|OK so tell us how tcp/ip [layer3] is going to make ANY difference at the physical level [layer1] which is what determines HOW much bandwidth you have?|
I don't believe you are making the connection between what has to happen physically and then logically to combine wan links.
You might want to web search bonding T1's for a real life example of combining bandwidth and how it works [its not 2x]
You could also ask the question of why do dual wan port routers exist and what nich they address.
BTW this isn't dialup.
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