IEC 60793-2-50:2018 is available as \/2 which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition. IEC 60793-2-50: 2018 is applicable to optical fibre categories B-652, B-653, B-654, B-655, B 656 and B-657. A map illustrating the connection of IEC designations to ITU-T designations is shown in Table 1. These fibres are used or can be incorporated in information transmission equipment and optical fibre cables. Three types of requirements apply to these fibres: \u2022 general requirements, as defined in IEC 60793-2; \u2022 specific requirements common to the class B single-mode fibres covered in this document and which are given in Clause 5; \u2022 particular requirements applicable to individual fibre categories or specific applications, which are defined in Annexes A to F. For some fibre categories (shown in the relevant family specifications), there are sub-categories that are distinguished on the basis of difference in transmission attribute specifications. The designations for these sub-categories are documented in the individual family specifications. The sixth edition cancels and replaces the fifth edition published in 2015. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) Introduction of a revised naming convention which better matches with those found in ITU T Recommendations G.652, G.653, G.654, G.655, G.656, and G.657. These changes are outlined in the scope of this document along with a cross reference table for the new names. Annexes have been rearranged to improve clarity based on the new naming; b) Further details on the requirements for 200 micron coated single-mode fibre; c) Harmonization with the following ITU-T Recommendations published in November 2016: G.652, G.654, G.657 including revised chromatic dispersion specifications, new categories and new application spaces for these fibre categories; d) Descriptions of fibre types have been added to the titles of Annexes A to F. Keywords: information transmission equipment, optical fibre cables<\/p>\n
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| 61<\/td>\n | undefined <\/td>\n<\/tr>\n | ||||||
| 64<\/td>\n | Annex ZA(normative)Normative references to international publicationswith their corresponding European publications <\/td>\n<\/tr>\n | ||||||
| 66<\/td>\n | English CONTENTS <\/td>\n<\/tr>\n | ||||||
| 69<\/td>\n | FOREWORD <\/td>\n<\/tr>\n | ||||||
| 71<\/td>\n | 1 Scope <\/td>\n<\/tr>\n | ||||||
| 72<\/td>\n | 2 Normative references Tables Table 1 \u2013 Map of IEC designation to ITU-T Recommendations andIEC 60793-2-50:2015 designation <\/td>\n<\/tr>\n | ||||||
| 73<\/td>\n | 3 Terms and definitions <\/td>\n<\/tr>\n | ||||||
| 74<\/td>\n | 4 Abbreviated terms and symbols 5 Specifications 5.1 General 5.2 Dimensional requirements <\/td>\n<\/tr>\n | ||||||
| 75<\/td>\n | 5.3 Mechanical requirements Table 2 \u2013 Dimensional attributes and measurement methods Table 3 \u2013 Dimensional requirements common to all category B fibres Table 4 \u2013 Mechanical attributes and test methods <\/td>\n<\/tr>\n | ||||||
| 76<\/td>\n | 5.4 Transmission requirements Table 5 \u2013 Mechanical requirements common to all class B fibres Table 6 \u2013 Transmission attributes and measurement methods <\/td>\n<\/tr>\n | ||||||
| 77<\/td>\n | 5.5 Environmental requirements 5.5.1 General Table 7 \u2013 Transmission, requirements common to all class B fibres Table 8 \u2013 Additional transmission attributes required in the family specifications Table 9 \u2013 Environmental exposure tests Table 10 \u2013 Attributes measured in environmental exposure tests <\/td>\n<\/tr>\n | ||||||
| 78<\/td>\n | 5.5.2 Optical environmental requirements \u2013 Attenuation 5.5.3 Mechanical environmental requirements Table 11 \u2013 Change in attenuation for environmental tests Table 12 \u2013 Coating strip force for environmental tests <\/td>\n<\/tr>\n | ||||||
| 79<\/td>\n | Table 13 \u2013 Tensile strength for environmental tests Table 14 \u2013 Stress corrosion susceptibility for environmental tests <\/td>\n<\/tr>\n | ||||||
| 80<\/td>\n | Annexes Annex A (normative) Family specification for category B-652 Dispersion unshifted single-mode fibres A.1 General A.2 Dimensional requirements Table A.1 \u2013 Dimensional requirements specific to category B-652.B fibres <\/td>\n<\/tr>\n | ||||||
| 81<\/td>\n | A.3 Mechanical requirements A.4 Transmission requirements Table A.2 \u2013 Dimensional requirements specific to category B-652.D fibres Table A.3 \u2013 Mechanical requirements specific to category B-652 fibres <\/td>\n<\/tr>\n | ||||||
