IowaCity — Anyone hear anything from ICCSD's NXDN system?

[sempai]

hello,

i upgraded my scanner and got an sds100 kitted out, and i love it. it arrived the day after the last day of school, but i expected to hear something going on, i am less than half a mile from one of the schools my kids go to, but its like the only school absent from the talkgroup IDs in the RRDB!

so i am wondering if i should start trying to discover anything that might not be documented already but i also was curious if anyone has been hearing any traffic out of that nxdn 4800 baud (it's gotta be bps right??) system with the ICCSD school district schools and busses for every single other school not wood elementary 😂🤦‍♂

 

[Bandit52241]

You will need to upgrade your 100 to the nexgen upgrade, $75. But with school being out I doubt there is much to be heard but maybe a new driver being train.

 

[sempai]

You will need to upgrade your 100 to the nexgen upgrade, $75. But with school being out I doubt there is much to be heard but maybe a new driver being train.

i did, i have all the upgrades including waterfall! i did actually hear an ICCSD bus today on NXDN so i can happily report that i have successfully heard NXDN in Iowa City!

 

[Bandit52241]

thats good

 

[chris451rr]

hello,

i upgraded my scanner and got an sds100 kitted out, and i love it. it arrived the day after the last day of school, but i expected to hear something going on, i am less than half a mile from one of the schools my kids go to, but its like the only school absent from the talkgroup IDs in the RRDB!

so i am wondering if i should start trying to discover anything that might not be documented already but i also was curious if anyone has been hearing any traffic out of that nxdn 4800 baud (it's gotta be bps right??) system with the ICCSD school district schools and busses for every single other school not wood elementary 😂🤦‍♂

Summer recess wait til september......

 

[sempai]

place is hoppin with nxdn now. i think my 9yo's school is misidentified so i am waiting to recognize someone or something on tg 15 because i think it might be Grant Wood since it doesn't appear otherwise

 

[sempai]

i'm proud to say i've contributed to the RR database due to some schools being renamed as they shuffled 6th grade around into what were formerly jr. high schools and are now middle schools.

i live in shouting distance of my 9yo's school and when i'm on campus everyone's radios are actively used but i barely hear anything from them and i can't figure out why. i have set most of the schools to perm Avoid to limit to my kids' schools and the busses, as well because from like 7am to 9am and 2pm to 4pm it's non-stop from over a dozen different talk groups so i thought maybe i was missing traffic due to all the other schools and went on an Avoid Spree.

in case i did something weird in my own favorite list i have grabbed a fresh favorite list of this NXDN 4800 system and that one seems to be acting the same. i had the LCN finder running for half an hour and apparently that's intended to run for a long time so i'll set it up before bed and let it roll into tomorrow morning and see if i discover anything else. my other scanner is a pro668 with the whistler DMR upgrade and it doesn't understand NXDN. i have a HackRF and some RTL-SDR modules but i haven't investigated what i'd need to do for capturing and decoding NXDN with any other options. since the SDS100 has some discovery capabilities i figured i'd start there.

anyone else listening to this system and picking up TG15 regularly? when the scanner hits those lists it stays on RAN 1 the whole time, after thumbing through some FAQs and documentation i am curious if setting one of them to RAN 0 would be a better way to validate we've got a complete system map in the RRDB?

both of these favorites lists have the same 4 frequencies, LCN, and RAN/Area data. one has ID Search enabled, the other one does not.
i have been keeping it handheld around the house this week but i can hook it up to an external antenna as well, my 9yo can ping me from a 5w GMRS-Pro at the school so considering i'm really interested in why i don't hear much of anything from her building i haven't thought a bigger antenna would solve any problems considering i can hear people at schools across town without difficulty. next time i'm in the office i might ask if i can get a look at one of their radios. maybe they're also piloting some other system or something, but i'd expect to hear bus coordination chatter to that school and i'm not hearing much of anything. i have to go review recordings again but i had like 4 brief TG15 transmissions out of 1000 captured since school started?!

thanks for any suggestions.

 

[sempai]

i did pick up the 4th LCN overnight but it didn't seem to be different from what it already had. i will probably casually cruise the front office staff next week when i take the 9yo to an appointment. i will run my usual ICCSD-focused favorites lists and enable Close Call Priority a bit today and see if that turns up anything unexpected.

edit: clarity

 

[sempai]

i was in the office today picking up a feverish 9yo and the handheld in the office was blowing up and i rarely hear that TG and i am a stone's throw from the building 🤔 there was only one person juggling the joint at the time so i didn't ask to check out their radio 😂

 

[sempai]

i have duplicated the ICCSD NXDN system as it exists in RRDB and run one in ID Search and the other in straight Scan. probably not optimal but this time of day all i care about is school and gmrs.

