Site Question

[K0MSM]

Yesterday, while trying out my new SDS100 on a road trip, I noticed that it was picking up traffic from ISP on the new Greene County ISICS site at Seven Hills Park. I picked up the traffic while I was in Boone County, close to Ogden. Traditionally, I've been getting my ISP traffic from the Boone County "Ames/Woodward Simulcast" system, because the Seven Hills Site seemed to be still in development. So naturally, I was excited to see some traffic on it!

When I go home, I turned off Boone County on my 200 to see if I would start picking up traffic from Seven Hills. After a couple of hours of monitoring... nothing. Lots of hits, as normal, on Greene County's conventional system, but nothing at all on the ISICS system. Turned Boone County back on, and bingo - ISP comes back from the Ames/Woodward site. So...

Could it be that they were just testing the Seven Hills site for a little while yesterday? Or, is there possibly some other reason that I'm overlooking for this behavior?

Sean

 

[kslager]

Yesterday, while trying out my new SDS100 on a road trip, I noticed that it was picking up traffic from ISP on the new Greene County ISICS site at Seven Hills Park. I picked up the traffic while I was in Boone County, close to Ogden. Traditionally, I've been getting my ISP traffic from the Boone County "Ames/Woodward Simulcast" system, because the Seven Hills Site seemed to be still in development. So naturally, I was excited to see some traffic on it!

When I go home, I turned off Boone County on my 200 to see if I would start picking up traffic from Seven Hills. After a couple of hours of monitoring... nothing. Lots of hits, as normal, on Greene County's conventional system, but nothing at all on the ISICS system. Turned Boone County back on, and bingo - ISP comes back from the Ames/Woodward site. So...

Could it be that they were just testing the Seven Hills site for a little while yesterday? Or, is there possibly some other reason that I'm overlooking for this behavior?

Sean

The way I understand things, some talk group's are setup to not transmit on the tower if there there's no provisioned radio connected to the tower.

For example, if there is a car accident in Greene County, and Life Flight goes en route, you won't hear it. But as Life Flight nears, their radio might switch to the Greene County tower and you will then here them reporting on the ground and airborne again. As they get closer to Des Moines, their radio would most likely switch back to a tower there, and your Life Flight traffic goes away again.

 

[BinaryMode]

Site affiliations.

Here in Northern CO I sometimes hear traffic from the Denver area because someone is affiliating with a tower here and the tower allows the affiliation. Some towers do not allow the affiliation. It's all dependent on how the repeater is programed.

You have to think of a P25 trunked system like a cellphone system. You "affiliate" with the nearby cell site as you move and get handed over to the next site.

Also note, like cell sites, all the towers are connected via copper, fiber or microwave link...

Edit-

There's an Ogden, Utah, too.

Edit 2-

Looks like there a at least 12 Ogden's.

 

[thatoneiowan]

I went to school in the Iowa Ogden that's why I can't do math

op what talkgroups were hitting on the new site, law 3b or whatever district? radio testing? how do we know it was DPS? what kind of traffic were you hearing, sounds like it was routine? maybe set it up during whenever they do shift change and see if the 10-41s come thru

 

[K0MSM]

Ogden, Iowa.

The traffic was from ISP Districts 3 & 4. They must have been running some tests, because I've heard nothing on that site since except for some local traffic (possibly Jefferson PD) in the wee early morning hours a couple of days ago. I hadn't yet enabled recording on my SDS200 so I don't know what it was. But I fixed that now.

I suspect they're still doing some tests on the site.

I keep my SDS100 running at my desk, and only on the Greene County site, so if there's anything else that comes up, it'll catch my attention.

Sean