Siemens SCALANCE W700 series (W774 / W734)

This would appear to cover both the...
 * SCALANCE W734-1 RJ45 - Client Module
 * SCALANCE W774-1 RJ45 - Access Point

"SIEMENS" and "A5E32387781-AB" is silkscreened on the board in the FCC photos.

Per the FCC photos, a 00:1B:1B (Siemens AG) OUI is presumed to be used by these devices.