I have 3Com 10 MBS phoneline adapters for my home network. However an older computer, which I would like to add, does not support PCI 2.1 nor USB (as far as I can tell). I am considering using an Adaptec Parallel Port 1 MB phoneline adapter for it. Will it be able to communicate with the 3Com phoneline adapters, albeit more slowly, even though they are different brands?