User manual

Installing Expansion (Data and Voice) Modules Passport 4400 Hardware Installation Module
6-5
Spacers
Spacersareattachedtotheinsideofthefront ofthe4400.Theyareusedtosecure
the expansion modules inside the unit.
Figure 6-4. Spacers
Blank Back Panels
Anyopenspacenotoccupiedbyamodulemustcontainablankbackpanel. Blank
backpanels ensure proper air flow over installed module,keep excessivedirt and
contamination out of the unit, and ensure compliance with radiated emissions
standards. Remove the blank back panels to accommodate new modules, and
reinstall a blank back panel if a module is removed.
Figure 6-5. Installation or Removal of Blank Back Panels
Blank Back
Panel