| 82<\/td>\n | Table A.4 \u2013 Transmission requirements specific to sub-category B-652.B fibres Table A.5 \u2013 Transmission requirements specific to sub-category B-652.D Fibres <\/td>\n<\/tr>\n | ||||||
| 83<\/td>\n | A.5 Hydrogen ageing for sub-category B-652.D A.6 Environmental requirements Table A.6 \u2013 Chromatic dispersion properties for sub-category B-652.D fibres <\/td>\n<\/tr>\n | ||||||
| 84<\/td>\n | Annex B (normative) Family specification for category B-653 Dispersion shifted single-mode fibres B.1 General B.2 Dimensional requirements Table B.1 \u2013 Dimensional requirements specific to category B-653 fibres <\/td>\n<\/tr>\n | ||||||
| 85<\/td>\n | B.3 Transmission requirements B.3.1 General B.3.2 Chromatic dispersion coefficient requirement for sub-category B-653.A fibres Table B.2 \u2013 Mechanical requirements specific to category B-653 fibres Table B.3 \u2013 Transmission requirements specific to category B-653 fibres <\/td>\n<\/tr>\n | ||||||
| 86<\/td>\n | B.3.3 Chromatic dispersion coefficient requirement for sub-category B-653.B fibres B.4 Environmental requirements <\/td>\n<\/tr>\n | ||||||
| 87<\/td>\n | Annex C (normative) Family specification for category B-654 cut-off shifted single-mode fibres C.1 General C.2 Dimensional requirements C.3 Mechanical requirements Table C.1 \u2013 Dimensional requirements specific to category B-654 fibres <\/td>\n<\/tr>\n | ||||||
| 88<\/td>\n | Table C.2 \u2013 Mechanical requirements specific to category B-654 fibres Table C.3 \u2013 Transmission requirements specific to category B-654 fibres <\/td>\n<\/tr>\n | ||||||
| 89<\/td>\n | C.4 Chromatic dispersion parameters for B-654.E fibres C.5 Environmental requirements <\/td>\n<\/tr>\n | ||||||
| 90<\/td>\n | Annex D (normative) Family specification for category B-655 non-zero dispersion shifted single-mode fibres D.1 General D.2 Dimensional requirements D.3 Mechanical requirements Table D.1 \u2013 Dimensional requirements specific to category B-655 fibres <\/td>\n<\/tr>\n | ||||||
| 91<\/td>\n | D.4 Transmission requirements D.4.1 General D.4.2 Chromatic dispersion coefficient limits for sub-category B-655.C fibres Table D.2 \u2013 Mechanical requirements specific to category B-655 fibres Table D.3 \u2013 Transmission requirements specific to category B-655 fibres <\/td>\n<\/tr>\n | ||||||
| 92<\/td>\n | D.4.3 Chromatic dispersion coefficient limits for sub-category B-655.D fibres D.4.4 Chromatic dispersion coefficient limits for sub-category B-655.E fibres D.5 Environmental requirements <\/td>\n<\/tr>\n | ||||||
| 93<\/td>\n | Annex E (normative) Family specification for category B-656 Wideband non-zero dispersion shifted single-mode fibres E.1 General E.2 Dimensional requirements E.3 Mechanical requirements Table E.1 \u2013 Dimensional requirements specific to category B-656 fibres <\/td>\n<\/tr>\n | ||||||
| 94<\/td>\n | E.4 Transmission requirements E.4.1 General E.4.2 Chromatic dispersion coefficient for category B-656 fibres Table E.2 \u2013 Mechanical requirements specific to category B-656 fibres Table E.3 \u2013 Transmission requirements specific to category B-656 fibres <\/td>\n<\/tr>\n | ||||||
| 95<\/td>\n | E.5 Environmental requirements <\/td>\n<\/tr>\n | ||||||
| 96<\/td>\n | Annex F (normative) Family specification for category B-657 Bending loss insensitive single-mode fibres F.1 General F.2 Dimensional requirements <\/td>\n<\/tr>\n | ||||||
| 97<\/td>\n | F.3 Mechanical requirements F.4 Transmission requirements Table F.1 \u2013 Dimensional requirements specific to category B-657 fibres Table F.2 \u2013 Mechanical requirements specific to category B-657 fibres <\/td>\n<\/tr>\n | ||||||
| 98<\/td>\n | Table F.3 \u2013 Transmission requirements specific to category B-657 fibres <\/td>\n<\/tr>\n | ||||||
| 99<\/td>\n | F.5 Environmental requirements <\/td>\n<\/tr>\n | ||||||
| 100<\/td>\n | Annex G (informative) System design information for category B-655 non-zero disperion shifted single-mode fibres G.1 General G.2 One standard deviation limits for sub-category B-655.D fibres Table G.1 \u2013 Examples for \u03bbmin = 1 530 nm and \u03bbmax = 1 565 nm <\/td>\n<\/tr>\n | ||||||
| 101<\/td>\n | G.3 One standard deviation limits for sub-category B-655.E fibres Figures Figure G.1 \u2013 Sub-category B-655.D chromatic dispersion coefficient limits <\/td>\n<\/tr>\n | ||||||
| 102<\/td>\n | Figure G.2 \u2013 Sub-category B-655.E chromatic dispersion coefficient limits <\/td>\n<\/tr>\n | ||||||
| 103<\/td>\n | Bibliography <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":" Tracked Changes. Optical fibres – Product specifications. Sectional specification for class B single-mode fibres<\/b><\/p>\n |