Several years ago while commissioning some Cisco VTC systems at the Pentagon, I ran into an issue with the Cisco RoomDeviceDriver 3.4.? This was a SIMPL# driver with no source, but I was able to use the dotPeek decompiler from JetBrainsto extract all the source code and tracked down the problem (I did not modify the source code and recompile; instead I added a Serial I/O to work around it.