Polycom VIEWSTATION Training Manual page 37

End-User Training Guide: ViewStation
E1
– High speed 2.048 mbps digital line with 32 channels, each operating at
64 kbps. E1 is only available outside the U.S.A.
Encryption
– Alteration of transmitting information to protect it from
unauthorized tapping.
FCIF or (CIF)
– Full Common Intermediate Format. A video resolution of
352 pixels horizontally and 288 pixels vertically. It is used primarily in higher
bit rate (128 kbps and higher) video conferencing.
Flash Memory
– Memory which occupies little space and does not need
continuous power to be retained.
F.R.A.D.
– Frame Relay Access Device: F.R.A.D. takes the information
streams and multiplexes them on public or private frame relay networks.
Frame Relay
– A packet switched networking technology used for low speed
(T1 – 1.5 mbps and lower) WAN connections. Primarily used to connect a
company's routers on their data network.
For more
information
Frames Per Second (fps)
– Frequency with which video frames appear on
call
a monitor. Broadcast-quality video generally consists of 30 frames per
408-402-9000
second. Full-motion videoconferencing typically offers video in the range of
10 – 15 frames per second. At very low bandwidths, such as 56 or 112 kbps,
the frame rate may be lower.
Full-Duplex Audio
– Audio that allows local and remote conference
participants to speak simultaneously with out losing audio contact. Full-
duplex audio may be provided in a point-to-point or multipoint conference.
Full-Motion
– In compressed video, picture quality that is generally
acceptable to users although not of broadcast quality. Typically full-motion
compressed video provides anywhere from 10 – 30 frames per second
depending on the bandwidth allocated.
Graphics
– Transmission of still images, usually from a video source, but in
some cases PC-generated.
G.711 – 3KHz audio-coding at 64 kbps.
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VSGi - Polycom ViewStation End-user Training Guide