Nortel Passport 15000, Установка и обслуживание оборудования, Страница: 465 / 874

Chapter 17 Hardware procedures 465
Passport 15000, 20000 Hardware Installation, Maintenance, and Upgrade 5.2S2
Installing a fiber management unit
Install a fiber management unit to help manage fiber cables near the
Passport 15000 or 20000 switch.
Prerequisites
• You must be familiar with “Safety considerations and best practices”
(page 53).
• You need the optional hardware identified by PEC NTHW50. See the
figure “A dual-drawer fiber management unit NTHW50” (page 467).
• You need a NEBS 2000 frame or equivalent mounting apparatus that is
already installed with a space large enough to house the fiber
management unit.
• You need a helper to hold a fiber management unit until it is fastened
because it weighs 8.25 kg (18.2 lbs).
• The fiber management units do not require a deliberate gap between them
when installed one above the other.
• A fiber management unit does not require electrical grounding. When
mounted in a NEBS 2000 frame according to the installation procedure,
the unit is automatically grounded. When the fiber unit is installed in any
other mounting apparatus, follow its telecommunications grounding
rules.
• When installing the fiber unit in a 21-in. (53.34-cm) mounting apparatus
other than a NEBS 2000 frame, the 10-mm (3/8-in.) screws that are
provided with the fiber unit are likely to be inappropriate. You will need
to use mounting screws to match the mounting holes of the other
mounting apparatus.
• When the fiber management unit is to be installed in a NEBS 2000 frame
that has a switch in the bottom position, there is usually a shelf filler
panel at the upper front (NTHR76), rear (NTHR77), or both faces of the
frame. Before installing the fiber management unit, remove whichever
filler panel covers the position where you want the fiber management unit
(or units) to be installed. See the procedure “Removing a shelf filler
panel” (page 721). The 10-mm (3/8-in.) screws and the panel are no
longer needed for this installation.