Region : UnitedStates

Model : TL-WA7510N

Hardware Version : V1

Firmware Version : 3.12.6 Build 130427 Rel 69746n

ISP : Rhino Communications

Hello, I have 3 TP-Link devices connected to my router: 2x TL--WA7210N (works great!) and a single WA7510N which I use for connecting multiple Apple IOS devices on my rather large property. The 7510N comes up and works flawlessly for some time (perhaps several days):
Standard AP Mode
Channel Auto
Mode 11NA HT40 / 150Mbps
QSS Disabled
DHCP from router (LAN side DHCP disabled)
SSID Broadcast enabled
DFS disabled
WPA2-PSK / AES
No MAC filtering
Vertical Antenna
Beacon: 40, RTS: 2346, Frag: 2346, DTIM: 1
Enable WMM
Enable Short GI
Disabled AP Isolation
Indoor distance setting
SNMP disabled
Ping Watchdog disabled (but planning to enable it)
7510N POE is connected to APC 550 battery UPS (and so is my router, which is Cisco Linksys EA2700)

After some few days (seems random, intermittent), the 7510N hangs. When it hangs:
- 7510N LAN LED is flashing wildly
- Apple IOS devices say connected to WIFI, but no packet traffic possible from Safari browser
- router port LED which is connected to 7510N LAN port is flashing wildly (seems like 7510N is stuck broadcasting, but I have been unable to sniff the nature of the traffic).
- Access to 7510N management webpage is not possible.

Any ideas? I wish I can get the same stability that I have on 7210N...
thanks,
shorton