Tennessee FBI

[Floridarailfanning]

Also, don't rule out 162-174 for MIL Activity

Well, that might explain it. . .

171.6875 NAC 167
171.9875 NAC 167

TG 1 RID 3244271 AES

This traffic is being multicast on both frequencies.

I've only heard a small amount of traffic, some in the clear. neither of those are listed on the TN Federal page so I don't think it's TVA or NPS. I see elsewhere those two are listed as FBI but the FBI repeaters around here are on 167 and 170.

 

[Floridarailfanning]

There are short data bursts happening occasionally on all of these channels and they decode as P25 TDU packets with no source RID.

171.5625
171.6125 NAC 167
171.6875 NAC 167
171.7875 NAC 293 (NAC probably decoded wrong.)
171.9875 NAC 167
172.1875 NAC 167
172.2125 NAC 167

171.5875 has a CWID that runs every few minutes. I tried to decode it but CW Decoder kept just spitting out mostly nonsense though TEV260 did come through on a few tries. I have no idea if that is a valid ID for a fed/mil user.

Here is a recording of the ID

CWID_New.wav

The last voice call happened around 16:30 ish. Since then I have only seen data.

 

[INDY72]

Sounds like an linked VHF P25 repeater system. Also most likely its the TN FBI net. The data bursts you describe are the repeaters talking to each other, as well as information packets such as GPS location for the radios. That NAC of 167 is almost exclusively FBI. The 293 NAC is most likely another of the fed Alphabet Boys...

 

[Floridarailfanning]

Having looked at the FBI allocations in other places I agree that it's likely a linked system. It's just curious that it's such an expansive system. I've found 3 more frequencies to add to the 7 listed above.

170.6625 NAC 167
170.7250 NAC 167
170.8375 NAC 167

Unfortunately, I haven't heard any actual voice traffic in several hours now so I still can't confirm the user. If I find who it is for sure, I'll submit it to the DB.

I put all of the frequencies into my XTS2500 with a scan list so I can listen for the next couple of days.

 

[INDY72]

The FBI system is so expansive it will blow your mind. Each larger city has from 8 to 12 repeaters, those linked to repeaters across whole state. And multiple state nets linked in regional nets. These tied in in some places to the nation wide DOJ trs. It's also shared by other agencies.

 

[ecps92]

NAC + RID = FBI Knoxville Field Office - can you be more specific in your location vs "East TN"

Well, that might explain it. . .

171.6875 NAC 167
171.9875 NAC 167

TG 1 RID 3244271 AES

This traffic is being multicast on both frequencies.

I've only heard a small amount of traffic, some in the clear. neither of those are listed on the TN Federal page so I don't think it's TVA or NPS. I see elsewhere those two are listed as FBI but the FBI repeaters around here are on 167 and 170.

 

[ecps92]

How about KEV260 which does fall in the NTIA range, have not looked for it in any of the older books, but likely FBI [FL?]

There are short data bursts happening occasionally on all of these channels and they decode as P25 TDU packets with no source RID.

171.5625
171.6125 NAC 167
171.6875 NAC 167
171.7875 NAC 293 (NAC probably decoded wrong.)
171.9875 NAC 167
172.1875 NAC 167
172.2125 NAC 167

171.5875 has a CWID that runs every few minutes. I tried to decode it but CW Decoder kept just spitting out mostly nonsense though TEV260 did come through on a few tries. I have no idea if that is a valid ID for a fed/mil user.

Here is a recording of the ID

CWID_New.wav

The last voice call happened around 16:30 ish. Since then I have only seen data.

 

[Floridarailfanning]

NAC + RID = FBI Knoxville Field Office - can you be more specific in your location vs "East TN"

Knoxville field office would be correct. East TN for me = Blount County and Knoxville area.

How about KEV260 which does fall in the NTIA range, have not looked for it in any of the older books, but likely FBI [FL?]

I figured that KEV would make more sense than TEV but since it wouldn't decode right I wasn't sure. I looked up both KEV260 and WEV260 yesterday on ULS to ensure it wasn't commercial or public safety or an image of something else entirely.

 

[Floridarailfanning]

Hearing lots of activity now. It suddenly got very busy around 14:00. Most transmissions are running AES but I did hear a unit in the clear calling or responding to the State EOC.

Most common ID's seen.
RID 3244110 TG=1 ALG=AES KEY=20820
RID 3241172 TG=1 ALG=AES KEY=20820

 

[ChrisP]

How about KEV260 which does fall in the NTIA range, have not looked for it in any of the older books, but likely FBI [FL?]

Just FYI, I have KEV200 through KEV207 as the Birmingham, AL FBI Field Office. KEV280 is Jacksonville, FL.
I haven't found KEV260 in my NTIA records yet, but still looking...
- Chris

 

[Floridarailfanning]

Are the federal callsigns unique to a single frequency and location or can they be used for various frequencies/sites like commercial and public safety licenses?

If they are unique I can try to record more CWID's from the various repeaters I'm hearing.

 

[ecps92]

Yes for generally [YMMV] unique,. but I've found re-purposed equipment where someone never reprogrammed the CWID
This was a CT VA Paging Transmitter, now in NH at a VA, but still sending the CT Callsign.

Are the federal callsigns unique to a single frequency and location or can they be used for various frequencies/sites like commercial and public safety licenses?

If they are unique I can try to record more CWID's from the various repeaters I'm hearing.

 

[Floridarailfanning]

I've been monitoring for the last hour or so and I haven't heard any more CWID's except for the KEV260 again.

Here are some of the RID's from this morning.
1
3241172
3241181
3244004
3244217
3244245
3244228

Everybody is using AES-256 Key ID 20820. Nothing heard in the clear yet.

 

[ecps92]

Since this thread was about the TN ANGB at Tyson, may I suggest you ask the MODS to move the FBI / TVA
posts to their own thread vs interm-mingling them

I've been monitoring for the last hour or so and I haven't heard any more CWID's except for the KEV260 again.

Here are some of the RID's from this morning.
1
3241172
3241181
3244004
3244217
3244245
3244228

Everybody is using AES-256 Key ID 20820. Nothing heard in the clear yet.

 

[Floridarailfanning]

Since this thread was about the TN ANGB at Tyson, may I suggest you ask the MODS to move the FBI / TVA
posts to their own thread vs interm-mingling them

Yes, I had not intended to totally hijack the tread.

 

[ka4bni]

There are short data bursts happening occasionally on all of these channels and they decode as P25 TDU packets with no source RID.

171.5625
171.6125 NAC 167
171.6875 NAC 167
171.7875 NAC 293 (NAC probably decoded wrong.)
171.9875 NAC 167
172.1875 NAC 167
172.2125 NAC 167

171.5875 has a CWID that runs every few minutes. I tried to decode it but CW Decoder kept just spitting out mostly nonsense though TEV260 did come through on a few tries. I have no idea if that is a valid ID for a fed/mil user.

Here is a recording of the ID

CWID_New.wav

The last voice call happened around 16:30 ish. Since then I have only seen data.

The Call Sign is KEV260