NK1300 module optical time domain reflectometer integrated 8/16 channel MEMS optical switch, with a number of output optical interfaces, with standard Ethernet port as the control interface for secondary development, through wired networking, PC or embedded system to OTDR module to issue measurement commands, and receive the module's return results to complete the work. The module supports user secondary development, and helps users to develop their own professional OTDR or optical fiber online monitoring system (that is, network management system) at the fastest speed.