Iowa Statewide Interoperability Communication System (ISICS)
thatoneiowan
Member
Yes they are the DPS Law talk groups Iowa Statewide Interoperable Communications System (ISICS) Trunking System, Statewide, Multi-State - Scanner Frequencies (radioreference.com)
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I would say they have their own as they did ask for access to use Clinton TG's. Just needed to add ISICS to their own radios for Starcom21 as Whiteside County Sheriff just went there lately.
MCWKen
Member
Recently, I have been hearing a lot of traffic on TG 4002, of course it is listed as encrypted.
Yet the other day, I noted two Motorola Tech's conversing, one side encrypted, the other open. I was lead to believe that if one radio on an encrypted TG was open, than both sides of the conversation would be open. Perhaps someone with a bit more understanding can set me straight.
BTW, TG 4002 was only showing up on the Clinton 'tower' and not Muscatine or DeWitt.
Yet the other day, I noted two Motorola Tech's conversing, one side encrypted, the other open. I was lead to believe that if one radio on an encrypted TG was open, than both sides of the conversation would be open. Perhaps someone with a bit more understanding can set me straight.
BTW, TG 4002 was only showing up on the Clinton 'tower' and not Muscatine or DeWitt.
Depends.
It depends upon how the talkgroup is set up in the system. On the system level, a talkgroup can be allowed to be clear only, encrypted only, or both.
Additionally, it depends upon how the radio/personality is programmed in the subscribers. Encryption can be selectable via a switch on radio. Or set to strapped (Clear or secure) and not allow user to change.
WB0VHB
Member
Bumping one of my old threads to see if anyone else is seeing this traffic? It's encrypted but I'm just curious who the user is since there is a very large number of radio IDs? The TG or radio IDs aren't listed in the RR database.
On the Beaverdale (Burlington) tower, I see a large amount of traffic on TG 9123 with a very large number of radio IDs in the 30600 to 30800 range. There must be dozens and dozens of different radios IDs using this TG.
Not sure if this is a statewide TG with maybe just 1 or 2 radios registered on the Beaverdale tower pulling the traffic to it?
This TG has the second largest number of hits compared to TG 5304 for DPS traffic.
On the Beaverdale (Burlington) tower, I see a large amount of traffic on TG 9123 with a very large number of radio IDs in the 30600 to 30800 range. There must be dozens and dozens of different radios IDs using this TG.
Not sure if this is a statewide TG with maybe just 1 or 2 radios registered on the Beaverdale tower pulling the traffic to it?
This TG has the second largest number of hits compared to TG 5304 for DPS traffic.
It's fairly common in the P25 world to have two "channels" set up in the radio for the same talkgroup, albeit one clear and one encrypted. The "Clear" channel can be set up to still decode any encrypted traffic it receives (assuming the proper key is loaded in the radio), but transmissions are always "strapped" clear.
For example, a PD might have only one dispatch talkgroup, but in the subscriber radios make channel position 1 clear and channel position 2 encrypted, but either selection will receive and decode encrypted traffic, but only channel 2 will transmit encrypted. That way an officer calling for help on the encrypted channel will always be heard by other officers, regardless of which channel they are on. This is done in both trunking and P25 conventional systems. Or say, if dispatch wants to send encrypted traffic to an officer, they can do so, even if the officer currently is on "channel 1".
Seen on Muscatine/Scott sites
MCWKen
Member
I am a slow learner. I am set up now with the Muscatine tower at home, and actually got logging to work in OP25. And indeed, I did see the traffic on TG 4002. Thanks for pointing that out for me.
west-pac
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200 RIDs (30600-30800) is not a 'very large number', by any means. That could be a 'county fire Disp' TG. It's not uncommon for ONE volunteer fire dept to have 40-50 radios....30 fire fighters, 10 apparatus, 1 or 2 base radios, and a few spares, per dept. Depending on the number of fire depts in a county, you could see hundreds of RIDs on one TG, belonging to different agencies or depts.
Another possibility could be a city or county 'Law Disp' TG. It's a good possibility that each officer has a handheld radio and a vehicle-mounted radio; 2 radios per law enforcement officer, plus dispatch console radio IDs, plus spare radios for each dept, plus misc LE vehicles (prisoner transport van, armored SWAT vehicles, coroner transport, etc..).
200 RIDs could easily be one dept on one TG, or several depts on one TG.
An easy way to find Disp console IDs, and fire dept TGs and RIDs is to listen to the VHF/UHF fire dispatch/paging frequency for a call, then see if any TGs/RIDs become active afterwards. A week or so of listening and you'll be able to see which TGs and RIDs become active depending on which fire dept gets paged.
thatoneiowan
Member
I think he was asking because that range doesn't fit the radio id scheme that most local does follow. Usually a county number and then 5 trailing. Warren county would be 91xxxxx for example. I'd think it's unusually high given that. The tgid also doesn't fit in for county allocation. While not impossible (Westcom stands out as an example), it is atypical. I have not seen that tgid or radio id range in central Iowa so I'm not much help on that.
west-pac
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This probably won't help any, but this is how the Indiana statewide system is:
In Indiana we have the same RID scheme you mentioned. Indiana has 92 counties, so 1xxxxx thru 92xxxxx would be county-issued RIDs. RIDs 93xxxxx-98xxxxx are state agencies, and RIDs 99xxxxx are federal agencies. 5-digit RIDs are wired Dispatch console IDs, so 92105 would be a Whitley county (92) dispatch console, 9102 would be a Cass county (9) dispatch console.
In Indiana I'm sure RIDs are (county number)(then start at 10000), but I like to break it down to (county number)(10)(xxx), such as 9210534 (92)(10)(534). Counties with more than 1,000 radios will then go to (92)(11)(xxx)... then (92)(12)(xxx).
I hope some of that made sense, and you may be able to apply that to the RIDs you're seeing in Iowa. Certainly there will be a pattern, you just have to find it.
MCWKen
Member
TG 9123 is not listed in Iowa, however in Illinois, that TG is used in District 7 along the Iowa border and lists as encrypted. Why you are 'hearing' it on Beaverdale is another matter. Just offering the possibility.
west-pac
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It looks like Beaverdale covers almost all of Henderson county, IL. According to the RRDB the two counties share some public safety services. Also, Henderson county does not have an IL StarComm site in their county, so maybe the Beverdale site covers both counties and both systems (IA and IL).
Indiana and Michigan share sites on both sides of the state lines. You can see that in their Neighbor Lists.
MCWKen
Member
I noticed there was a network of towers for IL in Muscatine, at least 4 of them.
west-pac
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It looks like those 4 sites are owned by the county, and were allowed to connect to the IL Starcom system. There is an IA ISICS site in the county as well.
The sites are owned by Motorola and are part of the Starcom21 system. The Muscatine Co 911 Director said they were going with Starcom at the time as a replacement as their DMR equipment needed replacing and ISICS was not really yet. They would move later to ISICS. When they will is unknown. Their radios have both systems (SC21/ISICS) as I see rids for muscatine showing up on ISICS at times on my unitrunker program.
WB0VHB
Member
Well here is another interesting characteristic of TG 9123. It appears to be mostly active only Monday thru Friday during the business hours. I can remotely log into my OP25 computer from work during the day and see lots of activity. But when I get home late afternoon, no more activity.
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