It could be argued that it violates the property rights of the corporation. Almost every restaurant has a sign that says, "We reserve the right to refuse service to anyone."
The telecoms built those wires. They installed the switches. It seems wrong to me to tell them how they must allow traffic to flow over them. Existing transportation companies aren't hounded by the Department of transportation because they charge more for a 12 cubic foot container than they charge for a 1 cubic foot container.
If a railroad wants to charge one company more than another company they can do that. If they want to limit the amount of goods they transport, they can do that. They can refuse to transport certain kinds of goods as well. Grains, liquids, explosives... Or charge a different rate...
How is the internet, where the packages are full of 1's and zeros different?