See 'WikiDevi' @ the Internet Archive (MW XML, Files, Images)
upgraded MW to 1.30 - maybe things are slightly less broken
Siemens Gigaset USB Adapter 54 (S30863-S1016-R107-2)
"MADE IN TAIWAN" and an Arcadyan / Accton P/N is silkscreened on the board in the FCC photos.
This device is shown pictured with a Conexant GW3887IK MAC/BB (Intersil ISL3887) in the FCC photos. A MAC label affixed to the back of the device in the same pictures has an OUI of 00:30:F1 (Accton).