3D perception proprietary serial communication used in WarpSync, and Eclipse Dynamic Optical Blenders (also for some legacy projectors) are using the RJ12 as a connector. Note that the RJ12 differs from RJ11 that is commonly used in telephone systems since it uses all 6 pins in the connector while RJ11 only uses 4.

All the different 3D perception hardware that needs to communicate by serial uses the RJ12 connector.

A serial port adaptor is needed to communicate with a computer