The CT-M is a recent addition to the Catdusa series by Whirlwind. It transmits four channels of analog audio over RJ45 Cat (Ethernet) cable in a compact form factor. It has four XLR-M connectors that are fed from an EtherCon input. 
 
The CT breakout boxes by Whirlwind are great as a small format sub-snake for sideline soloist and small ensemble stages, and for flexible cabling options in front ensembles.