The telephone companies are asking for the same ability to sell
multiple
services over the same physical line. Cable companies didn't make
their
Internet service slower when they add more private services, why do
people expect the telephone companies to make their Internet service
worse when the telephone companies add private services to their
network?
Because they're telephone companies.
Because they can't manufacture bandwidth that isn't there. Cable
co's provide
broadband with a fraction of the loop capacity. For telco's to offer
premium
service, they have to take from the aggregate capacity. It's a zero
sum game,
and for the telco's to get more, the subscribers get less.
Tony