Cisco Prisma II Hybrid Amplifier Installation Manual page 179

SBS
stimulated Brillouin scattering. The easiest fiber nonlinearity to trigger. When a powerful
lightwave travels through a fiber, it interacts with acoustical vibration modes in the glass.
This causes a scattering mechanism to be formed that reflects some of the light back to the
source.
SI
system or service information. Tuning information sent from the DNCS to DHCTs which
provides the information that DHCTs need to be able to tune to a particular service.
SMC
status monitoring and control. The process by which the operation, configuration, and
performance of individual elements in a network or system are monitored and controlled
from a central location.
SNMP
simple network management protocol. A protocol that governs network management and the
monitoring of network devices and their functions.
T
TEC
thermoelectric cooler. A device used to dissipate heat in electronic assemblies.
TNCS
Transmission Network Control System. A Cisco application that allows status monitoring and
control of all transmission equipment located in headends and hubs plus optical nodes,
power supplies, and amplifiers in the outside plant. TNCS provides access to and information
on the entire network in an easy to understand, topology driven, graphical user display.
torque
A force that produces rotation or torsion. Usually expressed in lb-ft (pound-feet) or N-m
(Newton-meters). The application of one pound of force on a lever at a point on the lever that
is one foot from the pivot point would produce 1 lb-ft of torque.
TX
transmit or transmitter.
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