You mean the performance difference between 802.11g and 802.11n? Yes, it's something like 54 Mbit/s versus 150 Mbit/s wireless speed @20 MHz channel width. The CPE510 can perform up to 300 Mbit/s...

I did not try it so far. Also, I can't remember wether the old firmware version with region support did support channels 12 and 13 if set to an EU country. But I remember that once an upgrade is made...

No, during data transfers the port should not be shut down. Things to try: - Change the cable (just to make sure - even if you use brand-new cables it could be a faulty cable). - Try another port on...

Yes. Select "external antenna" in the wireless menu of the WA7210 and ensure to not exceed max. EIRP by using an antenna cable with appropriate attenuation.

Yes, could be the energy saving feature. Shouldn't be a problem if the port is activated on traffic.

EAPs are just access points, they don't make use of DNS (at least in current firmware releases). DNS settings are sent to clients directly from the DHCP server, so you need to change the settings in...