OK
Presently have a Brother HL-4570CDW laser printer set up wireless on my network ... and it functions well.

Setup was easy (even for a novice).
1. On the printer, manually started the network setup.
2. At one point, choose option WPS, and then pressed on the same button on the side of the DIR-615 router.
3. Printer and router recognized each other ... and a specification page was printed.
4. I went on the D-Link Setup access screen and reserved the shown IP for the printer to be static.
5. Logged on to the printer setup screen on the web by typing in the printer's IP (as reserved on the router).
6. Modified specs as required (static IP, Network key, etc.).
I'm a happy camper with this one.

I'm anxious to see how it functions with other PCs on my network (especially the one on VPN).
Note: Yesterday I have tried setting up a Samsung CLP325W ... with no success at all. I could use it with cable ... but not wireless. I have returned this morning and purchase the Brother HL-4570CDW ... and am very happy with it (up until now LOL).
Thanks for your help in insight everyone! It is very appreciated!
Normand