Brockville Police New system cut over

[PeterTrent]

Well the locals have new toys to play with.It doesn't appear to be p25.Maybe Motorola's new business system? with encryption? Lets see now 1990's they were encrypted .In the 2000's they had inversion . Then a breif flig with rolling code ,then in the clear now ???

 

[Jammin_Jay]

They did have the same radio service provider Time/MCI . The same with SmithsFalls and Perth PD, and they both have voice inversion and the same rs provider. Check the 141.585 frequency in brockville, sometimes they use that as a secondary testing channel when working on the radios, so the 142.935 is available for local police comms. 141.585 is simplex i believe. I know Smithsfalls was using Rolling code at one time, and had audio decyphering problems at random intervals, then it became just straight inversion. Sometimes , i could hear a sudden inverted inversion when i was in brockville listening when they had straight inversion. What i mean is the audio would revert in the middle of the transmission for about 2 seconds, then go back to normal, so those words during the 2 seconds would always get a "10-9" from dispatch "you were garbled for a few, could you repeat the 10-29 or what ever info was". My guess is that they know they are in the clear and was advised from the radio service provider, and it may be short lived. So they would just act accordingly until they get things fixed or something new is to come along.

 

[dmitton]

They appear to have a new system being cut over. Over the last couple of days I have been hearing bursts of tone (digital?), along with test count-down messages and some clear (un-encrypted) transmissions.

I found this thread as I was searching for any technical details of the changes.

 

[LordJ]

Listened again tonight.. it doesn't sound like the old des system, and it's not inversion... Jay, maybe you can get us some more info on it?

 

[dmitton]

They appear to be having trouble with the new system. Everyone is switching from "secure" to "clear". I think this is a common problem, low signal strength really really seems to impact encryption ... no matter which format it is.

 

[Forts]

Is it digital? Perhaps its MotoTRBO. Lots of users starting to migrate to TRBO around here

 

[dmitton]

Another local identified an MDC1200 ID at the end and a 141.5 PL tone. His opinion is that if it was really digital they wouldn't need these. So, we see what else develops.

 

[mikewazowski]

Another local identified an MDC1200 ID at the end and a 141.5 PL tone. His opinion is that if it was really digital they wouldn't need these.

141.5hz is not a valid pl tone so I think he's mistaken in his assumption that they aren't digital.

 

[Jammin_Jay]

It may be motoTRBO as mentioned, it's beginning to sound a lot like it. I will have to look further into this to determine what it is. And if it is, then us scanner users will be out of luck.

 

[LordJ]

It is still transmitting with a pl of 141.3.

 

[dmitton]

They are just in the process of moving everyone from "secure" to "clear" again.

It seems its only the "secure" transmissions that use the (141.3) PL.

 

[exkalibur]

Can you not just purchase a MotoTRBO radio and program for RX only - just the same as you can for an Astro radio?

 

[smittyj77]

I just heard this morning on my 996 the garble. Was listening for a while then actually at one point heard the dispatcher say 10-4. So if it is MotoTRBO how could we any of the conversation then?

 

[smittyj77]

Just looking around. And I dont know if anyone else knows what MotoTRBO is but here is the webiste. Looks like IP address system? ALmots like iDEN? Also noticed GPS capability.

MOTOTRBO

 

[smittyj77]

Just heard Brockville Police dispatcher say "Just a reminder when ever you turn the vehicle off you will have to turn the encryption off"

So maybe they are encrypted now?

 

[mikewazowski]

I just heard this morning on my 996 the garble. Was listening for a while then actually at one point heard the dispatcher say 10-4. So if it is MotoTRBO how could we any of the conversation then?

Chances are it's not MotoTRBO if you're hearing garble.

The 996T doesn't recognize TRBO signals so all you hear is digital noise and sync packets.

The 996T should also skip over P25 encryption so it's probably not a P25 based signal either.

 

[mikewazowski]

Can you not just purchase a MotoTRBO radio and program for RX only - just the same as you can for an Astro radio?

Theoretically it is possible.

However, you've got quite a few variables to work through such as colour code which would take some time.

Then you've got encryption capabilities as well.

Since it's not a trunking system, you'd just have to set your tx frequency to something other then the correct frequency.

 

[smittyj77]

It does sound like white noise/digital noise. At times there is a clucking garble noise and at times you can hear the conversation.

Weird

 

[Jammin_Jay]

Perhaps someone could save an audio sample, and play it on here, so we can determine the possible modulation scheme being used.

 

[LordJ]

Ask and ye shall receive. Here is a mobile unit transmitting to the Base. The Base is transmitting in the clear (not in this sample). So, they are talking back and forth, one encrypted and one not. Transmitting the pl tone as well. Also the same 'end noise' that has always been there..