ViewSonic LS920WU User Manual page 25

RS-232 Function: When the projector connects to HDBaseT by RS-232
communication, the projector can be controlled with RS-232 commands from
the computer. For details of RS232 commands, refer to RS-232 Communication
command table.
HDBaseT best practice:
1. When in doubt, use shielded Cat6 with shielded plugs.
2. Use proper grounding.
3. Isolate HDBaseT cat cables from other signal types.
The connection illustrations below are for reference only. The connecting jacks
available on the projector vary with each projector model. Some cables may not
be included with the projector. They are commercially available from electronics
stores.
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