Using Telephone Networks (Analog) for Data Communications (Digital)
Local loop: In a telephone network, the “last mile” which connects home or office to telephone company’s central office
Central Office, end office or Exchange office contains the switching facilities operated by the telephone company.
Private Leased Circuit refers leasing a private circuit path and bypassing switching at the central office
Interchange Channels/Circuits (IXC) are the circuits that go from one telephone company central office to another central office (coaxial, fiber, satellite etc.)
Common Carrier is a company recognized by FCC or an appropriate state licensing agency as having the right to furnish telecommunications services to individual subscribers or business organizations