Matrix Switching System—User Manual236.6 Ports and SwitchersThe Matrix Switcher provides standard RS-232 and RS-485 serial communication ports.Beside the front panel for key switching operation, you can also use the RS-232 orRS-485 serial communication port to carry out remote operation.6.6.1 RS-232The RS-232 Pin functions are described as below:Pin No. Abbreviation Description1 N/u Null2 TXD Send3 RXD Receive4 N/u Null5 GND Ground6 N/u Null7 N/u Null8 N/u Null9 N/u Null The Matrix RS-232 port is defined by DCE.
