North SydneyCouncil

[Chrisco]

I was googling and found this tender doc from nth sydney council "suppy of 37 digital two way radios" dated 12/10/09
TR pty ltd after google shows up to be bearcom
http://www.northsydney.nsw.gov.au/resou ... G01128.pdf

[cartman]

Very hard to get any more information on this tender, though I do understand from discrete inquiries that the digital network quoted in the tender is in fact the 800Mhz Zeon TETRA system.

Grant

[crafty]

Hi
Reference to Coffs Harbour City Council wanting setup a P25 system:

Higher levels of occupational health and safety by implementing an IP based P25 digital two way system which gives unprecedented coverage for all our staff in the field

http://www.gobroadband.org.au/node/112

cheers Allison

[cartman]

Their IP based P25 is dependent on the rollout of the National Broadband Network ... like waiting for snow to fall ... a long wait
Wouldn't it be easier to stick a P25 repeater on top of Point Lookout/Ebor 1000 metres up
They would have coverage from Port Macquarie to Grafton from up there


Grant

[Chrisco]

The AMCA listed freq for nth sydney is 467.0250mhz all I can pick up is data type noise. mototurbo???

[ivahri]

Grant,

They will need more than one base to cover the Coffs LGA. They already have a number of analogue bases so it wouldn't cost them much to upgrade to P25 conventional. I have a premonition that they will be Tait TB9100 bases... just a hunch.

Cheers,

Richard

[ivahri]

Pity they don't have fibre to the hilltops... definitely written by a IT/PR geeky person but the P25 is just a throw away line anyway. You don't need fibre to link P25 bases... in fact that is a definite point of failure in places like Coffs.

Cheers

[centralcoastscanman]

ROIP would be good, but unless setup properly wouldn't even bother attempting it as numerous failure points

1) link failing and no redundant links
2) the network link being congested and the quality of transmissions deteriorating

it would offer better quality if they did run it over fibre in comparison with normal copper wire technology

[ivahri]

But they don't have fibre to the hilltops so the point is moot. Running fibre up rocky mountains is never a good idea... hideously expensive & hideously exposed to fail. I'm sure this story was written more for PR than anything else. A few new digital RF links between the hilltops and a few new base and they will have a P25 network.

Cheers,

Richard

[ivahri]

ROIP would be good, but unless setup properly wouldn't even bother attempting it as numerous failure points

1) link failing and no redundant links
2) the network link being congested and the quality of transmissions deteriorating

it would offer better quality if they did run it over fibre in comparison with normal copper wire technology

Single points of failure is pretty standard in the bush. Sometimes it is hard to get one reliable link path in to a site let alone two (I have that problem at Mt Ulandra). We got around it now by using "back doors" to our RoIP network but still if an RF link fails it fails. Very few networks in the bush have any redundancy, not even the plods.

By the way RoIP usually work over an ADSL based service. ADSL needs copper at the ends, no copper no ADSL (so we discovered). We haven't seen any evidence of transmissions deteriorating but we aren't using commercial ADSL. We have the odd drop outs, probably a couple a week. We ping our services every 20 minutes (a bugger finding a tech who would work 24/7...) and most of the time it only lasts long enough to miss one ping. It is rare now for the boys to even notice it, and even then it usually is just an NTU needing a reboot (done remotely).

Cheers,

Richard