Radio Railway Communications

 
  aus.rail Chief Train Controller

Gday all,
   I have noticed at many railway station there are yagi antennas,
generally high up on steel posts, pointing to the next station on the line.
I have looked on the ACA database, and found quite a few frequencies in my
local area, generally from 408 to 419Mhz. Does anybody know what is
transmitted between stations? Data/telemetry or voice? I have also been told
that the security cameras on the stations have the images transmitted back
to the camera room (possibly at Redfern?) by radio, rather than telephone
line. Is this correct? Looking at the emission designators, 10K1F8WWN and
10K1F3E I read this as being a combination of analogue, and data
transmissions, with both designators. Is this correct?
Thanks in advance
Adam

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  aus.rail Chief Train Controller

"Adam"  wrote in message
news:69a2a.45497$jM5.114043@newsfeeds.bigpond.com...
> Gday all,
>     I have noticed at many railway station there are yagi antennas,
> generally high up on steel posts, pointing to the next station on the
line.
> I have looked on the ACA database, and found quite a few frequencies in my
> local area, generally from 408 to 419Mhz. Does anybody know what is
> transmitted between stations? Data/telemetry or voice? I have also been
told
> that the security cameras on the stations have the images transmitted back
> to the camera room (possibly at Redfern?) by radio, rather than telephone
> line. Is this correct? Looking at the emission designators, 10K1F8WWN and
> 10K1F3E I read this as being a combination of analogue, and data
> transmissions, with both designators. Is this correct?
> Thanks in advance
> Adam
>
>
I also should have added I am referring to Sydney
  aus.rail Chief Train Controller

Most smeg voice comms is on the GRN with a local (train-train,
train-station) frequency on 450.150 i think, probobly the best place to ask
this question would be aus.rail

Mike

"Adam"  wrote in message
news:cga2a.45500$jM5.113843@newsfeeds.bigpond.com...
>
> "Adam"  wrote in message
> news:69a2a.45497$jM5.114043@newsfeeds.bigpond.com...
> > Gday all,
> >     I have noticed at many railway station there are yagi antennas,
> > generally high up on steel posts, pointing to the next station on the
> line.
> > I have looked on the ACA database, and found quite a few frequencies in
my
> > local area, generally from 408 to 419Mhz. Does anybody know what is
> > transmitted between stations? Data/telemetry or voice? I have also been
> told
> > that the security cameras on the stations have the images transmitted
back
> > to the camera room (possibly at Redfern?) by radio, rather than
telephone
> > line. Is this correct? Looking at the emission designators, 10K1F8WWN
and
> > 10K1F3E I read this as being a combination of analogue, and data
> > transmissions, with both designators. Is this correct?
> > Thanks in advance
> > Adam
> >
> >
> I also should have added I am referring to Sydney
>
>
  aus.rail Chief Train Controller

On Wed, 12 Feb 2003 07:05:27 +1100, "Mike"
wrote:

>Most smeg voice comms is on the GRN with a local (train-train,
>train-station) frequency on 450.150 i think, probobly the best place to ask
>this question would be aus.rail

The statewide simplex is 450.050.

The Antennae to which you refer are for the MetroNet Train Radio
system, and they operate in the 418-419 MHz range.  They carry data
and voice.  Some of the data transmissions are:

Time Synch
Short Messages
Transponder pass information
Train and stock Numbers

I'm sure there's plenty of other stuff.

Russell Bryant's RailScan CDs have a lot more information if you're
interested - rusty@hermes.net.au

>"Adam"  wrote in message
>news:cga2a.45500$jM5.113843@newsfeeds.bigpond.com...
>>
>> "Adam"  wrote in message
>> news:69a2a.45497$jM5.114043@newsfeeds.bigpond.com...
>> > Gday all,
>> >     I have noticed at many railway station there are yagi antennas,
>> > generally high up on steel posts, pointing to the next station on the
>> line.
>> > I have looked on the ACA database, and found quite a few frequencies in
>my
>> > local area, generally from 408 to 419Mhz. Does anybody know what is
>> > transmitted between stations? Data/telemetry or voice? I have also been
>> told
>> > that the security cameras on the stations have the images transmitted
>back
>> > to the camera room (possibly at Redfern?) by radio, rather than
>telephone
>> > line. Is this correct? Looking at the emission designators, 10K1F8WWN
>and
>> > 10K1F3E I read this as being a combination of analogue, and data
>> > transmissions, with both designators. Is this correct?
>> > Thanks in advance
>> > Adam
>> >
>> >
>> I also should have added I am referring to Sydney
>>
>>
>


David Johnson
trainman@ozemail.com.au
http://www.ozemail.com.au/~trainman/
------------------------------------
These comments are made in a private
capacity and do not represent the
official view of State Rail.
C.O.W.S. Page 11.
  aus.rail Chief Train Controller

check aus.rail

in simple terms mainly in the sydney metro you will find 'train radio' for
cityrail, nothing to do with GRN
operates T band. complex sort of system.
There was a totally 2nd system installed by the former Freight Corp (known
own by the private Pacific National),
but there is lots of people on aus.rail that know all the ins and outs.

