By linking through a public data communication channels of the national telephone company, the telephone or the telephone cable, analog copy. Digital cable/satellite tv, microwave etc.
By linking to a communications channel through the public telephone company or organization, phone, countries such as analog phone lines. Cable, digital satellite, microwave, etc.
The link is through communication channels of public information of the telephone companies or Telephone organization of various countries, such as the analog telephone line. Digital cable, satellite, microwave, etc.