Boston/State 700Mhz Overlay System

A forum for discussion of the many trunked radio systems in and around our listening area.
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ecps92
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#26 Post by ecps92 » 29 Jul 2017 09:56

Excactly -
All the TG's
All the time
and we get what we get on that Zone the radio is locked onto.
jbella wrote:Not sure if others do it the same way, but in my #36's the Mass P25 system, is 1 system. I just punch sites in and out, and keep the talk groups for Cambridge FD, Massport, Worcester FD etc always plugged in. If you can't get them, there's no harm.
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garys
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#27 Post by garys » 26 Sep 2017 13:52

Over the past few weeks a number of 31XX talk groups have popped up on the 700 Mhz overlay. All have been encrypted. From the few non encrypted groups in the 31xx block, they might be assigned to the City of Boston.
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jrm3607
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#28 Post by jrm3607 » 26 Sep 2017 18:27

garys wrote:Over the past few weeks a number of 31XX talk groups have popped up on the 700 Mhz overlay. All have been encrypted. From the few non encrypted groups in the 31xx block, they might be assigned to the City of Boston.
Talkgroups 3107-3175 I have listed as possibly being Boston PD Channel 1 - 35, based on a few talk groups in that range popping up on occasion with BPD traffic many moons ago when Boston first switched to the state system.

Also 3192-3200 are Boston Fire's encrypted station alerting talkgroups, I know they are in the RR database I don't know if they ever got added to the wiki here.

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garys
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#29 Post by garys » 27 Sep 2017 13:06

The range I've seen so far is from 3101-3127, which puts them in the BPD group. I don't think it's part of their P25 transition. It might be similar to BFD that has some P25 encrypted TGs that are not used for normal operations. Detectives, Administration, things like that. At least I hope so.
jrm3607 wrote:Talkgroups 3107-3175 I have listed as possibly being Boston PD Channel 1 - 35, based on a few talk groups in that range popping up on occasion with BPD traffic many moons ago when Boston first switched to the state system.

Also 3192-3200 are Boston Fire's encrypted station alerting talkgroups, I know they are in the RR database I don't know if they ever got added to the wiki here.
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ecps92
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#30 Post by ecps92 » 30 Sep 2017 09:43

3101 and 3103 should be BFD
Fire-Alarm/Cable and Field Services
garys wrote:The range I've seen so far is from 3101-3127, which puts them in the BPD group. I don't think it's part of their P25 transition. It might be similar to BFD that has some P25 encrypted TGs that are not used for normal operations. Detectives, Administration, things like that. At least I hope so.
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#31 Post by garys » 01 Oct 2017 17:46

That makes sense from the TGs that I do know about. It's odd (to me) what they choose to encrypt.
ecps92 wrote:3101 and 3103 should be BFD
Fire-Alarm/Cable and Field Services
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garys
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#32 Post by garys » 08 Nov 2017 16:28

3139 and 3141, which I have as Areawide 3 and Areawide 4 respectively, have been encrypted for the past few days. I don't know if those numbers have been reassigned to other users or what else might be going on. I don't see why they would be encrypted on one trunk system, but not on the others and not one the UHF analog channels.

Has anyone else heard it?
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#33 Post by ecps92 » 09 Nov 2017 06:59

Interesting, altho ...those are [according to my notes] in the Boston PD Range, maybe Boston PD re-allocated them or [dare I use the ENC word].....

See what 3149 shows [Bapern Central] or 3147 during an ALL CALL
garys wrote:3139 and 3141, which I have as Areawide 3 and Areawide 4 respectively, have been encrypted for the past few days. I don't know if those numbers have been reassigned to other users or what else might be going on. I don't see why they would be encrypted on one trunk system, but not on the others and not one the UHF analog channels.

Has anyone else heard it?
Bill Dunn N1KUG
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http://scanmaritime.com

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#34 Post by garys » 09 Nov 2017 08:05

The Wiki here show them as Areawide 3 & Areawide 4, which is why I have them in the scanner. We'll have to see what develops.
ecps92 wrote:Interesting, altho ...those are [according to my notes] in the Boston PD Range, maybe Boston PD re-allocated them or [dare I use the ENC word].....

See what 3149 shows [Bapern Central] or 3147 during an ALL CALL
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#35 Post by ecps92 » 09 Nov 2017 10:46

Correct for Bapern 3 and 4 - but in the Boston Allocations of TG's
Just as Cambridge has 1113 for AW3 and 2529 for MSP AW3
garys wrote:The Wiki here show them as Areawide 3 & Areawide 4, which is why I have them in the scanner. We'll have to see what develops.
Bill Dunn N1KUG
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"The tougher it is to find a frequency, the more it makes me want to work to find it. - I've learned to use the SEARCH Button"

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#36 Post by garys » 09 Nov 2017 12:01

Which is still weird. As I understand the TG "map", there are not supposed to be duplicate TG numbers used across any of the systems that access the Comm. of MA Astro Core. That was part of the consolidation of the old City of Boston trunk and Zone 1. That's why only a couple of years after transitioning from the Type I system to the Type II system, Boston had to reprogram all of their trunk radios.

So, 3139 should only be used for AW3, even if it's only used by Boston units on the 700Mhz system.

I think that's how it works.

Still, it wouldn't seem to make sense to encrypt those channels on one system when they are not encrypted on UHF.

Weird.
ecps92 wrote:Correct for Bapern 3 and 4 - but in the Boston Allocations of TG's
Just as Cambridge has 1113 for AW3 and 2529 for MSP AW3
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#37 Post by ecps92 » 09 Nov 2017 12:16

maybe / maybe not for it "was supposed to be" but there are more than just BAPERN duplicated
1057 / 3091 = Metro Fire "RED"
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jrm3607
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#38 Post by jrm3607 » 09 Nov 2017 13:22

garys wrote:Which is still weird. As I understand the TG "map", there are not supposed to be duplicate TG numbers used across any of the systems that access the Comm. of MA Astro Core. That was part of the consolidation of the old City of Boston trunk and Zone 1. That's why only a couple of years after transitioning from the Type I system to the Type II system, Boston had to reprogram all of their trunk radios.

So, 3139 should only be used for AW3, even if it's only used by Boston units on the 700Mhz system.

I think that's how it works.

Still, it wouldn't seem to make sense to encrypt those channels on one system when they are not encrypted on UHF.

Weird.
The BAPERN patches as of the past few months have only been on the 25xx talkgroups even on the Boston and Cambridge sites, and since then I haven't heard anything on the 31xx or 11xx patches, so I would assume that the talkgroup has been reassigned. Also since then I have heard P25 TDMA encryption on talkgroups 3111, 3121, 3125, 3131, 3137 all of which I'm assuming but not sure is Boston PD.

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#39 Post by garys » 09 Nov 2017 14:05

I think we've previously discussed those and I thought that they were in the Boston FD range of TGs. A lot of 700 trunk only TGs for BFD are encrypted.

With the APX7000 (I think that's the model) being dual band, it's completely feasible that both agencies are adding TGs on the 700 system for secure communications.
jrm3607 wrote:The BAPERN patches as of the past few months have only been on the 25xx talkgroups even on the Boston and Cambridge sites, and since then I haven't heard anything on the 31xx or 11xx patches, so I would assume that the talkgroup has been reassigned. Also since then I have heard P25 TDMA encryption on talkgroups 3111, 3121, 3125, 3131, 3137 all of which I'm assuming but not sure is Boston PD.
We're peace loving people, we're not hunting trouble, but if trouble should find us, we'll stand up and fight.

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