The DMR Sandbox is a project sponsored by DMR-MARC <http://dmr-marc.net/> for experimenters who want to develop new features specifically for amateur radio DMR while not disrupting a large and stable network with many users. While DMR-MARC is a very structured network focused on stability and availability in 19 countries, the DMR Sandbox is much smaller. Patches between DMR and other technologies such as D-Star, Allstar, Echolink, and IRLP are permitted on the Sandbox network. However, the sandbox network does not feature any connections to DMR-MARC, DCI, or Hytera international, national, or statewide DMR networked talkgroups. The DMR-Sandbox is a unique network, with unique talkgroups, and a unique purpose! To learn more or contact the DMR Sandbox custodian visit: http://dmr-marc.net/sandbox.html -or- just visit http://dmr-marc.net <http://dmr-marc.net/> and click on "Innovators" at the top of the page. 73, Mike, AA9VI