New Jersey State Police Central System Frequencies

[Joseph11]

I'm listening to the NJSP Central System and noticed that two frequencies have the same exact thing on them. I am in Beachwood, NJ which is near Dover Twp. but I'm pretty sure this isn't an image or front-end overload because it happens on two scanners I own. 868.5125 MHz and 867.6625 MHz are the two frequencies. 867.6625 MHz is comming in with static but 868.5125 MHz is completly clear. I also noticed that sometimes the two frequencies don't open carriers at the same time, which is more proof this isn't an image or front-end overload. Anyone know why these two frequencies are multicasted?

 

[RocketNJ]

868.5125 is not a frequency in Troop C's system. What you might be hearing is a statewide patched talkgroup which will transmit on a channel on all 3 trunked systems.

868.5125 may be a channel on Troop B or Troop A system.

 

[Joseph11]

NEW JERSEY STATE POLICE
TROOP C (CENTRAL) TRUNKED RADIO SYSTEM
System C Frequencies
freq            chan    voice   control
860.7125        01      X       X
859.7125        02      X       X
858.7125        03      X       X
857.7125        04      X       X
856.7125        05      X
860.2125        06      X
859.2125        07      X
858.2125        08      X
857.2125        09      X
867.2125        10      X
867.6625        11      X
868.1375        12      X
868.5125        13      X
866.6125        14      X

868.5125 MHz is a frequency in the Troop C system.

It wasn't just one talkgroup, it was every talkgroup that transmitted on any of those two frequencies.

 

[RocketNJ]

No it is NOT a freq in Troop C. Troop C's trunked system is only 12 channels. The databases are wrong.

868.5125 and 866.6125 are not part of Troop C's trunked system.

 

[GM]

I have to dissent from this opinion. I looked up callsigns WNDD575 and WNZZ317 which both carry the debated frequencies of 866.6125 and 868.5125 and see that both are valid on the NJSP Troop C Trunking system, registered to two tower locations, one of which is Holmdel and the other Millstone Twp. The FCC database lists 14 frequencies (channels) in their line-up. I have also just seen both of these frequencies in use on the Troop C system. Maybe they are carried over to the Troop B system as well, I don't know. I do not claim to be an expert at all, but just wanted to clarify a misunderstanding in this matter as I have observed in my personal observations.

 

[Joseph11]

RocketNJ and GM, I am out of range of the Troop A and Troop B systems, so I know it's not coming from any of those.

GM brings up a good point. They have been used as part of the system and are licensed to the state in the same callsigns that the rest of the Troop C system sites are. Someone needs to run Trunker on the Troop C system and see if it assigns any talkgroups those two frequencies.

 

[RocketNJ]

There are 12 Quantar stations at the Troop B and Troop C sites on the new system configuration.

Question, do you still hear the Troop C calls on 868.5125 and 866.6125 today? If not then I know what you heard. I've been basing my answers on the new system configuration and not the old one.

The old SmartNet system allowed for some sites to have extra base stations for load capacity. The new system (went online late last night) does not. So, the new system only uses the first 12 frequencies listed below.

Edit - I checked your original post time from last night. You were hearing the old SmartNet system. The two freqs are no longer used for Troop C trunked system.

 

[Joseph11]

Actually, this never happened before last night. I noticed it this morning. Also, what post from last night are you talking about?

 

[RocketNJ]

duh, Your post was tonight at 7:13 pm. Stupid me

I'll have to check with some contacts to see what is going on. The conversations should not be on that freq though. Weird,

I agree the last two freqs are licensed for Millstone and Telegraph Hill but the new system only has 12 channels at each site.

 

[Joseph11]

OK. Since there's not much activity during the night, I'll check tommorow to see if they're still being used.

 

[GM]

I was basing my answers on the old configuration. I have noticed that the freq's that were previously used only on a seldom basis have been moved into the spotlight and used on a constant basis. I will also keep a track on the different freq's to see what's in use. They might have stopped using these channels, I'm not sure yet. I should have been more specific in my earlier post. Only time will tell. At least with the new configuration, I don't have to hear the sound at the end of the transmission (which sounds like coins going into a toll basket!).

