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Specifications 5-9
VisuaLink 128/384 General Description
Multi-Point Conference Control
Multi-Point Conference Modes:
•Audio Switch
• Chairman mode (Video selection, local room transmission,
multiple address, remote camera control, pointer control, still
picture transmission, remote camera switch)
• Selective Receive (Video selection, local room transmission)
Multi-point conference control protocol.
• ITU-T Recommendation H.243 (International Standard Method
using LSD)
• NEC own method (NEC's own method using MLP)
Camera Control
Switching modes:
• VisuaLink Remote Control (Local/remote camera control
(camera switch, pan/tilt/zoom/preset)
• PC software (sold separately) can control a local camera (near
end) and remote camera (far end).
• Speaker detecting. It detects a speaker from the connected
microphones (one of three) and automatically switches to the
stored preset for that speaker.
Selection for camera type:
•VC-C1
•EVI-D30
Remote camera protocol selection:
• ITU-T Recommendation H.281 (International Standard Method
using LSD)
• NEC own method (NEC's own method using MLP)
Maintenance
VisuaLink employs the following maintenance modes:
• VisuaLink firmware can be manually or automatically
downloaded from NEC.
• Loopback diagnosis capability
• Communication log (start date, complete date, duration, fee,
reason for the disconnection) can be recorded and used by a
PC.