Centrunk (CTRS) Project 25 VDOC System

[MTS2000des]

I for one, think it is great that you are advancing the art of radio communication, versus buying a Boaturd and kerchunking some garbage pail analog repeater that sounds like a bag of smashed buttholes, talking about mindless drivel. You're LEGALLY experimenting with P25 trunking, LEARNING about how the nuts and bolts of how ISW/OSWs pass in and out of your infrastructure, subscriber, how a network core is constructed- and you're doing it with part 97. I am sure you're having a blast despite putting in countless hours trying to figure all this out on your own without the benefit of expensive vendor led training.

That should be celebrated not shunned. You're not walking around malls with COP SOUNDS (tm) blaring with some cloned ID on someone else' system, you're doing it right. I have yet to see you doing funeral escorts either.

I commend and support your efforts, experimentation in amateur radio, and staying off our government radio systems in the process (one day that may change though, you may be the guy who takes my job.)

Respectfully,

N4NXD,

Radio Systems Specialist Senior and czar of 5B2_BEE00
Fulton County Emergency Services

 

[Echo4Thirty]

VoC certainly gets past the Part 97 hurdle of how to CWID the control channel.

 

[KevinC]

VoC certainly gets past the Part 97 hurdle of how to CWID the control channel.

You can do that in the datastream now, so no interruption of data for the CWID.

 

[GTR8000]

You can do that in the datastream now, so no interruption of data for the CWID.

True, but is digital BSI an acceptable means of transmitting a call sign on Part 97 amateur frequencies as it is with Part 90 frequencies?

 

[KevinC]

True, but is digital BSI an acceptable means of transmitting a call sign on Part 97 amateur frequencies as it is with Part 90 frequencies?

Stop with all the technicalities.

 

[GTR8000]

Okay then.

 

[carcarjg]

True, but is digital BSI an acceptable means of transmitting a call sign on Part 97 amateur frequencies as it is with Part 90 frequencies?

Soooo, I got into a long rant about this elsewhere, P25 Data is an Authorised Data Emission, and ADEs are a valid P97 Ident..... HOWEVER, the one crux with using P25T on P97 is the rule about operators having control of the frequency they are using. This means that anything more than VOC is a violation. You also have the "Callsign on first TX" thing, but the RPT wake in DMR violates that as well so eh.

I suspect that's why the Sites reported by the CC I found on 451.8 are all Part 90 freqs. I'll have to get my SDR out and send a pic when I get home

 

[Echo4Thirty]

That also makes me wonder if one persons experimental site is on Part 90 frequencies and someone elses is on Part 97, how is that legal?

 

[KevinC]

That also makes me wonder if one persons experimental site is on Part 90 frequencies and someone elses is on Part 97, how is that legal?

Legal schmegal...

 

[GTR8000]

Darn technicalities again!

 

[Echo4Thirty]

I am going to make an ISSI for my MMDVM and attach it to TxWARN as a roamer!

 

[KevinC]

I am going to make an ISSI for my MMDVM and attach it to TxWARN as a roamer!

Be sure to use CKR 3333.

 

[carcarjg]

That also makes me wonder if one person's experimental site is on Part 90 frequencies and someone elses is on Part 97, how is that legal?

Don't know if this is what they actually use, But this is what's reported on their discord.

 

[carcarjg]

I am going to make an ISSI for my MMDVM and attach it to TxWARN as a roamer!

This is the way. Throw it on MARCS for the memes

 

[Echo4Thirty]

Be sure to use CKR 3333.

I was thinking 3013.

 

[wa8pyr]

VDOC is not exactly a new concept.

Yep, GE and their descendants used it on EDACS, and various manufacturers use it on P25 (at least, it's available for P25).

 

[wa8pyr]

True, but is digital BSI an acceptable means of transmitting a call sign on Part 97 amateur frequencies as it is with Part 90 frequencies?

Probably not....

 

[carcarjg]

Yep, GE and their descendants used it on EDACS, and various manufacturers use it on P25 (at least, it's available for P25).

I swear there was a Moto version for Type 2

 

[GTR8000]

I swear there was a Moto version for Type 2

Correct, it was used most often with IntelliRepeater fill-in sites. The control channel would act as a traffic channel when necessary. MSI decided not to carry that feature forward to ASTRO 25 systems.

 

[box23]

You also have the "Callsign on first TX" thing, but the RPT wake in DMR violates that as well so eh.

Are you saying a callsign has to be given on the first transmission? Where is that listed in Part 97?