[Allstar Digital] All-star to Dstar and back

[Toussaint OTTAVI]

Hi,

Le 14/03/2017 à 03:25, Steve Zingman a écrit :
> As of today there is a limited solution that only runs on the x86. 
> I'll let someone else who knows it better describe it. The way I think 
> it should be done is like how we did DMRGateway. Use the USRP channel 
> driver in ASL.Modify DummyRepeater to output PCM instead of analog 
> audio and to accept PCM rather then analog audio. connect that to the 
> USRP channel driver. That way you can use ircDDBGateway and all the 
> other modern D-Star tools. Yes, you will still need the DV3000.

I had similar needs, and I made some tests. Here are my results :
- The only working solution I found would be to use some old (and 
partially closed-source) software from Scott, KI4LKF : chan_dstar 
(open-source) and dextra_cli (source not available). This software needs 
an old AMBE2000 chip. It can not work with recent AMBE3000 chips (such 
as the ones found in ThumbDV and PiDV, for ex.), because the data 
exchange protocol with the chip has changed.
- There's no out-ot-the-box solution using  recent AMBE chip and modern 
open-source software (AMBEServer, idcDDBGateway, etc...)

Then, the ideal solution would be to develop the required software :
- Modifying DummyRepeater as described is one option, but it requires 
skills in C programming
- As far as the "repeater" function is not needed, and ircDDBGateway is 
not strictly required, another option would be to develop an independant 
gateway with three UDP connections:
     - Taking UDP audio flow from Asterisk / USRP channel driver
     - Connecting to an existing reflector, using any protocol (DCS, 
XRF, or better : XLX)
     - Connecting to AMBEServer software

Anyway, I have no skills (and no fun !) in C programming. And I am too 
busy to start such a project for now.

Maybe an analog audio loopback will do the job easily...

73 de TK1BI