P25 Talk Groups part 2

cartman · Post by **cartman** » Thu Dec 15, 2011 10:04 am

Found out the reason why the ferry skippers call out "leaving Mortlake" on Talkgroup 10902 (Channel 2).

http://www.maritime.nsw.gov.au/docs/cvd ... eFerry.pdf

Memorandum of understanding between Waterways, Sydney Ferries and Mortlake Punt crew dated 2003- in order to avoid collisions and delays.

Grant

Post by **scanSydney** » Sat Dec 17, 2011 2:37 pm

cartman wrote:Hearing early this morning (like 4am) off Pennant Hills what appears to be a RFS PMR Bridge on Talkgroup 20023 (RFS-Northern Region-GD78) but no audio .... just lots a clicking noises every few minutes

Have been hearing this for a few weeks now. It sometimes pops up quite frequently, with a bit of a click and static. Never heard anyone actually speak on it yet!

lxth7 · Post by **lxth7** » Sat Dec 17, 2011 4:33 pm

I work in mortlake and travel to gladesville regually using the punt. So when Im planing a trip Ill listen for that call ,then i roughly now how long Iv got to get to the line for the next trip.

Post by **matthewn1983** » Tue Dec 27, 2011 10:53 am

Just having a look back at the NSWAS posts http://scansydney.com/board/viewtopic.p ... =380#p9050 and found an older document with some tones for the Non-GRN channels, they most likely now on a P25 channel, but something to keep an eye out for, unless someone can update with latest info.

3 TUNNEL 416.0625 151.4 (various rail tunnels)
5 PUTTY 414.6875 151.4
25 OLYMPC PK 415.0875 NONE
26 COM/CNTRL 467.6750 107.2
27 HELICPTR 467.6750 NONE

ivahri · Post by **ivahri** » Tue Dec 27, 2011 3:02 pm

3 & 25 are definitely unchanged & I suspect the others are still analogue as well. 3 will be replaced by a trunking site at a date unknown...

Are you sure channel 3 is the rail tunnels? My understanding is that this freq is used only in the Lilyfield light rail tunnel.

Cheers,

Richard

cartman · Post by **cartman** » Tue Dec 27, 2011 3:37 pm

wasn't 3 the Sydney Harbour Tunnel originally?
As far as I understood it the Ambos and Firies have always had six channels (1 control + 5 voice) available in the underground rail system - just a change from analogue to P25

Grant

cartman · Post by **cartman** » Tue Dec 27, 2011 3:42 pm

lxth7 wrote:I work in mortlake and travel to gladesville regually using the punt. So when Im planing a trip Ill listen for that call ,then i roughly now how long Iv got to get to the line for the next trip.

In the peak hour I have noted on Unitrunker that they call every 15 mins and always the same radio id - like somebody gets off the boat and activates a radio on Mortlake wharf.

Grant

Post by **matthewn1983** » Tue Dec 27, 2011 4:30 pm

Ah ok, this was the list ACMA search spat out, so the (various rail tunnels) i posted is incorrect? And is now taken over by GRN site.

1219570-2241775 416.0625000 MHz 10K1F9W Railway Station KOGARAH (5371)
1219570-2241776 416.0625000 MHz 10K1F9W Railway Station HURSTVILLE (5386)
1219570-2227592 416.0625000 MHz 10K1F9W Delhi Road Underground Delhi Road Underground Rail Station MACQUARIE PARK (134145)
1219570-1214840 416.0625000 MHz 10K1F3E Wynyard Underground Rail Station SYDNEY (200836)
1219570-1411284 416.0625000 MHz 10K1F3E Museum Underground Rail Station SYDNEY (200839)
1219570-1411285 416.0625000 MHz 10K1F3E Railway Station BONDI JUNCTION (3736)
1219570-1411286 416.0625000 MHz 10K1F3E Railway Station KINGS CROSS (3540)
1219570-1411287 416.0625000 MHz 10K1F3E Underground Railway Station REDFERN (3457)
1219570-2241778 416.0625000 MHz 10K1F9W Sutherland Railway Station SUTHERLAND (5507)

Just looked at http://web.acma.gov.au/pls/radcom/site_ ... ID=9014511 and doesn't display 416.0625, unless im looking at wrong Site ID?

ivahri · Post by **ivahri** » Tue Dec 27, 2011 6:26 pm

Sorry Matt, I must have got my facts wrong on Lilyfield... but I'm not sure if Ambos still have conventional bases in all of these locations. Could these now be GRN channels as they are licenced to Telco? The modulation shown is 10K1F9W... that isn't analogue FM but to my knowledge Ambos haven't rolled out P25 conventional bases...

Cheers,

Richard

ivahri · Post by **ivahri** » Tue Dec 27, 2011 7:03 pm

cartman wrote:wasn't 3 the Sydney Harbour Tunnel originally?
As far as I understood it the Ambos and Firies have always had six channels (1 control + 5 voice) available in the underground rail system - just a change from analogue to P25

Grant

Hi Grant,

They are part of the GRN so not just available to those agencies... many years ago there were some Tait bases, Smartbridges, & MCS2000 rolled out in Sydney Harbour Tunnel, Stadium Australia, Lilyfield, & Mt Poppong for Ambos & Firies but these have been or are going to be gradually upgraded to trunking or to some other P25 solution.

Cheers,

Richard

scanSydney

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