Only time synchronization cables specified for NT50B01 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 SMA 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.
intra-building port(s) (external SMA time synchronization connector) of the equipment or
subassembly must use shielded intra-building cabling/wiring that is grounded at both
The NT50B01 SmartNIC must be
installed in a CBN (common bonding network) per NEBS GR-1089.
The NT50B01 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
No special requirements are needed for installations above 1829 m (6000 ft).