IWN National Capital Region System Changes

[maus92]

Site 001-090 is indeed Rockville. It is using the old IWIN control channel for the Rockville site, but 2 new traffic channels. No channel Grants. Site Neighbors are:

 

[BM82557]

P25 Link Level Encryption

One of well known security flaws (if you'll call it that) is the ability to monitor talkgroup/user IDs even on encrypted systems. As the article quoted states, Link Level Encryption is in the works. (http://www.project25.org/images/stories/ptig/P25_Standards_Updates/TR8_2016_summary_6.09.16.pdf)...

forums.radioreference.com

 

[freqhopping]

Here's what likely Paris Mt is doing right now. First is direct input which sounds different than it should, second is in control channel 'on' search mode where it does not display sysid and site like it should.

IWN Paris Mt

I W N Paris Mt 170.9125

rumble.com

170.3875 is currently doing the same.

 

[maus92]

P25 Link Level Encryption

One of well known security flaws (if you'll call it that) is the ability to monitor talkgroup/user IDs even on encrypted systems. As the article quoted states, Link Level Encryption is in the works. (http://www.project25.org/images/stories/ptig/P25_Standards_Updates/TR8_2016_summary_6.09.16.pdf)...

forums.radioreference.com

No official standard yet - at least as far as deployment goes.

 

[maus92]

Here's what likely Paris Mt is doing right now. First is direct input which sounds different than it should, second is in control channel 'on' search mode where it does not display sysid and site like it should.

IWN Paris Mt

I W N Paris Mt 170.9125

rumble.com

Perhaps it is not in its final configuration.

 

[freqhopping]

169.575 has a similar sort of signal going on too with an occasional change to a normal CC sound.

And now it stopped completely.

Same situation on 168.4875.

 

[maus92]

I'm seeing site 001-098 as being both "Upper Marlboro" (dlw) and "Tysons / Falls Church" (fh) in this thread. Do we have a consensus yet?

Second part is when do we start submitting the site conversions from IWIN to JIWN networks?

 

[dlwtrunked]

I should have listed, I know everyone's neighbors except concerning 1.95:
1.83-1.86, 1.87
1.84-1.87, 1.89, 1.92, 1.94, 1.97, 1.98
1.85-1.88, 1.89, 1.92, 1.96
1.86-1.83, 1.87, 1.90, 1.91, 1.98
1.87-1.83, 1.84, 1.86, 1.91, 1.97, 1.98
1.88-1.85, 1.89, 1.961.90, 1.90
1.89-1.84, 1.92, 1.85, 1.88, 1.98
1.90-1.86, 1.88, 1.91, 1.93, 1.98
1.91-1.86, 1.87, 1.90, 1.91, 1.93
1.92-1.84, 1.85, 1.89, 1.94
1.93-1.90, 1.91
1.94-1.84, 1.92, 1.97, 1.99
1.95-?
1.96-1.85, 1.88
1.97-1.84, 1.87, 1.91, 1.94, 1.99
1.98-1.84, 1.86, 1.87, 1.88, 1.89, 1.90,
1.99-1.91, 1.94, 1.97

 

[ScanWI]

No official standard yet - at least as far as deployment goes.

P25 Link Level Encryption is a standard and has been deployed on systems. However it does not at this time encrypt the control channel. In these cases it provides an encrypted key that the radio must send before the system allows it to register/affiliate on the system. This helps reduce radio ID spoofing and other radio hackery.

 

[maus92]

P25 Link Level Encryption is a standard and has been deployed on systems. However it does not at this time encrypt the control channel. In these cases it provides an encrypted key that the radio must send before the system allows it to register/affiliate on the system. This helps reduce radio ID spoofing and other radio hackery.

What systems currently use LLE? The brand new systems around here - and there are *a lot* - did not deploy it.

