When we did the DMR to AllStar testing, we used the NW Digital Radio DV3000. It was mounted on a RPi2 running asterisk. The DV3000 uses AMBE-3000 vocoder chip from DVSI. We tested with Mototrbo and D-Star. Did not have a Fusion or P25 radios. 73, Steve N4IRS On 10/29/2015 8:03 AM, David McGough wrote:
Guys,
I haven't looked carefully as to which variants of AMBE are in use by D-STAR, Fusion, etc...Doesn't the original AMBE patent expire fairly soon?
The reason I'm asking is that I know there are some fledgling open-source AMBE implementations out there. A couple years ago I hacked CODEC2 into Asterisk for experimentation, thinking about directly linking to HF via the FreeDV project--and, not wanting to transcode from one low-bandwidth CODEC to another, making truly awful audio!
After playing with it a few weeks, I didn't do much more...(I've still got that code and it still works, if anyone wants to play with it?)
...Just wondering.
73, David KB4FXC
On Thu, 29 Oct 2015, Matthew Pitts wrote:
Mike,
You are correct in the statement that the DV4mini needs additional hardware to handle the transcoding from a digital radio. Once I get my nodes back up on my Raspberry Pi, I will work on an updated version of the D-STAR channel driver that supports DMR and Fusion AMBE encoding and decoding as well as radio control functionality for the DV4mini. Matthew Pitts N8OHU
On October 28, 2015 6:18:34 PM EDT, Mike Zingman <mike.zingman@gmail.com> wrote:
Actually the DV4Mini alone does not help tie Allstar into Wires-X. In order to do that one must:
1) Have an interface to the YSF network protocol 2) Decode and extract the AMBE frames from the streamed protocol 3) Transcode the frames to PCM at the proper sample rate using the DVSI AMBE3000 chipset 4) Send those frames to something like the already created USRP channel driver
In reverse, 4, 3, 2, 1 to send data back to the YSF network. In addition to the simple outline above, you would want to a) Add audio filtering/shaping to make the AMBE audio more acceptable to what we are used to on Allstar (one of the single greatest aspects of Allstar is the audio quality) b) Transfer of as much metadata between the networks as possible
The DV4Mini is a radio module + digital modulator (DStar/DMR/YSF). It has no AMBE encode/decode hardware so there is no way to transcode the audio content. For that a "ThumbDV" or a DV3000 would be the hardware of choice. The DV4Mini could be used as a user radio on an existing RF network, but one would still need the AMBE3K to do the transcode.
Mike
On Wed, Oct 28, 2015 at 5:48 PM, Neil k8it <k8it@cac.net> wrote:
I have been waiting a bit before I start playing with DIAL on a RPI2. I still have two questions 1. Does the RPI2 DIAL version solve the tx echo buffer issue that the current version of Asterisk RPI2 code has. The fix to this issue seems to be taking a long time. 2. Some users have reorted that a lot of modules have been disabled, such as the Echolink channel driver and others. 3. With the new Mini-DV4 dongle $125 and the amount of capability, has anybody wrote a channel driver to tie the Yaesu Fusion Wires-X network into DIAL. It appears that most of the documentation is out there, we just need someone to write the channel driver
Thanks 73 Neil Sablatzky K8IT Allstar Node 41838 KITLINK Allstar Node 42087 KITLINK HUB IRLP Node exp0068 Echolink K8IT-L WIRES-X K8IT 11479 Room 21479
*From:* Steve N4IRS <szingman@msgstor.com> *Sent:* Tuesday, October 27, 2015 10:35 AM *To:* N7MTC . <n7mtc@outlook.com> ; app_rpt-users@ohnosec.org *Subject:* Re: [App_rpt-users] Procedure for loading DIAL on a R-Pi2 or a PC
Mac, The RPi2 install is pretty much download the image, burn it to SD card,. Once the Pi boots, you can login on the HDMI / USB console, or SSH into the board on port 222. The board is setup for DHCP so check your DHCP (router) server for address. If you want, you can login via the built in serial port at 115,200 System will walk you through setup.
FAQ for DIAL is at: <http://docs.allstarlink.org/drupal/node/170> <http://docs.allstarlink.org/drupal/node/170%3E>
73, Steve N4IRS
On 10/27/2015 10:20 AM, N7MTC . wrote:
Is there a procedure for loading the "new" DIAL version of asterisk for Raspberry pi2?
I am looking to connect either a Pi2 or an intel NUC to a Yaesu Dr-1x using the Arcom RC-210 and the Arcom ADR. I noticed DIAL has replaced ACID as the latest flavor of asterisk for both PC and PI2. I have not found any install write-ups or YouTubes showing a DIAL install.
Regardless of which platform I will need to use an USB to Serial adapter to connect the ALLSTAR node to the repeater controller. It will be of the FTDI chipset either a trendnet Tu-s9 or a GearMo USB RS-232.
/73
Mac, N7MTC
Benjamin Franklin - "Those who surrender freedom for security will not have, nor do they deserve, either one."
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