AVocation Systems HX-0808HA/8 - Manual (Page 6)

C1
Section C - Control Connections
The HX series of matrices can be controlled via RS-232, USB, Ethernet and infrared.
RS-232 Connections to the matrix use a null modem cable from the controller.
The default communications parameters are:
Receive (Pin 2)
Transmit (Pin 3)
Ground (Pin 5)
Infrared
Teaching
Output
Baud Rate 19200 baud
Bits 8
Parity None
Stop Bits 1
Infrared
Control
Input
USB Control
Ethernet Control
The default Ethernet connection is:
IP
Address: DHCP
Port: 9760