NetSense's sophisticated algorithm dynamically scans the video stream,
and then reduces or improves the video resolution to maximize quality with
the available bandwidth.
Packet Loss
Packet loss occurs when some of the data transmitted from one endpoint is
not received by the other endpoint. This can be caused by narrow
bandwidth connections or unreliable signal reception on wireless networks.
PaP Video Layout
The PaP (Picture and Picture) view shows up to three images of the same
size.
Phantom Power
Microphones which use phantom power draw their electrical power from the
same cable as the audio signal. For example, if your microphone is
powered by a single cable, it serves both to power the microphone and
transmit the audio data. Microphones which have two cables, one for sound
and a separate power cable, do not use phantom power.
PiP Video Layout
The PiP (Picture In Picture) view shows a video image in the main screen,
with an additional smaller image overlapping in the corner. Typically, a
remote presentation is displayed in the main part of the screen, and the
remote video is in the small image. If the remote endpoint does not show
any content, the display shows the remote video in the main part of the
screen, and the local presentation in the small image.
Point-to-Point
Point-to-point is a feature where only two endpoints communicate with each
other without using MCU resources.
PoP Video Layout
The PoP (Picture out Picture) view shows up to three images of different
size, presented side by side, where the image on the left is larger than the
two smaller images on the right.
Prefix
on page 96.
PTZ Camera
A PTZ camera can pan to swivel horizontally, tilt to move vertically, and
optically zoom to devote all the camera's pixels to one area of the image.
For example, the XT Standard Camera is a PTZ camera with its own power
supply and remote control, and uses powerful lenses to achieve superb
visual quality. In contrast, fixed cameras like webcams only offer digital
PTZ, where the zoom crops the camera image, displaying only a portion of
the original, resulting in fewer pixels of the zoomed image, which effectively
lowers the resolution. Fixed cameras also offer digital pan and tilt only after
zooming, where you can pan up to the width or length of the original
camera image.
Q.931
Q.931 is a telephony protocol used to start and end the connection in H.323
calls.
Glossary
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Avaya Scopia
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XT Series User Guide
April 2015