DSD Plus question
- Thread starter bobruzzo
- Start date
boatbod
Member
LRRP is Location Request Response Protocol. Basically it's a means for the network to find the location of subscriber radios (GPS).
OK That makes sense but apparently either the subscriber or base station is having a problem getting a gps signal? Or maybe for some reason the agency I am listening to doesnt have the subscribers set up for gps yet? You can see both ID's for the 2 entities communicating but when I look at the LRRP map feature and zoom in to my area I dont see activity.
You wont see any activity until you see actual gps coordinates shown in purple. What's being shown in your pic is just IP addresses.
I'm guessing you meant DSD and not SDS so I changed the thread title. Also moved to the proper forum.
If you no longer want to see any of that:
Although this will also suppress registrations, affiliations, etc
Although this will also suppress registrations, affiliations, etc
If you're interested in the LRRP fixes you'll need to see the GPS co-ordinates within the line examples you posted. It will look similar to this;
Within DSD you can also open up LRRP.exe and it will show you the reported positions. Also some networks may have position reporting active but use separate platforms to show the locations of their fleet / assets. LRRP subsequently may not show those fixes. You can adjust Zoom of map and age of results from a minute to weeks or every result previously logged. (Within LRP.exe hit ? and an Active Keylist menu will show).
End result example:
Within DSD you can also open up LRRP.exe and it will show you the reported positions. Also some networks may have position reporting active but use separate platforms to show the locations of their fleet / assets. LRRP subsequently may not show those fixes. You can adjust Zoom of map and age of results from a minute to weeks or every result previously logged. (Within LRP.exe hit ? and an Active Keylist menu will show).
End result example:
On a Moto P25 system, you typically aren't going to see lat/long/direction/range information just by normal monitoring. You'll see messages like you are seeing there on your screen, but you won't see actual lat/long data. If available from that particular system, that information is usually transmitted by the mobiles on a voice channel input. And that means you'd have to be pretty darned close to the mobile unit to even hear it, and then it would have to be transmitting that info.
Just ignore what you see about the no Status/NoFix and move on to monitoring other things.
Mobby1-Kenobby
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Hi Bobruzzo
On some P25 networks those messages will use a proprietary protocol in conjunction with encryption making decoding those messages impossible.
I fully agree with mtindor's assessment/advice on this.
Cheers.
On some P25 networks those messages will use a proprietary protocol in conjunction with encryption making decoding those messages impossible.
I fully agree with mtindor's assessment/advice on this.
Cheers.
Very valid points re P25 systems and I should've mentioned that in the example I provided, my post generally applies to DMR / NXDN systems, not P25 such as the one being monitored by the OP, but at least he now knows what is needed should he ever decide to try LRRP on non P25 systems.
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