DSDPlus DSDPlus Fastlane single-dongle monitoring No audio

[slicerwizard]

Ok. Finally added

wav: audio_385081250Hz_17-41-29_22-08-2021.wav

Interesting control channel. I doubt that any P25 decoder will properly handle it. You should make a much longer recording that covers time periods when voice calls are being made. Use Start Source Audio Recording As in the DSD+ Input menu and let it run for half an hour.

 

[jocam29594]

Is this the p25 system? I would suggest trying this and seeing if you can hear person audio afterwards - https://prnt.sc/1qelo9f


Yes as a last solution it'll work. I do think you have an issue decoding the system which would be the problem for that noise you keep hearing.

CC-DSDPlus-Raw-Input_2021-08-24@075540

I uploaded about 4. min and today there is nothing changing.

 

[jocam29594]

Interesting control channel. I doubt that any P25 decoder will properly handle it. You should make a much longer recording that covers time periods when voice calls are being made. Use Start Source Audio Recording As in the DSD+ Input menu and let it run for half an hour.

CC-DSDPlus-Raw-Input_2021-08-24@075540

Visit this link to play the audio

files.fm

 

[noamlivne]

If it is a Phase1 system, which I think it is, you can also try Unitrunker http://www.unitrunker.com/download/. (I use the "old" version from 2017. There is an ongoing development of a new version but I cannot manage with it).
You can create two VCOs with one dongle: one would be a Signal role VCO and one would be a Voice role VCO.

Regardless, if it is a Phase1 system, also DSDPlus can listen to the talk channel. When you see that a talk channel is active, go to it and see what you can hear there. Of course this is not a good method to hunt for talk channels manually, but perhaps it would give you an idea what is going on there.

 

[slicerwizard]

You're dealing with a P25 system made by Aselsan Inc; it's not broadcasting all of the usual system/site identification messages. That's probably causing your issues.

WACN ID is 7D290

SysID is 001

RFSS / Site ID might be 6A.6A


Voice channels: 385.48125 386.28125 386.73125


Voice encryption might be in use. Try monitoring the voice channels. Tune FMP24 to a voice channel and enable squelch (press Q in FMP24) - then record in DSD+. The recording will be small - only active signals will be recorded (no static / dead air). Selecting Only Record During Sync in the DSD+ Input menu should also eliminate any dead air from the recording.

 

[jocam29594]

First of all, thank you very much. Unitrunker made me crazy.. fastlane is really very useful. IM keep going to achieve…


@sliYes, you are right, there is no information about the trunk system frequencies etc. . on any website and no one shares, so we are having trouble with the finding source.

Today first time heard uncoded voice. But maybe 5 seconds And then gone.. Unfortunalety there is no you mentioned voice channels.. moreover, I heard on sdrtrunk. So fastlane doesn’t help again.

As you see attched photo, tried op25 . Ofcourse I dont hear anything but give me some information. I dont know how I can use these numbers or codes..

If it is not private, I want to ask you. If I want to learn the information you wrote, especially wacn, Please could you check attached photo And maybe you can differ informations. In my picture wacn is unknown.