This is per what dacladder pm'd me when I asked him a few weeks ago:
"...to use a standard Ethernet cable wired straight through (no crossover) you will need to modify the M7 5-pin ribbon cable. Do this at the DSP board as that side is already wired funny.
The M7 DSP board header has two notches for polarity so looking from the front of the M7 these notches are facing you. Therefore the connector pins count left to right 1-2-3-4-5. On the DSP board side remove connector pins 2-3-4 from the connector housing. Pin 1 (GND) and 5 (MCLK) stay the same. Move the loose cable from pin 4 to its new home on the connector housing pin 2. Then reposition cable pin 2 to connector pin 3. And finally cable pin 3 to connector pin 4.
So at the DSP board header lift pin 4 and move to pin 2. Then move the other two down one notch. If you get confused an need to get back to square one the ribbon cable is currently wired RJ-45 board 1-2-3-4-5 go to DSP board header pins 2-4-3-5-1. Take a picture of your unmodified cable for reference."
I have already rearranged the cable as specified and could post a picture after I leave work. That said, no OR5....