Radio IDs and patches

[Robbyboy]

Hello All -

I tried to make the subject descriptive but was drawing a blank. Here is what I am looking at and maybe someone can decypher my scrawlings into something logical .

I am monitoring the Onslow County NC TRS system. They use extensive patches because of simulcasting since they have users on both.

(Im providing background here to try to gather information that I need)

Our Sheriffs office primary is on VHF but simulcast to TRS. I have ID'd the Sheriff Console RID. When I have the TG paused so I only monitor sheriff, I do not get the patch whatsoever. Is this something with the radio or the user :lol:?

If you need more info, please let me know!

Regards

 

[davidbond21]

So what your saying is you monitor a trunked system, that has a talkgroup dedicated to simulcasting a sheriff's conventional VHF frequency on that trunking system? Is that right?

What exactly is the problem, if you're trying to listen to the sheriff's simulcasted primary channel on the trunked system by sitting your scanner on the talkgroup assigned to it, you don't hear any traffic? Or you don't hear any traffic when that sheriff talkgroup gets patched to other talkgroups, and your scanner is sitting on it? The latter option I can explain.

From what I've seen, you can pretty much ignore the RID for the dispatcher's console on that talkgroup. If it's VHF conventional hooked up to a trunked system, the RID is going to be some temp ID given to whatever comes across talkgroup, because it has to have something there. That ID is assigned by the trunking system, it's not coming from the sheriff's radios or console.

 

[Robbyboy]

So what your saying is you monitor a trunked system, that has a talkgroup dedicated to simulcasting a sheriff's conventional VHF frequency on that trunking system? Is that right?

What exactly is the problem, if you're trying to listen to the sheriff's simulcasted primary channel on the trunked system by sitting your scanner on the talkgroup assigned to it, you don't hear any traffic? Or you don't hear any traffic when that sheriff talkgroup gets patched to other talkgroups, and your scanner is sitting on it? The latter option I can explain.

From what I've seen, you can pretty much ignore the RID for the dispatcher's console on that talkgroup. If it's VHF conventional hooked up to a trunked system, the RID is going to be some temp ID given to whatever comes across talkgroup, because it has to have something there. That ID is assigned by the trunking system, it's not coming from the sheriff's radios or console.

The primary means of communication on this system is VHF. One municipality has gone to TRS and as a result, the Sheriff Office has a TG that simulcasts.
When the console and municipality transmits, I get RIDs no problem. When VHF users transmit I do not get any RID no matter what. Is that normal to not get a RID from VHF users hitting the link (or whatever its called)?

Thanks

 

[davidbond21]

Yeah, that's what I've noticed with various EDACS systems around my area. Whenever there is a conventional frequency patched into a trunked system, on the trunking system you will see no RIDs from this, or if you do, it will be one ID that is consistent/unchanging. This is likely the ID given to the transceiver(or whatever device exactly is used) used for the simulcasting on the TRS.

 

[ILMRadioMan]

The primary means of communication on this system is VHF. One municipality has gone to TRS and as a result, the Sheriff Office has a TG that simulcasts.
When the console and municipality transmits, I get RIDs no problem. When VHF users transmit I do not get any RID no matter what. Is that normal to not get a RID from VHF users hitting the link (or whatever its called)?

Thanks

I think it depends on how it is patched.

I know the system you are speaking about (as I am in the same area). However, I am unsure how the patch happens. If it is a direct patch through a BIM in the CEB, then this is possiblly due to how the CDM does the patching through the CEB.

However, if they are using some outside equipment (I.E. ACU-1000, etc..) then it should have an ID.

 

[DaveIN]

Interesting. While you monitor the talkgroup maybe you should use UniTrunker to sniff out the activity at the same time.