The ETB-258 Interconnection of Two Port Network Trainer is designed to provide hands-on learning for understanding the interconnection of two-port networks in various configurations like series, parallel, cascade, and hybrid. This educational trainer is essential for studying the behavior of complex linear networks and analyzing their voltage and current relationships. The setup includes internal passive components, clearly marked test points, and measurement terminals, making it highly effective for practical experimentation in network theory and electrical circuit labs.