AVM FRITZ!Box Fon (Annex B). Modem speed: 8192 Kbit/s. Data link protocols: Ethernet, Fast Ethernet, Supported network protocols: VoIP, PPPoE. Compatible operating systems: Microsoft Windows XP, 2000, Me, 98; Linux (SuSE 9.0); Mac OS X 10.3.3 +. Minimum system requirements: - ADSL - LAN (Ethernet, 10BASE-T/100BASE-TX) - USB. Data compression: G.711, G.723.1, G.726, Maximum data transfer rate: 0.1 Gbit/s, Dimensions (WxDxH): 160 x 122 x 31 mm