Glossary
N
Centillion 1200N ATM Switch User Manual
B-49
NTP 297-8103-903
NEF
Network Element Function: A function within an ATM entity that supports the
ATM based network transport services, (e.g., multiplexing, cross-connection).
Neighbor Node
A node that is directly connected to a particular node via a logical link.
NEL
Network Element Layer: An abstraction of functions related specifically to the
technology, vendor, and the network resources or network elements that provide
basic communications services.
NEXT
Near End Crosstalk: Equipment that must concurrently receive on one wire pair and
transmit on another wire pair in the same cable bundle must accommodate NEXT
interference. NEXT is the portion of the transmitted signal that leaks into the
receive pair. Since at this point on the link the transmitted signal is at maximum and
the receive signal has been attenuated, it may be difficult to maintain an acceptable
ACR with the received signal if the cable media allows large amounts of crosstalk
leakage to occur. Foiled or shielded cables generally have less crosstalk than
unshielded varieties.
NIC
Network Interface Card: The attachment that connects a device to a network. The
NIC, usually a PC expansion board, executes the code needed by the connected
device to share a cable or some other media with other stations.
N-ISDN
Narrowband Integrated Services Digital Network: Services include basic rate
interface (2B+D or BRI) and primary rate interface (23B+D or PRI). Supports
narrowband speeds at/or below 1.5 Mbps.
NM
Network Management Entity: The body of software in a switching system that
provides the ability to manage the PNNI protocol. NM interacts with the PNNI
protocol through the MIB.
Nrm
An ABR service parameter, Nrm is the maximum number of cells a source may
send for each forward RM-cell.
