The High Sec Labs Secure RS-232 Cross-Domain Isolators are hardware devices designed to enforce unidirectional data flow between two otherwise separated networks via RS-232 serial connections. The product family includes multiple models: - FF11N-4: RS-232 Configurable Filter - FT11N-4: RS-232 Isolator - FXJ11N-4: RS-232 Isolator variant suited for command and monitoring scenarios - CP11N-4: Designed specifically for user-prompted copy-and-paste text transfer between two Windows computers, moving selected text unidirectionally to a destination computer These isolators receive an RS-232 command from a connected device and transmit it in one direction only to its destination, with no return signal path from the destination back to the originating device. This architecture prevents data leakage between networks operating at different security levels. Use cases include SCADA systems, system synchronization, control commands, and information sharing between separated networks. The configurable models support rule creation using regular expressions to filter transmitted data, allowing administrators to restrict the types of events and commands that can pass through the isolator. The devices are BAA (Buy American Act) and TAA (Trade Agreements Act) compliant, indicating suitability for U.S. government procurement. The product falls under the Secure Isolators category within High Sec Labs' Cross-Domain Solutions portfolio.