[TheList] Squawking Tones on Police Channel & High Frequency Tone on Channel

Mon Mar 21 09:53:30 AEDT 2022

What about in areas like Wellington where there are no analog channels
still operating?

On Mon, 21 Mar 2022, 11:44 Brendan Sheehy, <shiters_r_us at hotmail.com> wrote:

> Most still use the analogue channels to communicate with the local watch
> house.
>
> Get Outlook for Android <https://aka.ms/AAb9ysg>
> ------------------------------
> *From:* TheList <thelist-bounces at radiowiki.org.nz> on behalf of Radio
> Engineering <radio.restorations at gmail.com>
> *Sent:* Monday, March 21, 2022 11:28:29 AM
> *To:* thelist at radiowiki.org.nz <thelist at radiowiki.org.nz>
> *Subject:* Re: [TheList] Squawking Tones on Police Channel & High
> Frequency Tone on Channel
>
> Ok well that's understandable.
> How do CP units communicate directly with police in the P25 areas? I know
> in the analog regions they have a standard radio on the local police
> repeater channel.
>
> On Mon, 21 Mar 2022, 11:08 Darryl Healy, <darryl0768healy at gmail.com>
> wrote:
>
> They are encrypted due to a couple of issues with, you guessed it, scanner
> users who got too close for comfort and due to sensitive information being
> TX.
>
> I'm a part of another CP and we still use ESA.
>
> As for any CP having access to P25, NO WAY! That's a highly classified
> radio only limited to police, atleast for CP.
>
> On Mon, 21 Mar 2022, 10:35 Radio Engineering, <
> radio.restorations at gmail.com> wrote:
>
> Community patrol are encrypted? What the heck for? They do a good job, but
> their coms is mostly run of the mill stuff - nothing that requires
> secrecy.
> I presume they have a handheld P25 radio to communicate with police as
> well?
>
> On Sun, 20 Mar 2022, 21:27 Darryl Healy, <darryl0768healy at gmail.com>
> wrote:
>
> I assume corrections DMR will obviously be encrypted also?
>
> For those that don't know Chch INTL aviation security are on the Orion
> CON+ network and it works well for them having regional wide coverage and a
> repeater setup at the airport itself.
>
> Also all of chch intl is on this network including airport crash fire
> which aren't encrypted along with all the airline, servicing and cleaning
> comms.
>
> There is alot of interesting stuff on the Orion network including
> community patrol which have just gone encrypted.
>
> The network caters for hundreds of companies from florists, couriers,
> truck companies to alot of council work and then some...
>
> On Sun, 20 Mar 2022, 14:18 DogSec - Richard, <richard at dogsecurity.co.nz>
> wrote:
>
> Hard to say...  but most likely that will be the case, yes you'll no
> longer hear police.
>
> The Government is bringing in NGCC (Next Gen Critical Communications)
> network which will be P25, Cellular and IP based telecommunications setup,
> similar to Australia, America, etc.  The ESA/UHF analog networks will be
> shut off.
> It will have Police, FENZ, St John, WFA, and possibly CivDef etc.  It's
> possible that some or all of it will be encrypted, that will be up to each
> orgainization.  I'd imagine that it will follow along with the current
> Auckland, Wellington, Wairarapa and Canterbury setups where Police are
> encrypted.  But that could change as happened in Victoria on the MMR/RMR
> networks (basically speaking MMR is UHF, RMR is VHF)  where Ambulance were
> unencryped, but that's changed and is now encrypted..  Encryption is done
> on the subscriber unit - P25 supports encryption.
>
> The current P25 network I understand to be owned by the Police, this new
> network will not be.  I would assume that the Police will sell their
> equipment so they no longer have to worry about the repeater networks
> falling over, that would become the NGCCs problem, but they would keep
> their current radio techs as they still need people on the ground looking
> after vehicles/handhelds... I will also assume that NGCC won't have any
> interest in dealing with subscriber units as it's a lot to manage - they'll
> have enough on their plates to deal with, running a national trunking
> repeater network. I also assume that Police will want to keep their
> codeplugs close to their chest.  FENZ/Police have their own radio techs, so
> it'd be business as usual for them, except no more repeater work - they're
> multi talented in that they do radio, telephony and IT stuff.  St John use
> Vital for repeaters, but contract Tait to subcontract radios, each Civil
> Defence area seems to do their own thing for radio work.  I don't know much
> about WFA other than they use a couple of talkgroups on the Wellington P25
> network.  Others that could join would be government departments...
> Aviation Security, MBIE (Immigration etc)   I will assume that Corrections
> will remain as they are with their current LTR setups that are moving over
> to DMR as they really need prison specific coverage, and keep the prisoner
> transport vehicles on Vital.
