thanks for the reply.
i'm in north america.
no i hadn't done Factory Reset.

i'm using the router more as a wireless access point connected to my router via a LAN port on the 615.
the 615 is on the same 192.168.
2.0 255.255.255.0 network as my router. my router not the 615 handles the DHCP.
the 615 IP was changed to 192.168.2.1, and DHCP disabled on the 615.
devices are a couple of androids, ipod touch, ipad, and a laptop.
would interference cause the Wi-Fi to shut off?
i have cordless phones but the bases and phones are in other rooms.
i manually set up the router when i bought it with firmware 9.00NA
Enable Wireless √ Always
a long unique SSID is used
mode 802.11n only
Wireless Channel 1 (least used in my neighborhood. 6 is hammered)
Channel Width Auto 20/40MHz
Visibility Status Invisible
WPA personal
WPA2 only
cipher AES
Group key update interval 3600
long key used
i did a hard reset. and used settings above.
under advanced wireless settings
WLAN partition is enabled
WMM enable is checked
and greyShort GI enabled
HT20/40Mhz coexistence
enabled and grey.
i don't remember those setting being greyed out like that.
would prefer the more secure settings, and not have connected clients be able to connect to each other.
anyway, i did a hard reset, manually entered, and it's up and running. hoping for the best.
thanks