[paolo]

Voip wont work any better based on the cable modem RF signals, it is actually already modulated well enough. AVoip will work well with a solid internet connection with low latency. is that what you are tryign to achieve? I would go ahead and try your drop amp, chances are, it might not really improve much, its ultimately rogers (or your local cable co) responsibility to ensure your modem is communicating properly with the cmts. Even though you can adjust your amp, you might end up amplifying more "noise" back to the line if you do not know what you are doing.