 

[BM82557]

I should have listed, I know everyone's neighbors except concerning 1.95:
1.83-1.86, 1.87
1.84-1.87, 1.89, 1.92, 1.94, 1.97, 1.98
1.85-1.88, 1.89, 1.92, 1.96
1.86-1.83, 1.87, 1.90, 1.91, 1.98
1.87-1.83, 1.84, 1.86, 1.91, 1.97, 1.98
1.88-1.85, 1.89, 1.961.90, 1.90
1.89-1.84, 1.92, 1.85, 1.88, 1.98
1.90-1.86, 1.88, 1.91, 1.93, 1.98
1.91-1.86, 1.87, 1.90, 1.91, 1.93
1.92-1.84, 1.85, 1.89, 1.94
1.93-1.90, 1.91
1.94-1.84, 1.92, 1.97, 1.99
1.95-?
1.96-1.85, 1.88
1.97-1.84, 1.87, 1.91, 1.94, 1.99
1.98-1.84, 1.86, 1.87, 1.88, 1.89, 1.90,
1.99-1.91, 1.94, 1.97

1.95 is still not listing site neighbors, just sysid site and nac

 

[maus92]

I saw no evidence of an active site in Upper Marlboro today, on any Fed VHF freq 160-174 MHz. The cch for site 1.98 was weak in Suitland, but not evident in Upper Marlboro. It registered as APCO, but could no be decoded.

Site 001-099 showed neighbor / peers sites:
1.91 Greenbelt
1.93 Jessup
1.94
1.97 Suitland

There *seemed* to be coverage testing in PG using 172.3875, and *possibly* 170.375 (weak in Rosaryville.).

Site 001-97 decoded with peers:
1.83
1.84
1.87
1.91
1.94
1.99

 

[BM82557]

FYI --
1.95 is still not listing site neighbors, just sysid site and nac

 

[dlwtrunked]

I saw no evidence of an active site in Upper Marlboro today, on any Fed VHF freq 160-174 MHz. The cch for site 1.98 was weak in Suitland, but not evident in Upper Marlboro. It registered as APCO, but could no be decoded.

Site 001-099 showed neighbor / peers sites:
1.91 Greenbelt
1.93 Jessup
1.94
1.97 Suitland

There *seemed* to be coverage testing in PG using 172.3875, and *possibly* 170.375 (weak in Rosaryville.).

Site 001-97 decoded with peers:
1.83
1.84
1.87
1.91
1.94
1.99

I found the problem. sorry about that, in my notes the site numbers were out of order (and wrote arrows indicating that) but when I posted, I did not look at the site number (and blindly ignored my arrows pointing out the mi-ordering) and went by the order. Here is corrected
Site. Sub-site
1.84 Alexandria (Telegraph Dr.)
1.85 Bull Run Mtn.
1.86 Bladensburg
1.87 Crystal City
1.89 Fair Lakes (Fairfax)
1.90 Rockville
1.91 Greenbelt
1.92 Independent Hill
1.93 Jessup
1.94 Spring Hill (La Plata)
1.97 Suitland-Silver Hill
1.98 Falls Church (7799 Leesburg Pike)
1.99 Upper Marlboro (Clagget Rd.), MD

In the case of neighbors, I had seen these changing. In fact, I was surprised that I did not see 1.93 and 1.99 as neighbors and that you did is more what I expected. Note also, I seen one weird typo repeatedly in one of the transmitted neighbors list (a wrong frequency) but I forget which one--I put the right one in my earlier list.

 

[dlwtrunked]

POST DELETED

 

[maus92]

If UT2 is decoding a weak signal, it can produce some errors. If some data looks suspicious, I generally delete it and wait for it to be repopulated.

I'll recheck Upper Marlboro. I was checking reception using SDR# while driving through "downtown" and at the McDonald's.

 

[dlwtrunked]

If UT2 is decoding a weak signal, it can produce some errors. If some data looks suspicious, I generally delete it and wait for it to be repopulated.

I'll recheck Upper Marlboro. I was checking reception using SDR# while driving through "downtown" and at the McDonald's.

I do the same thing--Unitrunker will often mis-associated a neighbor when one has changed frequencies. See my remark about Upper Marlboro above (about me having 1.98 and 1.99 interchanged earlier). You can only see the tower if you drive down Clagget Rd. (east off 301) till it narrows and curves left. Tower will be on your left side.

 

[BM82557]

1.95 is still not listing site neighbors, just sysid site and nac

 

[dlwtrunked]

I saw that also.

 

[BM82557]

Here is what 1.88 is currently showing --