KI4LKF's D-Star Software D-Star Open Source / Dextra project by Scott Lawson, KI4LKF His D-Star work spawned from his of 2007 and at some point in 2013 he discontinued his work and was no longer answering emails. While Scott may be gone from the development scene, fortunately a lot of his software has been archived and mirrored. His code has also been the base for several forked projects, that are derived from his initial work. The D-Star implementations of his project moved around many times. He coded the first Open D-Star G2 gateway + repeater. As well as first open source GMSK node adapter repeater / hotspot software. D-Star G2 Gwy and DSTAR rptr with GMSK RF: register a DSTAR rptr, DSTAR routing, link to Reflectors, DSTAR local RF/GMSK, TRUST server updates. Panasonic kx a141exm manual software.
It runs as a D STAR G2 Gwy/Rptr not like a fake like Dplus hotspot. His original rpt_dir project ran into opposition first from Robin Cutshaw, AA4RC as that is how it tied in to D-Star. Robin's Dplus protocol wasn't documented, but Scott figured it out. That feud fueled Scott to write Dextra, an open replacement for Dplus. But since dextra was still the underdog, he later he tried to link it at the G2 gateway level. Same basic issue, the trust server guys and him didn't play well together.
Barco mxrt 5450 driver download windows 10. Feb 16, 2019 - DVSI includes Windows based PC software so that users can install the. USB Device is a low cost alternative to a vocoder software implementation. Their patented IMBE™, AMBE® AMBE+™ and AMBE+2™ Voice.
So he wrote an open G2, and when he exposed how flawed that was, some German guys came up with ircddb. There was no way to tie a home brew D-star repeater into any network until his work came about. His work likely inspired Jonathan, G4KLX who started developing GPL'ed D-Star software in January 2009 and actually worked with Scott for a short time. Going back to the non D-Star side of things with rptdir, Scott showed IRLP, Echolink and Allstar could all play together.
I think the only group open minded enough to work with Scott's idea was the Allstar/app_rpt guys. Code was added to Allstar in 2008 with (David Cameron, VE7LTD's permission) to link all three. Scott's rptdir was the proof of concept. And in 2007 the ARRL released an that likely helped encourage these groups to work together. In 2012 David Cameron requested support and functionality for IRLP connectivity be officially dropped from the app_rpt/Allstar project. There were 'cease and desist' notices that Dave Cameron was sending, saying IRLP was a trademark.
Ironically trademark/patent/copyright searches in the USA and Canada show nothing. Some Background: While the D-STAR specification does use a proprietary vocoder (AMBE), the actual specification (for on air) is (though you need to be able to read Japanese for the ), as developed by the Japanese Amateur Radio League (JARL). All of the non-air protocol callsign routing functionality of the Icom proprietary gateway software, as well as the proprietary D-Plus add-on have all since been reverse engineered, and mostly all by Scott. The AMBE chip can be bought in single quantities from DVSI for $20, or one can use the developed by Robin, AA4RC, and Moe, AE4JY. There is an open source replacement codec in development called, being developed by David, VK5DGR and endorsed by Bruce Perins, K5BP. However this is expected to be incompatible with the AMBE codec chip in the Icom Radios.