The following is what I understand from what you said on your configuration. Correct me if I am wrong.
You have Telus modem/router in the basement. Your Optic PVR and HD box are connected to the LAN ports of the Telus modem/router box. Your own router is connected to one of the LAN port of the Telus modem/router. As per SamKnows instruction, you connect the SamKnows white box to one of the LAN port on your router. Your wired devices/computers are connected to the LAN ports of the SamKnows white box
Mod: My posts is sort of off topic. You may want to move mstreeter post and my posts to a new thread if you want. Thanks