Product Instructions:1.DB9 port, which expands display devices through network cables2.This switch cable can be used to switch to the RS232 serial port.The DB9 9-pin serial port is used to connect a host computer or various monitors.3.The network cable can be connected to the network cable interface of the two switch cables respectively.4.The product transfer cable only uses the network cable as the transmission medium, instead of converting the network signal to the DB9 signal. RJ45 to RS232 patch cable Male or female connector transmits DB9 signal via cable.
