Supplement 25 to ITU-T K-series Recommendations (05/2021) ITU-T K.117 – Long reach single twisted-pair Ethernet resistibility testing
Summary
History
FOREWORD
Table of Contents
1 Scope
2 References
3 Definitions
     3.1 Terms defined elsewhere
     3.2 Terms defined in this Supplement
4 Abbreviations and acronyms
5 Conventions
6 SPE configuration
7 10 Mb/s, 1 km SPE overvoltage and overcurrent threats
     7.1 General
     7.2 Link transmission lines
     7.3 Earth potential rise surges
     7.4 1 km SPE threat levels
8 SPE component resistibility
     8.1 General
     8.2 Link cable
     8.3 Connectors
     8.4 Magnetics
     8.5 Ethernet PHY transceiver integrated circuit (IC)
     8.6 Power source and conversion ICs
     8.7 SPD protective functions
9 Ethernet SPE SPD testing
     9.1 General
     9.2 Surge tests
          9.2.1 General
          9.2.2 Common-mode surge
          9.2.3 Differential-mode surge
               9.2.3.1 Ethernet link
               9.3.2.2 NPD power feed and Ethernet signal limiting
          9.2.4 Common-mode to differential-mode surge conversion
          9.2.5 Cable screen terminal
     9.3 DC tests
          9.3.1 Insulation resistance
          9.3.2 DC voltage drop
     9.4 Identification and marking
          9.4.1 Marking
          9.4.2 Documentation
          9.4.3 Ordering information
10 Summary
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