[moreati]

> I'm running USB 1.1 on the inner pairs and Ethernet on the USB 3 pairs for several projects

That sounds like a nice trick. Could you elaborate, or is there any public information you could link to?

[bsder]

Nothing proprietary. Just look at a Type C pinout.

http://arstechnica.com/gadgets/2015/01/usb-3-1-and-type-c-th...

Two TX pairs/Two RX pairs. Standard USB 2.0 in the middle.