expanding north

[Longreach]

Hi all, All the new Zone 3 stuff shows the relevant id's provided there transmitting in the vote group Grant . i am noticing that the console id (1 down this way) is slowly dissappearing, it went some time ago in Z3 Ch 137 (Goulburn vote) and recently (last week or so) on Z3 Ch 67 (Yass Vote).
cheers all
Matt

[cartman]

From high above Flynns Beach last night (at my sisters) using two hand held radios (PSR-800 and Uniden 246) I could hear

468.0125 P25 - NAC 61F - Dispatcher & Patch RID "1" Tx Mt Yarrahapinni (Signal seemed to distant - ie pointing away) - "OSCAR"
468.0750 Analog - 107.2 CTCSS - Tx Mt Cairncross Port Macquarie - "OSCAR"
468.1500 Analog - 107.2 CTCSS - Tx Mt Yarrahapinni - "OSCAR"
468.2000 P25 - NAC 61F - Dispatcher & Patch RID "1" - Tx Coffs Harbour - "OSCAR"
468.3875 P25 - NAC 61F - Dispatcher & Patch RID "1" - Tx Bowra Sugarloaf - "OSCAR"
468.7250 Analog - 107.2 CTCSS - Tx Mt Cairncross Port Macquarie - "OSCAR"
468.7625 P25 - NAC 61F - Dispatcher & Patch RID "1" - Tx Nambucca Heads - "OSCAR"
468.8875 Analog - 107.2 CTCSS (Weak Distant signal) - Tx Ballina - "PAPA"
469.3250 P25 - NAC 61F - Dispatcher & Patch RID "1" - Tx Mt Coramba Coffs Harbour - "OSCAR"

RIDS noted for Macksville 27, Kempsey 23, Coffs 14, Bowraville 28 on their local sites whereas previously only "1" was appearing

Transit Hill shielded this signal being received at Flynns Beach
469.3750 P25 - NAC 61F - Dispatcher & Patch RID "5" - Tx Middle Brother Mountain - 'NOVEMBER"

[cartman]

Update on Oscar around Port Macquarie

ZONE 3 VOTE 127 Common Input 459.0125Mhz
468.1375 Mt Cairncross Port Macquarie
468.5125 Jolly Nose Hill Port Macquarie - Now Active late Jan 2013
468.8375 Transit Hill Port Macquarie - Now Active late Jan 2013
468.9625 Yarras Mt Seaview
469.3375 Middle Brother

Both 468.5125 and 468.8375 are sharing the same radio id on my PSR-800 - an interim measure ?


Grant

[ivahri]

We do the same Grant. My guess is they are sharing the same P25 gateway and running up on the same link. The ID you would see on the "outbound" is the gateway ID. We are just starting at 2000001, then 2 etc. Are the Police doing the same?

Cheers,

Richard

[cartman]

Yes I think so
The radio id being shown is just a normal 6 digit one in the same range as other users in the area eg 212xxx.
Is the "gateway" the same as the Motorola DIU3000 ?
I have heard that these are used by the police to tie together the audio stream from multiple sites, especially where it is a mixture of analog and p25 like on November and Oscar

Grant

[ivahri]

Hi Grant,

It would use an ID in the same number range.

The "gateway" is essentially a P25 to analogue converter. If it is a Tait supplied unit it is a TB9100 base without the RF, just the ethernet portions of the base. The current consoles are analogue so the signalling used is MDC1200 (as they are Motorola consoles). The gateway converts the P25 signalling to MDC1200 & vice versa. By signalling I mean radio ID, emergency call, radio inhibit/enable etc. The Police guys have some custom stuff as well- I don't know how they have resolved those. In theory when the Police & other agencies move to P25 capable IP based consoles (orders have been placed I'm told) then the gateways may become redundant. Patching of any networks is still done in the consoles... For now there needs to be a gateway for each P25 conventional network- and a single network can have multiple votegroups. For example the FRNSW Monaro network has 2 votegroups, so it uses a single gateway. The streaming/routing of the data (voice) to each votegroup is done by the router at the network access point(s). The police techs here can describe their networks better than I can but I believe we are generally doing things the same way as they are.

Cheers

Richard

[cartman]

Heard while listening to the RR audio feed for the North Coast "Wireless 34" liaising with a Bellingen car testing VHF links
First time I heard a "wireless" callsign ... normally it is "radio xx"

Grant

[Bigfella237]

Nah I've been hearing those callsigns a fair bit lately (maybe the last couple of months), I just assumed maybe a contract change had taken effect or something like that? Maybe somebody just felt like a name-change, a change is as good as a holiday?

[Longreach]

Yeah i first heard the 'wireless' callsigns from the Wagga techs a couple of months ago. at first i thought they were 'taking the piss' but then i heard it going round and then the Cooma techs started I thought it might be a change. I notice too you hear the techs calling off and on from radio sites now, you never used to.
At a guess its probably to get away from the radio callsigns to stop confusion?
cheers
Matt

[Garry]

funny how things change,, back in the early 90's in Newcastle, the wireless callsigns were used by a detective task force set up to catch a group of Club Bandits