Adam wrote in message ...
>
>"Adam"  wrote in message
>news:69a2a.45497$jM5.114043@newsfeeds.bigpond.com...
>> Gday all,
>>     I have noticed at many railway station there are yagi antennas,
>> generally high up on steel posts, pointing to the next station on the
>line.
>> I have looked on the ACA database, and found quite a few frequencies in
my
>> local area, generally from 408 to 419Mhz. Does anybody know what is
>> transmitted between stations? Data/telemetry or voice? I have also been
>told
>> that the security cameras on the stations have the images transmitted
back
>> to the camera room (possibly at Redfern?) by radio, rather than telephone
>> line. Is this correct? Looking at the emission designators, 10K1F8WWN and
>> 10K1F3E I read this as being a combination of analogue, and data
>> transmissions, with both designators. Is this correct?
>> Thanks in advance
>> Adam
>>
>>
>I also should have added I am referring to Sydney
>
>
  aus.rail Chief Train Controller

Most of the yagi antennas are associated with the MetroNet Train Radio
system that covers the Electrified Area.

The system is based on secure data signalling protocols used by railways in
Europe, particularly the UK.  It uses 12.5 kHz spaced radio channels, FM
modulation and 1200 bd data using 1200 / 1800 Hz signalling to set up speech
calls between signallers / controllers and Drivers.  Communication with the
train radios is full duplex i.e. no need for PTT and "Over".  There is a
single Control Channel which uses timeslots allocated to each trackside base
station, for setting up calls, and a number of traffic channels for the
speech communications.  The system can also send SMS type messages as well
as Global messages such as EMERGENCY STOP.  Users do not have to change
channels or frequencies, this is done automatically by track mounted
transponders (in the 4 foot) which advise the train equipment of the correct
Area Number to use as the train passes over.

The system does not carry Station to Station comms these, as has been
reported, predominantly use 450.050 and GRN channels.

Hope that helps.

Me
  aus.rail Chief Train Controller

On Wed, 12 Feb 2003, Adam wrote:

> line. Is this correct? Looking at the emission designators, 10K1F8WWN and
> 10K1F3E I read this as being a combination of analogue, and data
> transmissions, with both designators. Is this correct?

10K1F8WWN: 10.1 Khz bandwidth, FM, two or more analogue channels,
a combination of voice or fax or data etc, a combination of signalling,
a combination of FDM and TDM.  Weird...

10K1F3E: 10.1 Khz bandwidth, FM, single analogue channel, telephony.

-- Dave
  aus.rail Chief Train Controller

I frequently hear dtmf tones and a sort of internal phone network on QR
freqs..along with train movements info..so they must run a double data and
voice network
"Dave Horsfall"  wrote in message
news:20030212125021.D20219@mippet.ci.com.au...
> On Wed, 12 Feb 2003, Adam wrote:
>
> > line. Is this correct? Looking at the emission designators, 10K1F8WWN
and
> > 10K1F3E I read this as being a combination of analogue, and data
> > transmissions, with both designators. Is this correct?
>
> 10K1F8WWN: 10.1 Khz bandwidth, FM, two or more analogue channels,
> a combination of voice or fax or data etc, a combination of signalling,
> a combination of FDM and TDM.  Weird...
>
> 10K1F3E: 10.1 Khz bandwidth, FM, single analogue channel, telephony.
>
> -- Dave
  aus.rail Chief Train Controller

More info for those interested in railways scanning:

http://rsa.four12.net/
http://www.railpage.org.au/vicrailscan.html

matts
  aus.rail Chief Train Controller

"matt"  wrote in message
news:XDI2a.46554$jM5.116936@newsfeeds.bigpond.com...
> More info for those interested in railways scanning:
>
> http://rsa.four12.net/
> http://www.railpage.org.au/vicrailscan.html
>
> matts
>
Gday,
I don't have a scanner at the moment (had to sell, needed $$) but is there a
site offering broadcasts of train radio? Preferably NSW area.

Steamy

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