I'm also receiving Kent and Sussex voice channels showing Strange Talkgroup ID's. I didn't pay much attention to the posts about the NAC 3A7h before because I always remember this being system wide NAC. I do not remember showing talkgroup ID's before. The P25 system will pass data on the voice channel like tgid and priority tg info; as they build the system the legacy system wouldn't know any differn't that more info is now there its just passing voice like it always did before. I've read somewhere that there has been a p25 core for some time now maybe as they build we will see more info on these voice channels. Thats a nice find guys I bet those will be the new TGIDs for the new system.
State of Delaware - P25 Phase 1 System (2024)
- Thread starter trailhiker73
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I'm taking a guess here. I think the system is being laid now virtually now, maybe this process is common with an upgrade of a type 2 system with p25 core but no one has noticed info on the traffic channels before on the months prior to switchover. In theory they can lay out talk groups, patches and all that good stuff work out any bugs now before effecting any users get that right out of the way. We keep hearing rumors of system going live in august time line. Perhaps that's when we will see a control channel pop up. Next we know Del Dot has a lot of old radios and i think i heard they will be first on the new system. Maybe their new radios will be held and not given out until they have been programmed on the new system not the old. Again this is a guess with all the information you all brought here.
When experimenting yesterday, I noticed that a tech was testing radio installations on DTC talk groups, doing test counts and testing the "covert mike" as he put it. Not sure what a covert mike actually is, and why a transit vehicle would need one.
I saw an unmarked tinted out DTC Vehicle while doing contract work over the winter, we thought he was inspecting or following us but we saw the guy get out at a gas station with Dart Jacket. I'm still wondering what that guy was. Looked like a Wilmington Police car.
Similar observations on the NCC systems. Scanning conventional shows the potential P2 TG's.
I programmed the NCC system Conv. into a SDS200 and monitored on Unitrunker. Found some good TG patterns. When the system controller (TG 65520) interjects as a source to a active TG, the TG is incorrect on the conventional monitored channel's TG decode, It seems to be a rolling list of random TG ID's like 199,241,133, 389,169.1005
My eyes hurt...
My eyes hurt...
It appears if you download the .csv of the system and make TG 1616=TG101 and TG1648=TG103 and just copy that down the list of known TG's, that is the pattern. Check my math.
There are of course TG gaps here and there in the database which will throw this off (unless you add a dummy TG to fill out the +32 cadence) like TG 7216 and 9264. I believe there are no gaps in TG's up thru 30616 then the 32208-34320 range get's a bit spotty in my logs.
There are of course TG gaps here and there in the database which will throw this off (unless you add a dummy TG to fill out the +32 cadence) like TG 7216 and 9264. I believe there are no gaps in TG's up thru 30616 then the 32208-34320 range get's a bit spotty in my logs.
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Perhaps the old tgids are being automatically mapped rather than deliberate tgid assignments?
Regarding TG 65520, I think that might be a rotating patch test. Just a thought as it hangs on for a a fair # of handovers then goes silent.
d119
Patch & Channels Clear...
It's quite common for transit vehicles to have covert microphones. Generally they have hidden emergency buttons that when activated, will cause an emergency alarm to be transmitted to the dispatch center, along with (generally) 30 seconds of "open mic" from a covert microphone hidden somewhere in the drivers compartment.
This allows the dispatch center to listen in to the activity on the vehicle to try and get an understanding of what is happening without the driver saying anything. There (generally) is no indication inside the vehicle that the emergency alarm was activated, some vehicles will change the external header signs to "EMERGENCY CALL 911".
I did some research and found this to be of interest to you guys. There are a handful of 700 mhz frequencies. Try these for some control channels and see what happens.
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Adding in my two cents- SOD is not allowing any new units onto the state system that don't have the TDMA operation in their flashcode. Furthermore, SOD is going around to all users and flashing APX units to have TDMA as well as add all assets into APX CPS RM for Codeplug management. A lot of the test calls you are hearing is most likely units being updated from XTL to APX. Everything I've seen with TMC/DelDot is consistent with them having APX units now and no longer XTL/XTS. However they do have some XTL O5 heads that look similar to the old XTL5000 heads. It is also correct that TMC/DelDot will be the first users on the system. Work has been done recently and continues to be done on getting sites upgraded with RF equipment.
Same control channels as the old system??
Likely not, or perhaps might use an alternate as the two systems will run in parallel for a while as the agencies onboard.
It seems to me then around the end of July or beginning of aug it would be time to build a new codeplug for sussex county. Do we know for sure if it will be a Harris system or malfunction moto?
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Motorola
Mr_Boh
Member
SmartZone is via SmartX as called out on their websites. They have had the ASTRO 25 core, but attached to the SmartZone simulcast sites. Explainer from another system on RadioReference database (Suffolk NY):
You could see if the math lines up.
Other option are to provision new talkgroups and either patch them (could get expensive or resource intensive if a lot) or just provision new talkgroups, and have hard cut date(s) where you get users like fire/ems to have a day/time to start using new ones while monitoring the old ones to remind users to swtich.
Still no evidence of a new control channel for Sussex as of today. I do see an undocumented traffic channel showing "Continue" several times an hour at 857.1875 and the target tg is always 18086 which appears to be a system resource. "Continue" is Unitrunker-speak that means a device is logged onto the network, basically saying "I'm here."
Headed down in a month for my yearly beach trip Jeep Week/airshow weekend. Doesn’t sound like any changes will be up and running by then? I always monitor the UHF/VHF for Delaware along with the Motorola system anyway. But I guess I won’t need to adjust any programming from last Summer yet?
