Black Box Data Broadcast Unit, RJ-11The Black Box Data Broadcast Unit, RJ 11 is a robust, turnkey solution for distributing asynchronous serial data from a single source to multiple slave devices. Engineered for classrooms, labs, control rooms, and production environments, this eight port broadcaster lets you stream data from an async CPU to printers, terminals, PCs, plotters, and other peripherals with minimal wiring complexity. With its RJ 11 style interface and per port DTE DCE