INTERNATIONAL TELECOMMUNICATION UNION ITU-T RECOMMENDATION SUMMARY Rec. No. : D.1 Title : General principles for the lease of international (continental and intercontinental) private telecommunication circuits and networks Study Group : III - Tariff and Accounting Principles Version : Revised Date of adoption : 1991 Notes : Recommendation D.1 sets out the general principles and conditions applicable to international (continental and intercontinental) private leased telecommunication circuits and networks, taking into account opportunities available to Administrations, or other organizations or persons to enter into special arrangements, subject to national laws (including national regulations), for the establishment, operations, and use of international private leased telecommunication circuits. Recommendation D.1 also indicates what is to be understood by the terms international private leased telecommunication circuits and national extensions. The international private leased telecommunication circuit service consists of making dedicated international telecommunication circuits available to a customer for use on the terms and conditions which may be set out in a lease agreement between the customer and the Administration of the country at each end of the circuit. Customers may also combine a series of such circuits to establish international private leased telecommunication circuit networks. Recommendation D.1 precises the conditions of lease (technical information to be provided by the customer, technical requirements, transmission quality, extraordinary circumstances), the conditions of use, the access (interconnection) to public networks, the principles applicable to duration, charging and cancellation of lease, particularly the provisions for allowances for interruptions. To order the complete text of this Recommendation, please use the Order Form for ITU-T Recommendations. An electronic version of this form is available on ITUDOC (Winword: UPI=ITU-5265; ASCII: UPI=ITU-2488).