Los Angeles Countywide Integrated Radio System (CWIRS) Trunking System, Various, California
Los Angeles Countywide Integrated Radio System (CWIRS) Trunking System Profile
www.radioreference.com
California Radio Interoperable System (CRIS)
- Thread starter mcjones2013
- Start date
CWIRS is an LA County (county-wide) trunked system.
Radio checks on CRIS TG 1301. On the CWIRS side, it looked like they were borrowing a P&R tac…
KG7PBS
Member
ok thanks i was thinking it was still called LARIC Still
LA-RICS is a separate system and is being built out for first responders primarily.
CWIRS is a much older system largely for the non-emergency county support departments.
Logged a few transmissions this afternoon (Tuesday). TG 1301 mostly Mt Lukens and a few from Oat Mtn.
Heard the CWRS references today, users seemed to be mainly in the Santa Clarita Valley from locations given. And several asked if they were heard on "the Harris radio".
I received info from a reliable source today that Site 28 is Hauser Peak, not Frazier Mountain. Is there any objection to me changing it?
mkewman
Member
I thought it was weird too. It might've been in the shadow of the school or something since I was down at the lower pool?
- Joined
- Nov 19, 2008
- Messages
- 1,595
Looks like CHP is on CRIS now and some talkgroups are Encrypted.
[QUOTE="tsalmrsystemtech, post: 3712661, member: 1380233"
Looks like CHP is on CRIS now and some talkgroups are Encrypted.
[/QUOTE]
Sir,
would you expand on your message as to "WHERE" your location is and "What" you are hearing?
Looks like CHP is on CRIS now and some talkgroups are Encrypted.
[/QUOTE]
Sir,
would you expand on your message as to "WHERE" your location is and "What" you are hearing?
- Joined
- Nov 19, 2008
- Messages
- 1,595
| 859 | 35b | D | CHP BLUE 2 | CHP Blue 2 - Base | Law Dispatch |
| 860 | 35c | TE | CHP BLUE 2 | CHP Blue 2 - Mobile | Law Dispatch |
| 861 | 35d | D | CHP GOLD 3 | CHP Gold 3 - Base | Law Dispatch |
| 862 | 35e | TE | CHP GOLD 3 | CHP Gold 3 - Mobile | Law Dispatch |
| 863 | 35f | D | CHP BLACK 3 | CHP Black 3 - Base | Law Dispatch |
| 864 | 360 | TE | CHP BLACK 3 | CHP Black 3 - Mobile | Law Dispatch |
| 865 | 361 | D | CHP GREEN 3 | CHP Green 3 - Base | Law Dispatch |
| 866 | 362 | TE | CHP GREEN 3 | CHP Green 3 - Mobile | Law Dispatch |
| 867 | 363 | D | CHP WHITE 3 | CHP White 3 - Base | Law Dispatch |
| 868 | 364 | TE | CHP WHITE 3 | CHP White 3 - Mobile | Law Dispatch |
| 869 | 365 | D | CHP BROWN 3 | CHP Brown 3 - Base | Law Dispatch |
| 870 | 366 | TE | CHP BROWN 3 | CHP Brown 3 - Mobile | Law Dispatch |
Rev: 2.0.6620
Whay down south, Border CHP patrol. Thanks. Maybe Central Vally will be next to go live?
- Joined
- Mar 22, 2018
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I noticed these updates too, and some key questions come to mind:
- Why would CHP run clear FDMA on the base TGs but encrypted TDMA for Mobile TGs?
- How does the information supplier know the identity of encrypted TGs
- Why would the CHP employ the base/mobile structure on a trunking network?
The above is for CHP Valley Division in the Sacramento region.
yes, my bad
ScannerDude244
Member
Hmmm are the mobiles coming out clear on the base? Or you just hear the dispatcher?
KG7PBS
Member
OK let’s dive into this. From what it appears the dispatch channel which is the base channel will be FDMA clear. I suspect the dispatch channels remain active and in the clear for outside agencies to monitor not everyone will have an APX.
In conclusion the mobile channel which is TDMA and encrypted with AES-256 this would allow CHP to be in compliance with the DOJ mandate about confidential Personal information.
I personally think CHP is going to keep the original set up so officers won’t have a hard time adjusting to the new system by totally Redesigning it. K.I.S.S.
In conclusion the mobile channel which is TDMA and encrypted with AES-256 this would allow CHP to be in compliance with the DOJ mandate about confidential Personal information.
I personally think CHP is going to keep the original set up so officers won’t have a hard time adjusting to the new system by totally Redesigning it. K.I.S.S.
Looks like they've just patched these from all the low-band channels for the Valley Division, which makes sense as being where Com Div HQ is located, right? BLU2 is the division tac. BLK3, GRN3, and GLD3 are all the Sacto Center dispatch channels. WHT3 is Stockton Center. BRN3 is Chico Center. The only missing one is Chico Center's GRY2; any bets on it being 871 and 872?
ScannerDude244
Member
Are they even on the air yet?
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- Nov 16, 2004
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- 2,083
From my understanding the entire system is (was) supposed to be fully TDMA voice.
Just my personal thoughts, they will have one "primary" 'channel' in the clear and a second "tac" 'channel' encrypted to pass PII.
From what I have been told, the Kenwood radios are already setup with the base/mobile frequencies as a single 'channel' (RX on base frequency/TX on mobile frequency), they also have different alpha tags with a separate 'channel' for each area office, even if more than one area office is on the same frequency.
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