There are 3 different model for this sereis: 1. Adsl2+ router(a2r41-t) Integrated 4 port 10/100mbps switch Itu-t g.992.1 (annex a and annex b/etsi/u-r2) Itu-t g.992.3 g.992.4 g.922.5 (adsl2/adsl2+) 2. Adsl2+ super-g router(a2wr-t) Integrated wireless (802.11b/g) and super-g 108mbps and 4 port 10/100mbps switch Features: Itu-t g.992.1(g. Dmt) and g.992.2 (g. Lite) compliant for annex a, b Itu-t g.992.3, g.992.4 for adsl2 Itu-t g.992.5 for adsl2+ Downstream and upstream data rates up to 24mbps and 2mbps Configuration and management operated via browser with password protected access Firmware upgrade via ftp Wan and LAN side connection statistics Support super-g 108mbps wireless data rate compatibility with IEEE 802.11g and 802.11b (2.4ghz) standards Wireless security with up to 128-bit wep encryption All ethernet ports support auto-crossover (mdi/mdi-x)- no need for crossover cables Compliant with IEEE 802.3 and IEEE 802.3u 10/100 mbps Share your adsl2+ internet access on your wireless and ethernet networks Dmz and virtual server function provided operating modes include routing, bridge, static IP, pppoe, pppoa etc Technical specifications: Adsl2+ super-g (802.11g) router integrated 4 port 10/100mbps switch 3. Adsl2+ wireless-g router(a2sr-t) Integrated wireless (802.11b/g) 54mbpsand 4 port 10/100mbps switch Features: ANSI t1.413 issue 2, itu-t g.992.1(g. Dmt) and g.992.2 (g. Lite) compliant for annex a, b Itu-t g.992.3, g.992.4 for adsl2 Itu-t g.992.5 for adsl2+ Downstream and upstream data rates up to 24mbps and 2mbps Configuration and management operated via browser with password protected access Firmware upgrade via ftp Wan and LAN side connection statistics Support 54mbps wireless data rate Compatibility with IEEE 802.11g and 802.11b (2.4ghz) standards Wireless security with up to 128-bit wep encryption All ethernet ports support auto-crossover (mdi/mdi-x) - no need for crossover cables Compliant with IEEE 802.3 and IEEE 802.3u 10/100 mbps Share your adsl2+ internet access on your wireless and ethernet networks Dmz and virtual server function provided operating modes include routing, bridge, static IP, pppoe, pppoa etc Technical specifications: Adsl2+ wireless-g (802.11g) router integrated 4 port 10/100mbps switch