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A P P E N D I C E S •
APPENDIX D: APPLICATIONS
50
Appendix D:
Applications
Audioconferencing/Videoconferencing
As teleconferencing continues to grow, sophisticated equipment will
make the difference between an average (or even frustrating) meeting
and a high class, perfectly managed meeting. Executives at all levels
appreciate the carefree ease of use that the AP400 provides for confer-
encing.
The benefit derived from using the AP400 in conferencing is its ability to
use multiple, gating microphones. This keeps unused microphones
closed, preventing reverberation and echo. When someone speaks at
the "closed" microphone, it will automatically gate on (if properly pro-
grammed).
When the AP400 is used at multiple sites, and linked through telephone
connections, each site can program its AP400 to accommodate the
type of conference (audioconference and / or videoconference) and
the size of the conference room. The AP400 can be easily pro-
grammed to tailor each system to the application. The program allows
you to specify adaptive ambient mode, ambient level (dBu), constant
gain mode, decay rate, first-mic priority mode, gate ratio (dB), hold time
(tenth of a second), last-mic mode, maximum number of microphones,
off attenuation (dB) and PA adaptive mode.
The AP400 includes a single-line, digital hybrid telephone interface. If
you want multiple telephone lines, you can add AP10 units.
5 W, 4 to 16 Ohm
Speaker Connection
Analog
Telephone
Line
AP400
=
Microphone
Control System
or PC (Optional)
Telephone
Set
Video
CODEC
VCR
3
2
4
1
(Optional)
Tape Player
External Power Amp
Logic Out
Status and
Control
G-Link from
other AP units
G-Link to
other AP units
(Optional)
Figure 31. AP400 Teleconferencing
Application Block Diagram
