We are digital radio enthusiasts and experimenters who live in northern Colorado. The Colorado Digital Multiprotocol group grew out of our activity on DMR, mostly on Brandmeister talkgroup 3171 (NoCO). With the rapid rise in hotspot development and adoption, we saw the need for a new talkgroup where we could focus on technical discussions. Thus was born Brandmeister talkgroup 31088 Colorado HD (Hotspot Discussion). Around the same time, other hams in our community requested Brandmeister talkgroups 31083 (Colorado Severe Weather) and 31084 (NoCO Mountain Front Range).
Shortly after Colorado HD was started, we became interested in linking different digital modes together in the same system- multiprotocol linking. We were spending time talking on existing multiprotocol systems and learning from the hams who created them and wanted to build our own. Our inspiration came from the Kings of Digital, Quadnet, and the XLX389 system developed by VK4TUX. So we worked to make Colorado HD a multiprotocol system of connected reflectors.
With the help of Alec N1AJW, we set up our first cloud-based reflectors for NXDN (31088), YSF (99256), and P25 (31088) and bridged those to Brandmeister talkgroup 31088. We were working towards building our own physical XLX reflector so we could transcode D-STAR<>DMR (which requires physical transcoding hardware) when we came across the Parker Radio Association's XLX376 reflector which has spare transcoding capability at the time. Ray N0KEG was generous enough to let us use one module on that system, so XLX376A was linked into Colorado HD. We now had 5 digital modes linked on Colorado HD!
Since then we have built our own XLX reflector (XLX303) and linked module D to Colorado HD, dropping the link from XLX376A. We also linked XLX303B to Brandmeister talkgroup 31084 (NoCO Mountain Front Range) and to YSF 18262 (Skynet- run by our friend N5LTC Chris). We call this system "Mountain Skynet."
Now that the system is built out, we continue to experiment with different modes, linking, and other projects. Stay tuned to see what's next.