4.2.8 Post-Installation Check................................................................................................................................................. 616

4.2.9 Power-on Check............................................................................................................................................................... 619

4.2.10 (Optional) Checking Optical Power....................................................................................................................... 621

4.2.11 Maintenance of the device........................................................................................................................................ 623

4.2.11.1 Basic Operation Process and Precautions......................................................................................................... 623

4.2.11.2 Replacing a power module.................................................................................................................................... 626

4.2.11.2.1 Replacing the DC Power Module..................................................................................................................... 626

4.2.11.2.2 Replacing the AC Power Module......................................................................................................................628

4.2.11.3 Replacing the Fan Module..................................................................................................................................... 629

4.2.11.4 Replacing an Optical Module............................................................................................................................... 631

4.2.11.5 Replacing an Optical Cable................................................................................................................................... 636

4.2.11.6 Replacing a Network Cable................................................................................................................................... 638

4.2.12 Appendix.......................................................................................................................................................................... 640

4.2.12.1 Environmental Requirements for Device Operation..................................................................................... 640

4.2.12.1.1 Environmental Requirements for Equipment Room.................................................................................. 640

4.2.12.1.2 Requirements for Power Supply....................................................................................................................... 648

4.2.12.2 On-site Cable Assembly and Installation.......................................................................................................... 651

4.2.12.2.1 Cable Assembly Precautions.............................................................................................................................. 651

4.2.12.2.2 Assembling Power Cables................................................................................................................................... 652

4.2.12.2.3 Assembling Ethernet Cables.............................................................................................................................. 668

4.2.12.2.4 Installing Cable Accessories............................................................................................................................... 682

4.2.12.2.5 Installing Ethernet Adapters.............................................................................................................................. 686

4.2.12.2.6 Installing Fiber Connectors................................................................................................................................. 689

4.2.12.2.7 Replacing the Mold of the Crimping Tool..................................................................................................... 696

4.2.12.3 Equipment Grounding Specifications................................................................................................................. 699

4.2.12.3.1 General Grounding Specifications.................................................................................................................... 699

4.2.12.3.2 Grounding Specifications for Equipment Room.......................................................................................... 700

4.2.12.3.3 Grounding Specifications for Devices............................................................................................................. 700

4.2.12.3.4 Grounding Specifications for Communications Power Supply............................................................... 701

4.2.12.3.5 Grounding Specifications for Signal Cables.................................................................................................. 701

4.2.12.3.6 Specifications for Laying Out Grounding Cables........................................................................................ 702

4.2.12.4 Engineering Labels for Cables...............................................................................................................................702

4.2.12.4.1 Introduction to Labels.......................................................................................................................................... 703

4.2.12.4.2 Engineering Labels for Optical Fibers............................................................................................................. 710

4.2.12.4.3 Engineering Labels for Network Cables.........................................................................................................712

4.2.12.4.4 Engineering Labels for User Cables................................................................................................................. 714

4.2.12.4.5 Engineering Labels for Power Cables..............................................................................................................715

Issue 05 (2023-03-31)

Table of Contents