Icom IC-M503 DSC Simulator
This is the GDMSS VHF DSC Simulator used in my training courses. It could be used stand-alone (single PC) or in a LAN network (multiple PC), simulating a real situation with more radio stations.
You may download and use for free for 15 days then it will be necessary to register. Usually registration is free for personal training but a small donation via Paypal is welcome. Download, unzip and install following installation instructions.
For more information, please send me an e-mail