Buffalo WLM2-G54

Overview
Additional specifications, per [somemanuals.com/BUFFALO,WLM2-G54,HJABIE.PDF the manual], follow...
 * Antenna connector: MC, meant to be used with the Buffalo WLE-LNC MC->N-Female adapter
 * Power: 5VDC or PoE (802.3af draft 2.0)
 * Receive Sensitivity: -69 dBm to -92 dBm depending on the data rate
 * Output Power: 15 dBm, 1.2A nominal and 0.16A PoE
 * Dimensions: 169 mm (W) x 46 mm (H) x 195 mm (L)
 * Weight: Weight::620 g

Per the manual, the default SSID format is XXXXXXXXXXXX (w/ 00:07:40 OUI shown, so 000740XXXXXX), the default IP is 1.1.1.1 (w/ 255.255.0.0 netmask), and the default serial user is root.

Links of Interest
Manual (JP)

On the DD-WRT forums
 * The FCC ID was noted as QDS-BRCM1005.