Private

[Al42]

Re: Radio ID numbers and the MPSCS

Using two radios the PRO-96 and a base PRO-2096, one linked for the data and the other for simultaneos audio ive tried to figure out what car numbers belong to what radio ID numbers.

Q: Is their a sequential numbering system in place for each radio ID?

That entirely depends on the system thought up by whomever thought up the individual department's (or city's or county's) system. The ID number you hear used for a particular car (1 Adam 12, etc.) has absolutely nothing to do with the radio system used, unless the person designing the system wants to use some number having to do with the system as the radio number. (Which would usually be a very stupid thing to do, since the operations of the people involved have nothing to do with the radios, unless we're talking about the radio shop.)

Ex: I chesterfield, MI the all of chesterfields radio Id numbers start with 250 followed by their 4 digit number. Chesterfield is in the MSP district 2 and Macomb County is number 50. Is this a coincidence or is this the pattern for numbering on the MPSCS?

No idea, but it could be that way - it sounds reasonable. You'd have to ask someone who has something to do with the system, or someone who has asked someone ...

 

[rdale]

"Q: Is their a sequential numbering system in place for each radio ID? "

My Lansing Fire radio receives talkgroups 33LFD1-5, and the radio ID's are 133xxxx so D1 makes sense and county 33 I assume...

- Rob

 

[BaLa]

anyway you could start a new thread instead of hijacking mine?

 

[topcats69]

Dumb question.

I have heard some police officers in my area, say 'let's go to private'.

What does that mean exactly?
and is there anything that would allow me to listen to them legally? :lol:


Somebody told me it's a 'coded' frequency and there are descramblers you could get. He also told me they were legal.


Anybody know anything about this?

Here private mean going to a car to car channel. or talk around.

Willmar,mn

 

[Buckskinner33]

BaLa:
After looking at the FCC listings for your area and on this site, I belive that a TA mode is being used. (No repeaters being used)

Your county has no trunking systems listed. It could also mean that your town and St. Roberts also share a Mutual ALL call but that requires you to listen for that.

If I was you I would start looking here: http://www.radioreference.com/modules.php?name=RR&action=cfcc&xid=1563&t=2

I would start plugging in input freqs as well as the output freqs to listen for the TA. I would do the same for St. Roberts.

Write down what you think is either a TA or just a cop close by. It would help if you had another scanner to deduct just repeater input from talk around. You could go off what the RR DATA base has if you trust whats in there.

Sorry for Hi-Jacking your Thread. Remeber this is how we become better users by asking questions. Hell I learned more about my system from this thread alone. Looks like I'm getting a new scanner just to listen to private calls.

Let us know what you find out. POST IT! Missouri has a lot of holes in the Database. I know I would use it since I have a lot of family in your neck of the woods.

 

[poltergeisty]

Re: Radio ID numbers and the MPSCS

Using two radios the PRO-96 and a base PRO-2096, one linked for the data and the other for simultaneos audio ive tried to figure out what car numbers belong to what radio ID numbers.

Is this for "I-Calls" on -EDACS- or is this for a trunker app.?



To anyone: In a Moto. type II system, when I-Calls are used as in 9600 or 3600 baud regardless if the scanner can track them. I'm wondering if the scanner can hear them just by searching the 800 Mhz. band for which this particular system is.

I do a search in the 800 MHz. band to find new control channels and the scanner will automatically track a found control channel and decode the audio if it's P25 or C4fm. Also will stop on a system channel if there is audio on it and decode it's modulation. I wonder if some of these just might be an I-Call rather than a sytem channel.

Are the I-Calls for this type of particular system a completely different type of data stream or modulation vs. what is used on standerd coms with the digital P25 or C4fm modulation?

So one could hear the I-Calls but not track is what I'm asking for a Moto. type II digital system.

Go ahead and give me as much detail as you want I'm pretty technically inclined.

Thanks. :wink:

Note: When I hear encryption on a Moto. type II system it sounds just like garbled digital speech. Much like what it sounds like when you don't pick up a good signal or they are not inputing into the tower very well. The scanner will flash "ENC"
Boo!-Poltergeisty :-0

 

[BaLa]

Let us know what you find out. POST IT! Missouri has a lot of holes in the Database. I know I would use it since I have a lot of family in your neck of the woods.

I hope I didn't come across as an a$$. :lol:

I'm also still fairly new at scanning.
They usually talk through a repeater then? If so I was unaware of that.

If and when I find something out, I will either make a new thread or post in here.
I do plan on getting a second scanner which would make the process a 'bit' easier.

 

[Buckskinner33]

Dont worry about it...It was sort of branching out into another area that didnt cover your original question so I sorta feel you had every right to be.

Yes your system is on a repeter. I think that you just dont have all the freqs in place. This Board is set up by listeners that are constantly updating systems or repeaters they listen to. Most of the time the info submitted to RR is good and sometimes its not.

You get the original freqs from the FCC Database then the user or listener determins what is Transmit and recieve, how the county allocates the channels and somtimes TAGS it with a name: IE, 1A-PoDunk PD, 2B PoDunk Common, 3C PoDunk TAC. You get the picture?

Then those users or listener upload it to RR Database as a current, up to date and accurate information. It helps to have friends in your area doing the same thing, thats where this forum comes in handy.

Your system is pretty easy to figure out. Want to see a "Hair puller"? Go look at Michigans State wide TRS system. There, They are using a state wide digital trunk system and conventional freqs. The problem is now finding Talk groups and seeing if the counties are still using the old convetional freqs as backup untill everyone there get used to the system.It is the biggest system I have ever seen and is probly the way most states will be going to since Homeland Security was started.

I am suprised that Missouri has not done it yet. Theres a lot of Black Operation done by DOD and DOE in SW Mo. When the last time you passed by a un-tagged Semi truck and 3 un-tagged SUV?

Anyway, Im starting to get on my Art Bell wiered trip agian. I'll let you do the foot work and you can be the guy to let us know whats happening in your neck of the woods.

Have fun.

 

[BaLa]

I believe the frequency may be
154.95

and I think they are using Voice Inversion
not 100% sure.

I heard some traffic on that channel earlier this morning. And I couldn't understand it. I have heard some examples of voice inversion and it sounded similar to it.
Also there is not usually any traffic on that channel/frequency.

 

[kb2vxa]

Hi guys,

Let's take the logical approach, shall we? Start by monitoring the frequencies licensed to the particular agency, (ignore repeater inputs) you'll find them all on the FCC database if not here. Follow the posted suggestions to determine the type of transmission (modulation scheme, encryption, etc.) and take it from there.

If no such transmissions are found there is but one thing left, unlicensed low power on some "oddball" frequency in the same band. For example, one set of UHF systems used by several local police stations in NJ had interoperability by sharing repeater channel pairs and one "private" car to car channel. It was one they never expected that anyone in the area would bother with the NY City Sanitation Department repeateroutput channel. While a car to car channel may be simplex or simplex on a repeater output within the system it's hardly private so it's highly unlikely you'll hear them "go private" someplace you'll be looking for them.

BTW, sometimes they can be really dumb and actually think one of their simplex channels is private. I found one in a town I used to live in by looking at the license posted on the wall of an office as required by the FCC. They try to keep that out of the public eye, I happend to be there on police business and got lucky. That was before the days of the FCC on line database so I just mentioned that as a point of reference. Oh, a few times I heard some really gruesome details, one murder investigation was particularly graphic (UGH) and they thought no one else was listening.