microsoft have invested a lot of research money into the powerline data transfer.
Every powerpoint in your home can be a network port also if they pull that off.
New white goods that are power networked make sense for consumerism and product sales.
If your isp has the v92 protocol then u can recieve a call and answer it and hang within 30 seconds then u will still be online.
There isnt really a way to make 2 lines at once since there isnt a method of slicing out the voice sounds from the modem sounds.
You would need another phone line or have access to a telephone system account while online and using the pc and the phone.
Pull your phone from the line if u surf the net, It will greatly improve the impeedance on the line.
U can but cheaper broadband packages lately that are probably more economical for one user.
no website at moment