Cisco GS7000 Installation And Configuration Manual page 86

Glossary
MIB
management information base. SNMP collects management information from devices on the
network and records the information in a management information base. The MIB
information includes device features, data throughput statistics, traffic overloads, and errors.
N
Nm
Newton meter. A measure of torque defined by the application of one Newton of force on a
lever at a point on the lever that is one meter from the pivot point. (1 Nm = 0.737561 ft-lb)
O
OIB
optical interface board.
OID
object identifier.
OPSW
optical switch.
P
PCB
printed circuit board.
PROM
programmable read-only memory. A memory chip on which data can be written only once.
Once data has been written onto a PROM, it cannot be written to again.
PWB
printed wiring board.
Q
QAM
quadrature amplitude modulation. An amplitude and phase modulation technique for
representing digital information and transmitting that data with minimal bandwidth. Both
phase and amplitude of carrier waves are altered to represent the binary code. By
manipulating two factors, more discrete digital states are possible and therefore larger binary
schemes can be represented.
R
RCVR
receiver.
72 OL-29937-01