MERLIN LEGEND Communications System Release 6.1
Feature Reference
555-661-110
Issue 1
August 1998
Applications
Page I-66Videoconferencing
I
NOTE:
For the most complete information about videoconferencing, see the
Data/Video Reference.
In this guide, “Digital Data Calls” on page 200
includes details about how the system functions with 2B data.
Videoconferencing requires PRI, BRI, or T1 Switched 56 digital services for
communications at 56 or 64 kbps (kilobits per second) per channel or B-channel.
Many videoconferencing systems require two channels, for speeds of 112 or
128 kbps.
Basic video system components include the following:
■ Camera
■ Microphone
■ Video codec circuitry that digitizes and compresses audio and video
signals
■ Cables
■ Software
Additional data communication equipment may be built-in or required as separate
components.
Group and desktop videoconferencing systems differ primarily in the capabilities
and sophistication of the equipment and software that they include. The type of
interface
, not whether they designed for groups or individuals, differentiates their
use with the communications system.
Making and receiving voice calls are not supported on telephones included with
videoconferencing systems.
Group Videoconferencing 67
Group videoconferencing enables groups of people in different geographical
locations to meet face to face. Conferees can exchange information, documents,
ideas, and data while employing a variety of visual aids. Visual aids can include
interactive writing and drawing, prepared text and graphic materials, and
prerecorded audio and video material. Improved technology, superior camera
optics, and digital audio signals result in video pictures that are equal to
commercial broadcast quality.
Users start videoconferences from an easy-to-use control console and conduct
the conference as easily as they operate a telephone. No special technical
expertise is required.
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