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For your system to be network equipment building system (NEBS) compliant, you must
follow the instructions detailed in this chapter.
To be NEBs compliant, orient your system in the rack so that the air inlet is from the front
aisle and the air exhaust is from the rear aisle.
Important information
WARNING:
The quad form-factor pluggable (QSFP), BaseT, console, Ethernet
management, and universal serial bus (USB) ports are suitable for connection to
intra-building or unexposed wiring or cabling only. You
connect the ports to interfaces that connect to the out side plant (OSP) or its
wiring. Use these interfaces as intra-building interfaces only—Type 2 or Type 4 ports
as described in GR-1089-CORE, Issue 6. Also, they require isolation from the
exposed OSP cabling. Adding primary protectors is not sufficient protection to
connect these interfaces metallically to OSP wiring.
WARNING:
If you install and connect the S4048T-ON to a commercial AC power
source, you must connect the system to an external special protection device
(SPD).
WARNING:
Use shielded intra-building cabling that is grounded at both ends for the
1/10GbE BaseT intra-building ports.
To be NEBS compliant, follow these regulations:
•
Locate your system in a restricted-access area were only trained personnel are allowed
access.
•
Install and connect your system to the common bonding network (CBN).
•
You can also install and connect your system to the central office.
•
Connect the battery returns of your system as DC-I.
4
NEBS compliance
NEBS compliance
MUST NOT metallically
2
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