1.5 Prerequisites/Preconditions

The Remote Desktop Protocol: Virtual Channel Echo Extension operates only after the dynamic virtual channel transport, as specified in [MS-RDPEDYC] sections 1 to 3, is fully established. If the dynamic virtual channel transport is terminated, the Remote Desktop Protocol: Virtual Channel Echo Extension is also terminated. The protocol is terminated by closing the underlying dynamic virtual channel. For details about closing the dynamic virtual channel, refer to [MS-RDPEDYC] section 3.2.5.2.