22.2.2 Maintenanceflow 359
22.3 Enablingthe Removalof theFanBackplane 359
22.4 Removingthe FanBackplane 360
22.4.1 Accessing thefan backplane 360
22.4.2 Removingthe fanbackplane 361
22.5 Installingthe FanBackplane 365
22.5.1 Installingthe fanbackplane 365
22.5.2 Restoringthe chassis 366
22.6 Restoringthe System 366
Chapter 23 Maintaining the Operation Panel of the Crossbar Box 367
23.1 Locationof theOperation Panel 367
23.2 BeforeMaintaining theOperation Panel 368
23.2.1 Types ofmaintenance 368
23.2.2 Maintenanceflow 369
23.2.3 Precautions forreplacement 369
23.3 Enablingthe Removalof theOperationPanel 369
23.4 Removing theOperation Panel 370
23.4.1 Accessing theoperation panel 370
23.4.2 Removing theoperation panel 373
23.5 Installingthe OperationPanel 375
23.5.1 Installingthe operationpanel 376
23.5.2 Restoringthe chassis 377
23.6 Restoringthe System 378
Chapter 24 Maintaining the Crossbar Cables (Electrical) 379
24.1 Configurationof thePortsfortheCrossbarCables(Electrical) 379
24.2 BeforeMaintaining aCrossbar Cable(Electrical) 381
24.2.1 Types ofmaintenance 381
24.2.2 Maintenanceflow 381
24.2.3 Precautions forreplacement 382
24.3 Enablingthe Removalof aCrossbarCable (Electrical) 382
24.3.1 Inactive/Coldmaintenance 382
Contents xv