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

Mon Mar 21 09:07:38 AEDT 2022

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
>>>>> _______________________________________________
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