D-Link DGL-3420

Overview
"WL AP 2554 RA1" and "HW Rev A3" is silkscreened on the board in the FCC photos.

"WL AP 2554 RA1-B10" and "Rev V1.0" is silkscreened on (at least one) production model board.

Firmware notes

 * The firmware is compressed with arj
 * OS: ThreadX JADE/Green Hills Version G4.0.4.0
 * ar531x, 3.0.1.12, 18:00, 08 Dec, 2004, Build 1048 (dgl3420_firmware_100.bin)

Probable used PSU(s)
The power supply which seems to be bundled with US sold units looks to be a JENTEC JTA0302A. The connector is smaller than usual..

Serial Pinouts
It's on the back of the unit, presumably.

Tx seems to be the large used pad next to the two large grounded pads - both of which are somewhat below the power connector. The output doesn't appear to be particularly useful.. a trait which may be shared with other Global Sun AR231x + ThreadX devices..

Boot log
aaa bbb EZ