Matrix: How to build an RJ45 to XLR adapter to get audio in and out of a matrix port
If you need to make a RJ45-to-XLR adapter cable from the MVX port of an Eclipse matrix Oomega, Median, Delta and Pico)
Using a standard CAT5 cable (using 568B standard CAT5 wiring), From the matrix port's perspective, the blue pair (pins 4 & 6) sends audio from the matrix port and the green pair (pins 3 & 5) brings audio into the matrix port.
See attached diagrams