 

[sempai]

Today I picked up a TGID of `i8` marked `(SRC) i259` still on RAN 1 and it was about a bathroom but no clues to what school it was in or if it was another business on that same NXDN 4800 system that has ICCSD and a couple of other business radio users like a towing company that is busy on game days.

 

[sempai]

I asked the front desk and the name of someone on that TGID of i8 was asking for someone that is apparently facilities at Lincoln High, but i wasn't expecting talk group IDs in that format at all. still trying to figure it out and see if there's anything else going on that is causing me to miss what's happening on TG15.

 

[ISW376]

ixxx is a private call where users can select a user on the system and they can talk without disturbing other users.

SRC means Source and is the source radio initiating the private call.

DST means destination and that is the radio that the is receiving the private call.

More then likely it was a custodian talking to a iccsd maintenance supervisor or another custodial staff.

 

[sempai]

trunk discovery is still running, i'll let it roll until 2pm when elementary is dismissed on Thursdays. thank you for the tip on the private call, I knew that was a thing but it was the first time I had seen it with my own eyes @ISW376 !

 

[sempai]

FYI the front desk at Wood had a big row of new Kenwood HTs and they're going to be distributed soon so i'm paying close attention to this NXDN system this week and will report back any DB changes i can identify but i'm hoping that the reason i can't hear half of what goes on there is because of something these new HTs will address or something.

one of the other customers on that system works laaaaaaaate i heard someone talking at like 2am last night on a non-ICCSD talkgroup. i have my SDS100 and ProScan glued to GMRS/Ham and ICCSD traffic.

if i need to hear troopers sniping speeders the whistler is in my living room >< those guys are shameless sometimes.

 

[timsheff]

FYI the front desk at Wood had a big row of new Kenwood HTs and they're going to be distributed soon so i'm paying close attention to this NXDN system this week and will report back any DB changes i can identify but i'm hoping that the reason i can't hear half of what goes on there is because of something these new HTs will address or something.

one of the other customers on that system works laaaaaaaate i heard someone talking at like 2am last night on a non-ICCSD talkgroup. i have my SDS100 and ProScan glued to GMRS/Ham and ICCSD traffic.

if i need to hear troopers sniping speeders the whistler is in my living room >< those guys are shameless sometimes.

This is what I have for that system other than ICCSD.

TGID	NAME
81	ICBRSS UNK 81
84	BUSINESS 84
101	TAXI BUSINESS
146	READY MIX
161	TOWING
41675	ICBRSS UNK 41675
136	TREC SP CNTR

 

[sempai]

There are some new customers on that system I think, I'll be back in Iowa City tonight but I hopped into my radio workstation and I don't know what is happening but I definitely should be seeing a lot more of tg:15. My scanner (SDS100) is set to ignore many of the TGs that are schools I don't have children in, and I've used discovery scanning, and anything else I can think of and I do hear some p2p calls but when I'm in the building those radios are being used constantly and over the last few months I've only captured 30 transmissions on TG:15.

I almost wonder if Wood is using the TG the DB has mapped to Alexander Elementary, in the afternoon some of the voices I hear on TG:57 sound familiar and I only spend time at Wood/City and SEMS, I will find some samples and play them for my 9yo to see if maybe there's an attribution issue or something. I have logged *thousands* of TG:57 transmissions. Wood is 0.25mi away, Alexander is down the road so I'm not surprised I'd get them but the discrepancy is huge.

I am still using two instances of the ICCSD system one with Search one with Scan.

 

[ISW376]

The radio system is repeated so you can hear any user anywhere in the county assuming your with in range of the repeater... So it doesn't matter how far from the school you are because they are all using the same site.

 

[sempai]

i suspected as much, i looked up licenses when i was using Discovery which makes it even weirder that an entire school building is nearly silent if we solely rely on attribution for tg:15 to identify it.

and it feels like it's bad etiquette to outright ask. i wouldn't tell a weirdo like me if they asked what talk groups my radio uses 😂 i know they were provisioned with new kenwood HTs last month and most don't have keypads anyway so i reckon most faculty probably doesn't know what a talk group is.

this wednesday i will queue up some captures for my 9yo and 12yo. i had one a few weeks ago i flagged cuz i heard "need assist on Wood playground" and usually they don't specify the facility when they're talking to each other.

i get a fair bit of p2p calling at PLANT which i assume is the facility i picked up a replacement chromebook once.

 

[timsheff]

How active is this TG:15??? I listened with DSDPlus for a couple of hours this afternoon and did not see it at all....

EDIT:::: I looked through the DSD logs and this is what it shows from back in September:

TG: 15 "[GrantWood Elem] Grant Wood Elementary"


This comes from DSDPlus decoding the aliases....