said by mrx7 :sorry I'll be clearer cable modem and dgl4300 in separate buildings dgl4300 joins dgs1008 via underground cat6cable, wanting to use to-wa501g to give Me WiFi signal where now I Get little or no signal. does this clarify things 4u
No, it does not help. I (or anyone else offering advice) will need to know exactly how you have connected the TP-Link box, and how you have it configured. I still have no idea if you want to use the TP-Link box as an access point connected via an Ethernet cable to a switch, or if you are trying to use it as a stand-alone WiFi repeater, or as a bridge to an Ethernet segment in the second building.
My suggestion (if the equipment is physically able to be connected in this manner) would be to configure the TP-Link box as an access point, and connect it via Ethernet to the switch (which I am assuming is in the same building as the TP-Link box). If you do it that way, the TP-Link box won't need to have WiFi connectivity to your D-Link WiFi router because it would be connected via Ethernet (so the lack of WiFi visibility to the D-Link WiFi router would be moot). WiFi clients in the second building would connect to the TP-Link access point, and would also not need direct WiFi connectivity to the D-Link WiFi router.
