JLCooper eBOX GPI8 - Manual (Page 30)

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Preferences
The preferences are where you set the IP Address, port and the
optional password.
NOTE: The password feature is not currently implemented.
There are several IP Addresses and Ports built in to the eBOX
GPI8. They are set using the dip switches on the back of the
eBOX GPI8. Refer to the eBOX GPI8 manual for details. You
need to set the software to use the same address and port as the
hardware. The available ports are listed in the popup menu. With
the correct dip switch settings, and by choosing Custom from the
popup, you can define your own IP address and port.