The VADO One Way SecureCross Domain appliance, is a fiber optic-based channel, allowing unidirectional flow of data from public networks to secure networks while data flow in the opposite direction is physically impossible.
Since the security is based on a physical barrier, and reverse flow is blocked at the physical level no one can reverse the data flow, and data can never pass back to the public networks.
The VADO One Way Unidirectional Gateway consists of two units; a TX "send only" unit and an RX "receive only" unit. The units are connected with a single fiber unidirectional optical channel.