Agilent Technologies J3972A - Manual (Page 168)

148
Network Element (NE)
A hardware device for handling signals. See also Multiplexer.
Network Equipment
A collection of bridges, routers and switches which comprise the network
infrastructure.
Network to Network Interface (NNI)
The Network to Network interface (or Network to Node Interface) is similar to the
UNI but there is no 4-bit GFC field. The 4 extra bits are used as part of the VPI.
Nibble
A nibble is four bits.
NNI
Network to Network interface (or Network to Node Interface)
Node
A computer or other addressable device on a network, including PCs, terminals,
probes, routers, and mainframes. Usually, a node has a station address.
Object
Any device that can be monitored or controlled by use of the SNMP protocol.
OC-3 (Optical Carrier level-3)
The optical derivation of STS-3. The SONET standard for OC-1 or STS-1 has a
basic rate of 51.84 Mbps. See also STS.
Open Systems Interconnection (OSI)
Open Systems Interconnection is the internationally accepted standard for
communications between different systems by different manufacturers. Most
commonly known as the OSI Model - the 7-layer network architecture.
Operations, Administration and Maintenance (OAM)
OAM is a cell type dedicated to carrying administrative information for the
network.