Administrations shall agree among themselves upon the operating methods best suited to the needs of the international relations which concern them, taking into account the conditions and the possibilities of operation
ITU-T E.112-1993 Referenced Document
ITU-T E.112 Arrangements to Be Made for Controlling the Telephone Services between Two Countries
ITU-T E.112-1993 history
1993ITU-T E.112-1993 Arrangements to Be Made for Controlling the Telephone Services between Two Countries
1988ITU-T E.112-1988 Arrangements to Be Made for Controlling the Telephone Services between Two Countries - Telephone Network and ISDN - Operation, Numbering, Routing and Mobile Service Study Group II; 1 pp