provide more detail of your requirement as well as your configuration, so other users can look into the issue and try to find a way out. What are you using this device for ? Do you want it to provide...

On Amazon.com TL-ANT2415D is 46 dollars. And you also need pigtail cable like TL-Ant24pt to connect the antenna to the router... TL-WA5110G is only 37 dollars. Serving 0.5KM will be over-demanding...

rns502 Distance setting is set 0.1 km ---- So what's the true distance between the two 5210? If they are only 100 meters apart, 31 dB is not ideal for such a small distance. And the Distance settings...

http://forum.tp-link.com/showthread.php?3015-2-WA7510N-AP-s-in-Bridge-Mode see post#5 for why all devices share the same MAC. This is not a problem or bug. If your DDWRT supports 4-address-format...

The Quick setup of 5210 has some problem. So Don't use Quick setup to configure!!! Reset the 3 AP and use wireless menu to re-configure them step by step. Have you try that?

Users should have a basic knowledge of WDS and OSI if he requires for wireless transparency. And he can find "enable WDS" option in wireless menu of TL-WA7510N in Client mode. Well, anyway, here I...