I notice that the RJ45 pins on the te0703 route as differential pairs directly to the Artix-7 FPGA on the te0711 (no Phy chip in-between). Can I implement standard ethernet like this? I've only ever seen FPGAs attached to PHYs, never direct connect. Thanks!
No you can not. As TE0711 did not have PHY, we decided to "re-use" the PHY pins to provide more general purpose IO in the connector. This IO is only usable on custom baseboard.