Atlona AT DVI 81A - Manual (Page 7)

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2. IR Extender Package
RS232
1. RS-232 Serial Interface
RS-232 serial interface allows connecting a control system or a computer to it for controlling the switcher
Pin RS-232 Definition
1 - Not used
2 Tx Transmitter
3 Rx Receiver
4 - Not used
5 GND Ground
6 - Not used
7 - Not used
8 - Not used
9 - Not used
1 5
6 9