Linksys WMB54G

Wireless-G Music Bridge

"WSPR-104_V02" and "ENG-D05-5202R" appears to be silkscreened on the board in the FCC photos.
 * 'tis a Gemtek WSPR-104G

This device is using a C-Media E3DX PCI audio device.

Additional specifications, per the FCC manual, follow...
 * Maximum supported wireless security: WEP
 * Transmit Power (typical)
 * 802.11b: 18 +- 1 dBm
 * 802.11g: 18 +- 1 dBm
 * Receiver Sensitivity (typical)
 * -83dBm @ 11Mbps
 * -67dBm @ 54Mbps
 * Unit weight: Weight::0.23 kg
 * Dimensions: Dimensions::141.6 mm x 130 mm x 95.5 mm (matches w/ the Gemtek datasheet)

Presumed 00:12:17 OUI (it's on the FCC EUT's board MAC label)..

Additional external links

 * On /dev/ttyS0