I have googled your thread since I cannot understand Spanish. Do you mean that you want to open port on the device？ Make sure you have selected the correct PVC which you have the WAN IP address on...

I don't think so. It seems that the router cannot support this feature at all.

This link may help you checking out some factors which might affect the powerline rate: http://www.tp-link.com/en/article/?faqid=409

I have owned that modem. It's to connect with my computer’s USB interface, acting as a LAN port.