Re: ASL to XLX in DSTAR mode ?

Ken KE2N

Hi Santu,


The point of my posting was to say that you can run the transcoder on a separate PC (and that you should use hardware for DSTAR).


My setup is probably not what you want.  The ASL link is to a DMR talk group:

Asterisk <-> chan_USRP <-> Analog_Bridge <-> MMDVM_Bridge <-> DMR TG

I have used the emulator with this, but right now I am running it with a ThumbDV.  That dongle is plugged directly into the DVSwitch PC.


The remotely-accessed AMBED setup is for another system that links DSTAR to C4FM. 

That one uses the XLX reflector to connect to C4FM by means of an Open Spot which translates DMRmmdvm to C4FM (RF) at the Fusion repeater location.

The XLX reflector runs in the Cloud and accesses any required transcoding from a Raspberry Pi running AMBED and with a 6 channel fob from NW Digital.

Two AMBE channels are required for my link, leaving 4 channels for up to 2 additional links by other users.

DV Switch is not used at all for that link.





From: [] On Behalf Of Santu OTTAVI (TK1BI)
Sent: Monday, January 14, 2019 3:10 PM
Subject: Re: [DVSwitch] ASL to XLX in DSTAR mode ?


Hi Ken,

Le 13/01/2019 à 17:59, Ken KE2N via Groups.Io a écrit :

We do that for XLX725, for example - it seems to be pretty reliable, at least with the services we use....    

Are you using the following setup for linking ASL with XLX using D-Star ?

Asterisk <-> chan_USRP <-> Analog_Bridge <-> MMDVM_Bridge <-> ircddbgatewayd <-> XLX

Tht's what I'm trying to do, with hardware AMBE encoder (AMBEServer on rPi with a ThumbDV), but it seems I'm still missing something :

When talking in D-Star on XLX, I can see on MMDVM_Bridge :

M: 2019-01-14 19:48:02.113 D-Star, received network header from TK1BI   /X755 to CQCQCQ   via XRF755 K
D: 2019-01-14 19:48:02.716 D-Star, lost audio for 300ms filling in, elapsed: 603ms, expected: 30, received: 0
D: 2019-01-14 19:48:03.023 D-Star, lost audio for 300ms filling in, elapsed: 910ms, expected: 45, received: 28
D: 2019-01-14 19:48:03.324 D-Star, lost audio for 300ms filling in, elapsed: 1211ms, expected: 60, received: 43
M: 2019-01-14 19:48:03.616 D-Star, network watchdog has expired, 1.2 seconds,  98% packet loss, BER: 0.0%

And when talking on the analog side, lots of

D: 2019-01-14 19:55:21.379 D-Star Network Data Sent
D: 2019-01-14 19:55:21.379 0000:  44 53 52 50 21 18 70 01 00 0E 46 12 2B 23 06 7C    *DSRP!.p...F.+#.|*
D: 2019-01-14 19:55:21.379 0010:  60 F8 16 29 F5  

but no voice at all, and gateway callsign not heard on the XLX side.

In both cases, ircddbgateway does not seem to be much verbose. I didn't manage to get anything in the log after that :

M: 2019-01-14 20:02:06: DCS link to DCS755 K established
M: 2019-01-14 20:02:06: Starting the Callsign Server thread

As most of the setups seem to be using DMR, and as my XLX has AMBE transcoding, I may have a try in DMR mode (with DMRGateway instead of ircddbgateway). But before doing that, I'd like to know if the D-Star setup described above works.

Thank you in advance. 73 de TK1BI

Join to automatically receive all group messages.