Triple-Play Service Deployment

Glossary
Forward Error Correction A method for protecting the transport stream against error. FEC adds error control
(FEC) bits before RF modulation. With these bits, errors in the transport stream up to
certain limits may be detected and corrected prior to decoding.
Frame Lines of spatial information for a video signal.A generic term for organizing data into
packets, the details specified in the particular technology associated with the term.
FTTB Fiber to the Building
FTTC / FTTK Fiber to the Curb / Kerb
FTTH Fiber to the Home
FTTN Fiber to the Node
FTTO Fiber to the Office
Fusion Splice A permanent joint accomplished by the application of localized heat sufficient to
fuse or melt the ends of the optical fiber together,forming a continuous single fiber.
G Filter A filter established for the analysis of the voice frequency spectrum, typically 20
KHz to 1.1 MHz
G.Lite A lower-speed version of ADSL. It offers the advantage of being an ITU standard.
Gateway A system which does translation from one native format to another.
GMQ General Membership Query. An IGMP message asking the host to respond with all
multicast channels that it wants to join.
GOP Group Of Pictures. A set of pictures, or video frames usually 12-15 frames long, used
for temporal encoding of MPEG-2 video defining the number of frames from one Iframe
to the next.
Graded-Index Fiber Fiber design in which the refractive index of the core is lower toward the outside of
the core and increases toward the center with the peak at the centerline. This
multimode fiber design reduces the time difference between the arrival of different
modes, minimizing modal dispersion and maximizing bandwidth.
Group Index The factor by which the speed of light in vacuum has to be divided to yield the
propagation velocity of light pulses in the fiber.
Groups of Pictures (GOP) Set of pictures, or video frames usually 12-15 frames long, used for temporal encoding
of MPEG-2 video defining the number of frames from one I-frame to the next.
GSQ Group Specific Query. An IGMP message used to learn if a particular group has any
members on an attached network.
HDTV High Definition Television. HDTV’s resolution is approximately twice as high as that
of Standard Definition Television (SDTV) for both horizontal and vertical dimensions.
HDTV has an aspect ratio of 16x9 as compared to the 4x3 aspect ratio of SDTV
HPNA Home Phone Networking Alliance.Organization formed to establish standards for home
networking technology over coax and twisted pair copper phone lines within the home.
Hub A point in a network where circuits are connected. As a device, a Hub connects
circuits with very little intelligence providing a physical bus only and does not set
up routing paths.
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