5.2 Environmental Requirements for Device Operation.................................................................................................... 69

5.2.1 Environmental Requirements for an Equipment Room............................................................................................ 69

5.2.2 Requirements for Power Supply................................................................................................................................77

5.3 Equipment Grounding Specifications...........................................................................................................................80

5.3.1 General Grounding Specifications.............................................................................................................................80

5.3.2 Grounding Specifications for an Equipment Room.................................................................................................. 80

5.3.3 Grounding Specifications for Devices.......................................................................................................................80

5.3.4 Grounding Specifications for Communications Power Supply.................................................................................81

5.3.5 Grounding Specifications for Signal Cables............................................................................................................. 82

5.3.6 Specifications for Laying Out Grounding Cables..................................................................................................... 82

5.4 Engineering Labels for Cables..................................................................................................................................... 83

5.4.1 Introduction to Labels................................................................................................................................................83

5.4.2 Engineering Labels for Optical Fibers.......................................................................................................................91

5.4.3 Engineering Labels for Network Cables................................................................................................................... 94

5.4.4 Engineering Labels for User Cables.......................................................................................................................... 95

5.4.5 Engineering Labels for Power Cables....................................................................................................................... 96

5.5 Guide to Using Optical Modules.................................................................................................................................. 99

5.6 Fault Tag..................................................................................................................................................................... 102

5.7 Installation Checklist.................................................................................................................................................. 103

Issue 01 (2016-04-15)

Huawei Proprietary and Confidential

Table of Contents