Emerald4K_Firmware_v6.0 firmware is compatible with other 6.0 endpoints.
The EMD4000R can connect to the EMD4000T, EMD200DV-T, Emerald SE/PE Transmitters using 6.x firmware or higher, but not to an Emerald SE/PE Receiver to an EMD4000T.
Firmware 6.0 is not compatible with Firmware 1.4.
EMD4000T cannot be accessed by any version of RemoteApp to date.