I have read all posts, either DAP-1360 and DIR-655, found that I may interest to join the hot post in "New DIR-655: wireless Internet occasionally drops out" by wireless925 to find out which devices cuase internet drop out.
my hardware version is A4 and the Firmware version is 1.35EA
my region is Thailand
my ISP Service is DSL
my ISP Modem is Dlink 2640T Stand Alone, connection type=Bridge mode to DIR-655 router (I turn off wireless mode of Dlink 2640T which used to be my old ADSL wireless router)
Setup DHCP reserved IP addresses for all devices ON the router.
Ensure devices are set to auto obtain an IP address. (DIR-655 has fixed IP 192.168.0.1, DAP-1360 was assigned a DHCP reserved IP 192.168.0.13. I notice that I can browse to admin page of DAP-1360 with IP 192.168.0.50 or 192.168.0.13, while a Device Info of DAP-1360 said LAN IP is 192.168.0.13)
my wireless mode is mixed 802.11n and 802.11g (I notice again that with DAP-1360 setup wizard, it will be assigned wireless mode to be mixed 802.1n/802.11g/802.11b)
my wireless channel fix to 6
my channel width is Auto 20/40 MHz (I notice again that with DAP-1360 setup wizard, it will be assigned channel width to be 20 MHz, not auto channel)
Advanced wireless : default
the DIR-655 has 82% signal with 130 Mbps to the dap-1360
my security mode is WPA2 Only/AES
off/diable features: Traffic Shaping, QoS Engine, WISH, WPS
inSSIDer 2.1 say my ssid for repeater RSSI=-52, router RSSI=-58, other ISP SSID RSSI < -65, other channel 6 RSSI < -70
One conclusion from my trial is DAP-1360 wizard setup is not the same as a manual setup that I try to match/sync with DIR-655 router setting. I will keep many trials to find out a solution. I need times to ensure that I will not face the internet drop out.