ITU-T Rec. G.652 (10/2000) Characteristics of a single-mode optical fibre cable

This Recommendation describes the geometrical and transmission attributes of single-mode optical fibre and cable with chromatic dispersion and cutoff wavelength that are not shifted from the 1 310 nm wavelength region. Definitions and test methods are contained in a separate ITU-T G.650. Tables of recommended values for different sub-categories of this fibre type are provided to allow ease of reference with regard to the type of system that is supported. Sub-categories described in the tables may differ for technological aspects or for the intended application. Allowed ranges are recommended for both fibre and cable attributes. Information for link attributes and system design is found in Appendix I. FOREWORD The International Telecommunication Union (ITU) is the United Nations specialized agency in the field of telecommunications. The ITU Telecommunication Standardization Sector (ITU-T) is a permanent organ of ITU. ITU-T is responsible for studying technical, operating and tariff questions and issuing Recommendations on them with a view to standardizing telecommunications on a worldwide basis. The World Telecommunication Standardization Assembly (WTSA), which meets every four years, establishes the topics for study by the ITU-T study groups which, in turn, produce Recommendations on these topics. The approval of ITU-T Recommendations is covered by the procedure laid down in WTSA Resolution 1. In some areas of information technology which fall within ITU-T's purview, the necessary standards are prepared on a collaborative basis with ISO and IEC. NOTE In this Recommendation, the expression "Administration" is used for conciseness to indicate both a telecommunication administration and a recognized operating agency. INTELLECTUAL PROPERTY RIGHTS ITU draws attention to the possibility that the practice or implementation of this Recommendation may involve the use of a claimed Intellectual Property Right. ITU takes no position concerning the evidence, validity or applicability of claimed Intellectual Property Rights, whether asserted by ITU members or others outside of the Recommendation development process. As of the date of approval of this Recommendation, ITU had not received notice of intellectual property, protected by patents, which may be required to implement this Recommendation. However, implementors are cautioned that this may not represent the latest information and are therefore strongly urged to consult the TSB patent database.