>
>
>
>
> On 20/03/2022 1:24 pm, Tim Devaney wrote:
>
> Are we not going to be able to receive the police soon ??
>
> On Sun, Mar 20, 2022, 12:09 DogSec - Richard <richard at dogsecurity.co.nz>
> wrote:
>
> Hi BJ,
>
> Years ago someone did a write-up about it on here, but basically it's a
> form of SCADA for monitoring sites remotely.  Some sites are often not easy
> to get to and may have access issues such as being helicopter access only.
> These sites have quite large battery banks, as mains power may be flaky.
> The SCADA allows for inputs and outputs to be monitored remotely.  They are
> often polled at specific times, which is why sometimes you may hear the
> tones underneath voice comms.  If the controller polls and doesn't get a
> response back then it will retry X amount of times (if programmed) then
> assumes the site is dead, and alerts get generated.  A variety of things
> can be monitored. Often these are only 'analog' inputs so you only get very
> specific details..  You could see things like
>
> Battery Bank A is 100/75/50/25% (maybe not even in that much detail)
>
> Generator On/Off
>
> Entry Door OPEN/CLOSED
>
> Alarm ACTIVATED/DEACTIVATED/IN ALARM
>
> SOLAR ON/OFF (IE is there voltage coming into the system on the Solar
> lines)
>
> REPEATER POWER ON/OFF  (some repeaters can have an output that's activated
> when it's in a certain state)  As Daryl mentioned, it would be a (probably
> unreliable) way of determining if a repeater is working or not.
>
> With the NGCC being implemented, a lot of this will eventually become
> redundant as most things like SCADA would be converted to IP based, and
> digital radio is also IP based, meaning a lot of this could be sent over a
> text message over the radio network.  I assume P25, but DMR will prioritize
> voice over messaging.
>
> As for the screeching, lots of factors could be causing that.  I-band
> links shouldn't really be used for monitoring as they're only
> point-to-point or point-to-multipoint links meaning you really need to be
> in line of the path for it to be received. I'd recommend use the VHF/UHF
> frequencies.  Once again, with things turning to digital soon, they'll
> probably be redundant with the links will be done over IP.
>
> Cheers,
>
> Richard
> On 20/03/2022 11:23 am, Darryl Healy wrote:
>
> Those tones are something to do with the linking with all the VTGs.
>
> They happen every 4 hours at midnight and so on.
>
> Someone will no doubt give a more technical explanation of them soon.
>
> On Sun, 20 Mar 2022, 11:01 BJ, <bjcuizon151 at gmail.com> wrote:
>
> Hi all,
>
> Was in Dunedin recently and tuned in to police comms. Anyone know what
> those squawking tones on some police channels are? It doesn't sound like
> fire selcall but more like a really short (~1 sec) burst of what sort of
> sounds like a part of the old dial-up handshake.
>
> Also, was listening to firecom and ambo thru the I-band link in Chch and
> on some link channels there is a really high pitched tone that is present
> when someone keys up. It can only be heard on a radio with no audio
> filtering/DSP as my Tait seems to cancel it out. Does anyone have an idea
> what this is as well?
>
> Thanks in advance,
> BJ
> _______________________________________________
> TheList mailing list
> TheList at radiowiki.org.nz
> http://radiowiki.org.nz/mailman/listinfo/thelist_radiowiki.org.nz
>
>
> _______________________________________________
> TheList mailing listTheList at radiowiki.org.nzhttp://radiowiki.org.nz/mailman/listinfo/thelist_radiowiki.org.nz
>
> _______________________________________________
> TheList mailing list
> TheList at radiowiki.org.nz
> http://radiowiki.org.nz/mailman/listinfo/thelist_radiowiki.org.nz
>
>
> _______________________________________________
> TheList mailing listTheList at radiowiki.org.nzhttp://radiowiki.org.nz/mailman/listinfo/thelist_radiowiki.org.nz
>
> _______________________________________________
> TheList mailing list
> TheList at radiowiki.org.nz
> http://radiowiki.org.nz/mailman/listinfo/thelist_radiowiki.org.nz
>
> _______________________________________________
> TheList mailing list
> TheList at radiowiki.org.nz
> http://radiowiki.org.nz/mailman/listinfo/thelist_radiowiki.org.nz
>
> _______________________________________________
> TheList mailing list
> TheList at radiowiki.org.nz
> http://radiowiki.org.nz/mailman/listinfo/thelist_radiowiki.org.nz
>
> _______________________________________________
> TheList mailing list
> TheList at radiowiki.org.nz
> http://radiowiki.org.nz/mailman/listinfo/thelist_radiowiki.org.nz
>
> _______________________________________________
> TheList mailing list
> TheList at radiowiki.org.nz
> http://radiowiki.org.nz/mailman/listinfo/thelist_radiowiki.org.nz
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://radiowiki.org.nz/pipermail/thelist_radiowiki.org.nz/attachments/20220321/a261417d/attachment-0001.html>