7.2.3 Overhead cabling features Chapter 7. IBM DS8880 physical planning and installation  199 Figure 7-2 Overhead cabling for DS8880 Figure 7-2 shows the overhead cabling (top exit) feature. For more information, see the  IBM System Storage DS8880 Introduction and Planning Guide ,  GC27-8525. This feature requires the following items: The overhead cabling (top exit) feature, as shown in Figure 7-2, is available for DS8880 as an  alternative to the standard rear cable exit. Verify whether you ordered the top exit feature  before the tiles for a raised floor are cut. GLYPH<SM590000> Feature Code (FC) 1400 Top exit bracket for overhead cabling GLYPH<SM590000> FC1101 Safety-approved fiberglass ladder