgrn.com site here.
For other scanner makes and models please follow the programming manual provided with the scanner.
A complete list of current control channels (CC) can be found on the nswgrn.com site here. Specific control channel (CC) information can be found on numerous websites on the internet and by searches on the ACMA website. This website concentrates on talkgroup and RID information and has no plan to provide specific control channel (CC) information.
This website does not list PMR/conventional/'frequency' information and concentrates solely on talkgroup (TG or TGID) and RID information for the NSW GRN. There are no plans to include PMR information on this site in the future as this information can be found on numerous websites on the internet and by searches on the ACMA website.