To setup you tplink extender with router you need to Follow these steps :
At first you need the password of router that help you in setting up your extender.
Plugged in your extender nearby your router and then wait for 3 to 5 minutes .
Press the WPS button on your tplink Extender for 5 seconds and within 1 minute press the WPS button on your router for 5 seconds and wait for 5 minutes .
When you see all solid light on your extender then go to your computer or mobile phone and then go to the wifi over there. Where you see XYZ router_Ext network or tplink extender in the list.
Please connect your you devices with this network and put you router password ( If it ask for the password) . once you connected with that network then check internet is working fine, if it is then your extender is configured properly. Now if you want you will able to move your extender where ever you wanted.
First you need to reset the extender to its defaults setting
"With the Range Extender powered on, use a pin to press and hold the RESET button (about 8 seconds) until the System LED becomes quick-flash from slow-flash. And then release the button and wait the Range Extender to reboot to its factory default settings."
Push the WPS button on your main Router first, then immediately push the WPS button on your Range Extender.
The WPS process will last 2 minutes. You can wait 2 minutes, and then check the wireless signal LED of your Range Extender. If it’s on then your Range Extender has been successfully connected to your main Router.
Now you can put your Range Extender in a proper place where you want to extend the wireless network’s coverage, and enjoy the extended wireless network.