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Re: Railways digital system coming
Posted: Sat Feb 01, 2014 8:38 am
by cartman
The switch to digital is still two years away ... i asked the experts
Re: Railways digital system coming
Posted: Tue Feb 18, 2014 8:06 pm
by Mike Alpha
cartman wrote:The switch to digital is still two years away ... i asked the experts
I notice these sites aren't showing up on ACMA. Will they ever, or is it just too early?
Mike
Re: Railways digital system coming
Posted: Thu Feb 20, 2014 10:12 am
by citabria
Possibly they're covered by a spectrum license?
Re: Railways digital system coming
Posted: Thu Feb 20, 2014 11:08 am
by rustynswrail
citabria wrote:Possibly they're covered by a spectrum license?
Correct.
R
Re: Railways digital system coming
Posted: Thu Oct 08, 2015 9:49 pm
by Mike Alpha
I picked up a transmission on 418.550MHz near Yagoona railway station the other day. I think it was a railway comms operator asking a driver to look out for a reported hole in the fence near Belmore railway station and give him a sit-rep on the size of the hole etc.
There were signalling tones before and after each "over", but each conversation was one long full duplex transmission - no keying on or off - like a phone call.
ACMA shows that frequency appears at many railway station with complicated links to other frequencies at different sites.
What was I hearing and Is this what the digital rail comms system will replace?
Mike
Re: Railways digital system coming
Posted: Fri Oct 09, 2015 4:15 am
by cartman
Sounds like the metronet - Signaller to Driver
Yes the GSM-R is replacing the Metronet
Re: Railways digital system coming
Posted: Fri Oct 16, 2015 12:51 pm
by cartman
Found this
http://acma.gov.au/~/media/Spectrum%20L ... %20pdf.pdf
The implications seem to be:
Current = Analog 400Mhz Metronet
2016-2018 = Digital 1800Mhz GSM-R
Post 2018 = Digital 400Mhz TETRA
Re: Railways digital system coming
Posted: Fri Oct 16, 2015 3:28 pm
by rustynswrail
Assignments in the 460 MHz band have already be made employing a TETRA platform.
R
Re: Railways digital system coming
Posted: Fri Oct 16, 2015 5:07 pm
by cartman
Well UGL have installed GSM-R in the existing tunnel but its not turned on yet, hence my observations.
Not whether it is feasible ... just a lot of $$$ being spent.
Three systems over 3-4 years for 13km of track
Re: Railways digital system coming
Posted: Fri Sep 16, 2016 8:33 pm
by cartman
From a DTRS one page sheet handed out at the I & S Expo 2016 at the Australian Technology Park in August.
DTRS NETWORK
* 2 x fully diverse core main switching centres
* 266 base stations
* 98 dispatcher terminals
* 30 signal boxes
* 850 electric train cabs
* 77 NSW Trainlink diesels
* >1200 ICE freight and heritage
* Coverage throughout network and interfaces - Main lines, yards, depots, tunnels, other networks
* Platform for European train control system Level 2 (in-cab signalling), ATP and Asset data capability
* 2500 simultaneous calls. 5 second call establishment time.
DTRS running live on Tangara "T" sets and progressively being rolled out to other sets at various locations
Metronet still live but gradually being phased out as cabs migrate to DTRS