Very similar router as WR841ND just with POE support.

There is a topic about this router (google translate it): http://openrouter.info/forum/viewtopic.php?t=2790&p=30893

Working images (tested wifi multi-net, bridge networking — AA 12.09) here: http://dl.eko.one.pl/barrier_breaker/ar71xx/ — seems to be 841ND's with id modified.

WikiDevi page: http://wikidevi.com/wiki/TP-LINK_TL-WR843ND

Warning! Be aware of input filter caps, which are rated only for 16V! (at least on v1.5), so 15V is absolutely maximum for PoE powering of this router

Main difference is that this router has 34063 UM-G1 445TA8 DC voltage regulator whose specifications show 40V DC as maximum allowed voltage, but recommended maximum voltage is 36V. So you can power this router with wide range of voltage: 5-36V DC.

Here is an image of DC voltage regulator: