Triple-Play Service Deployment

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Glossary
Multiplex (n) A digital stream including one or more services in a single physical channel. (v)—
To sequentially incorporate several data streams into a single data stream in such a
manner that each may later be recovered intact.
Mux Multiplexer
NIT Network Information Table. A DVB table that contains information about a
network’s orbit and transponder; always located on PID 0x0010. DVB specifies two
types of NITs, the NIT Actual and the NIT Other.The NIT Actual is a mandatory table
containing information about the physical parameters of the network actually
being accessed. The NIT Other contains information about the physical parameters
of other networks.The NIT Other is optional
NID Network Interface Device. The demarcation point where the public network ends
and the private network within a home or office begins. All wiring and user devices
inside the premises (such as a modem) are controlled and operated by the owner.
Node A point of flexibility and/or interconnection within the fiber optic cabling system.
NSC Number of Sub-Carriers
NT Network termination
NTR Network Timing Reference
NTSC National TV Standard Committee
Numerical Aperture The number that expresses light gathering capacity of a fiber related to the
acceptance angle. The sine of 5% optical power angle (corresponding to -13 dB) is
used to measure the Numerical Aperture.
NVoD Near Video on Demand.This service allows for a single TV program to be broadcast
simultaneously with a few minutes of difference in starting time. For example, a
movie could be transmitted at 9:00, 9:15 and 9:30.
OAM Operations, Administration and Maintenance
OLR Online Reconfiguration
ONU Optical Network Unit
Optical Loss budget The amount of signal loss that can be tolerated in a system before errors occur.
ORL Optical Return Loss. The ratio (expressed in dB) of the reflected power to the
incident power from a fiber optic system or link ORL = -10 log (Pr/Pi) or ORL = 10
log (Pi/Pr).
OTDR Optical Time Domain Reflectometer. An instrument used to characterize a fiber
optic link. Useful in estimating fiber link attenuation, attenuation coefficient,
discrete reflections, splice/connector loss, and point defects, all as a function of fiber
distance.
P2MP Point-to-Multi-Point
P2P Point-to-Point. A connection established between two specific locations or devices
such as a hub and a workstation or between two buildings.