 

[robbinsj2]

Over the past 12 hours, Trunker has turned up the following:

856.7125
857.2125
857.7125
858.2125
858.7125
859.2125
859.7125
860.2125
860.7125
867.2125
867.6625
868.1375

I last monitored this system over the weekend, so this time it turned up as a cell. Type now shows as II Astro NetWkd, with the same tone.

All the above data is new, none of it is carry-over. The last three Fx just turned up within the past few minutes, as I was writing this.

I'll keep Trunker running on this system for another 12 hours, will post if I log anything additional.

 

[Joseph11]

GM, I hated that sound too. Yesterday, I was still hearing the SpectraTAC beeps but now I'm either hearing nothing or the DigiTAC "soft click".

robbinsj2, I don't think the system is assigning any talkgroups those two frequencies anymore. It just appears to be a multicast of other frequencies in the system. I'm not sure of the use, in older Trunker logs did the system ever assign a talkgroup any of these two frequencies in question?

I'm still hearing trunked usage on those two frequencies, I just checked. It still appears to be a multicast, though.

 

[RocketNJ]

The 12 frequencies that Robbinsj2 listed match what I have for the new Troop C system. I still don't know where the other freqs are coming from.

I'm wondering if they added an Intellirepeater site someplace for fill-in coverage.

I am not able to hear Troop C from here. How does the new system sound?

 

[elias1988]

I am not able to hear Troop C from here. How does the new system sound?

It sounds loud and clear on my end.

 

[Joseph11]

I am not able to hear Troop C from here. How does the new system sound?

It sounds just like the old one, minus the SpectraTAC beep at the end of transmissions. There's less static on some talkgroups too.

 

[robbinsj2]

New system sounds great to me, just generally a lot more pleasant to scan IMHO. And I love that I'm seeing real radio IDs for Troop B users on system-wide talkgroups (HERN, trauma, MICU, aviation, etc.). Can't wait for more of the same with they upgrade South.

In the past half hour or so, I've noted the following talkgroups on 867.6625: C-3, 4, 5; D-2, 3; E-1, 2, 3; DOC 2A; data (27824); NorthSTAR. All of them also seem to rotate through the 85* frequencies.

From South Brunswick, I don't hear anything on 868.5125. Joseph11, are you still hearing stuff there? Any PL/DPL on it? Can you check for a subaudible TGID?

Trunker deleted the frequencies from my working b11esys.txt when it created and populated b11ec1.txt. I have an old backup of the sys file (http://www.jim-robbins.com/radio/trunker/Mot/B11ESYS.TXT) circa 5/30/05 or so, and it only shows the same 12. I don't routinely Trunker this system, though.

Jim

(edit: fixed URL)

 

[Joseph11]

OK. For a few minutes, I waited on those two frequencies. This is what I got:

868.5125 MHz:

NJNG DATA
C3-08 CMDPST
C3-26 HSPD
C3-14 NBKTP
C3-15 HMLPW
C6-11 BSRPW

866.6125 MHz:

C6-11 BSRPW
DOC2B
C6-13 NWKTP
C3-03 SOUTH
C3-04 WEST
C3-15 HMLPW

All via subaudible data, so it's not all correct. I saw it wobble from one ID to another when someone was talking, so I just logged the one that stayed on the display the longest. On another note, maybe these frequencies are just being used at the Dover Township site. It's odd that just one site would be using them, though.

 

[RocketNJ]

Unless there is an IR site up for fill in coverage. A limitation of simulcast SmartZone is you cannot have extra frequencies at just one of the simulcast sites.

 

[Joseph11]

Unless there is an IR site up for fill in coverage. A limitation of simulcast SmartZone is you cannot have extra frequencies at just one of the simulcast sites.

I guess it's an IntelliRepeater site, I'll check the licenses for extra frequencies.