Data Transfer Switch with 4 Outputs A-B-C-D Type DB9 Serial Ports Network Switch

A Data Transfer Switch with 4 Outputs A-B-C-D Type DB9 Serial Ports is a manual switching device used to share a single serial connection among up to four different serial peripherals or computers. Function: It acts as a physical gate, allowing a user to manually switch a single input (A-B-C-D Common Port) to one of the four output channels (A, B, C, or D). This lets one computer control four serial devices (like modems, printers, or lab equipment) or lets four computers share a single serial device, but only one connection can be active at a time.