XH-DSW-1X2 shell optical switch module is a light path control device, which has the function of controlling the light path and converting the light path; it can realize 2 paths of optical signal input, select one of the signal outputs (supporting bidirectional use), and the module supports buttons Manual switching and RS-232 serial port command control. It plays an important role in optical communication applications. Optical switches are mainly used in multi-channel optical monitoring in optical transmission systems, LAN multi-light source/detector automatic switching, and optical sensing multi-point dynamic monitoring system optical test systems for optical fibers, optical devices, networks and field engineering optical cables Test; optical device installation and adjustment.