On your wireless devices, can you login web interface of C9 with http://192.168.0.1? If you reset the router, did you reconfigure Wi-Fi name and password? Can you forget the Wi-Fi network on iOS...

Unfortunately...yes...no QOS function.

You can make it work in bridge with AP mode but it will disconnect constantly? Refer to the guide below and check your configuration step by step. If the problem continues, you may contact the...

You are right...It is running the latest firmware now. http://forum.tp-link.com/showthread.php?80292-TL-PA4010-drops-multicast-packets&p=158193&viewfull=1#post158193

[PHP][/PHP]The Utility can be running on WinXP/Vista/8, Win 8.1 excluded... As I know, TP-LINK driver is not compatible with Windows 8.1 very well... You'd better install the chipmaker's driver for...

Bandwidth Control is designed to minimize the impact caused when the connection is under heavy load. It cannot make the voice data have the highest priority for the whole network like QOS.