Nortel Passport 7400, Установка оборудования, техническое обслуживание и устранение неисправностей, Страница: 54 / 438

54 Chapter 5 16-slot Passport switch installation
241-7401-240 5.2S1
• “Site preparation for a 19-inch rack” (page 54)
Site preparations for all installations
As part of site preparation for installing a Passport switch, consider the
following:
• Space and environmental requirements are outlined in 241-7401-200
Passport 7400 Hardware Description. Ensure that there is sufficient
clearance around all equipment for ventilation and physical access.
External cooling units may be required in equipment rooms that contain
a large number of other switches and networking equipment. The floor
plan must also allow sufficient room for other necessary equipment, (for
example, a local operator terminal, modem, or test equipment.
• Check your local building regulations and the technical specifications for
the switch, termination panels, cabinets, grounding, and so on, in
241-7401-200 Passport 7400 Hardware Description.
• Where there is a risk of tampering, ensure that you can lock the room.
• To satisfy safety requirements, you must connect ac grounds from all
equipment (including Passport cabinets, termination panel cabinets, and
local operator terminal), and external dc grounds to a single distribution
panel ground point. For ac powered Passport switches, the ac power
supply requires its own individually-fused electrical outlet. The power
supply for each switch must also be within 3 m (10 ft) of the electrical
outlet. Do not use extension cords.
• The maximum cable distance from a function processor to your
equipment varies for each line type. For more information, see cable
assembly information in 241-7401-200 Passport 7400 Hardware
Description.
• If cable routing is overhead, install termination panels in the top portion
of the rack; if cable routing is from the floor or a wall outlet, install
termination panels in the bottom portion of the rack.
• Sharp edges can damage cables. Therefore, smooth any rough edges
around cutouts.
Site preparation for a 19-inch rack
You can install any Passport switch in a standard 19-inch rack.