Grounding considerations
Only time synchronization cables specified for NT20E3-2-PTP-NEBS in DN-0186 must be used. The time synchronization cables must not be
electrically connected directly to outside-plant cables.
Warning: The intra-building port(s)
(external time synchronization connector) of the equipment or subassembly is suitable for
connection to intra building or unexposed wiring or cabling only. The intra-building
port(s) of the equipment or subassembly MUST NOT be metallically connected to interfaces
that connect to the OSP or its wiring. These interfaces are designed for use as
intra-building interfaces only (Type 2 or Type 4 ports as described in GR-1089-CORE) and
require isolation from the exposed OSP cabling. The addition of Primary Protectors is not
sufficient protection in order to connect these interfaces metallically to OSP
wiring.
Warning: The intra-building port(s)
(external time synchronization connector) of the equipment or subassembly must use
shielded intra-building cabling/wiring that is grounded at both ends.
The NT20E3-2-PTP-NEBS
SmartNIC must be installed in a CBN (common bonding network) per NEBS GR-1089.
The NT20E3-2-PTP-NEBS SmartNIC was evaluated as ITE (information technology equipment),
which may be installed in central offices, telecommunication centers, offices, schools,
computer rooms, and similar commercial type locations. The suitability of the SmartNIC for
other product categories and environments (medical, industrial, residential and so on) other
than an ITE application, may require further evaluation.
Altitude considerations
No special requirements are needed for installations above 1829 m (6000 ft).