If a subscriber has digital phone service, where would calls to toll-free numbers be handed off? Are they handed off to the local telephone company at the closest co-lo to the physical location of the digital server that provides service to its subscriber? Are they handed off to the central office serving the polygon of the rate center (or wire center if different) based on (what the digital phone service provider thinks is the) service address, which could involve back-hauling traffic? Or do digital phone service networks interface directly with some long distance providers offering toll free service?20 years ago, I recall working in an office in which we used "9" as a trunk prefix to make long-distance calls, but "8" for local and toll-free calls.
11 years ago