How To Enable WPS on TP-Link VR1600v
This article will step you through enabling WPS on TP-Link VR1600v.
Open your browser and in the address bar type http://192.168.1.1 . Enter admin for both the username and password then click Login.
If you have changed the login credentials, please enter the current username and password for your modem interface.
Go to Advance Tab and look for Wireless on the left panel.
After you click on Wireless, a set of option will come up. Go to Advance Settings then look for WPS and Enable it.
Click on Save.
I have followed your instructions but the admin username and password is being rejected as invalid. I have not done anything to change it from the default
All fixed-an invisible space!