User manual
Table Of Contents
- Table of Contents
- VoicePlus Overview
- Defining Standard Audio Only Conferences and Reservations
- Monitoring On Going Conferences
- General Monitoring
- Participants Queue
- Conference Level Monitoring
- Participant Level Monitoring
- Operations Performed During On Going Conferences
- Management Functions Overview
- Participant Level Operations
- Making Dial-Out Connections
- Changing Participant Connection Types (Dial-In/Dial-Out)
- Disconnecting Participants from Conferences
- Naming Undefined Dial-in Participants
- Changing the Disconnected Participant’s Properties
- Moving a Participant from one Conference to Another
- Designating an Exclusive Speaker
- Changing Participant’s Status to Conference Chairperson
- Designating a VIP Participant
- Adjusting Participant’s Broadcasting and Listening Volume
- Muting and Unmuting Participant’s Audio
- Enabling/Disabling Auto Gain Control (AGC)
- Modifying the Participant’s User Defined Properties
- Conference Level Operations
- Adding New Participants to a Conference
- Muting Dial-In Participants Upon Connection
- Adding Remarks During an On Going Conference
- Locking and Unlocking a Conference
- Managing Question-and-Answer Sessions
- Managing Voting Sessions
- Placing a Conference On Hold
- Modifying Conference General Parameters
- Changing the Conference Duration
- Ending a Conference before its Scheduled Termination Time
- Rescheduling Conference Reservations
- Deleting Recurring Reservations
- Printing Conference Data
- Managing Conferences Using DTMF Codes
- Meeting Rooms and Entry Queues
- IVR and Entry Queue Services
- Attended Conferencing
- Requirements for an Attended Conference
- Defining an Operator Conference
- Setting the Participants Connection to the Conference to Attended Mode
- Participants Queue Management
- Managing Attended Participants from the Browser, Status and Monitor Panes
- Recording
- Appendix A: Glossary
Chapter 4 - Operations Performed During On Going Conferences
4-20
Enabling/Disabling Auto Gain Control (AGC)
Endpoints and phones vary in the types of source noise and volume they
produce. The Auto Gain Control (AGC) mechanism balances noise and
volume of the received audio signals, for conference participants. AGC is
applied to all incoming audio streams before mixing, and dynamically
changes the amplification of the input signal to provide a constant output
amplitude.
The intensity of input signals can vary due to the following factors:
• Microphone properties and adjustments
• Background noise
• Speaker’s distance from microphone
• Speaker’s manner of speech
In some cases, you may need to disable AGC for a participant during a
conference.
You can enable or disable AGC using the participant's right-click menu or in
the Participant Properties dialog box. For more details about participant
properties modifications, see Chapter 2, “Defining Participant Properties” on
page 2-49.
• The AGC option is applicable to all participants using Audio+ resources.
• The AGC option is enabled in the “system.cfg” in the AUDIO PLUS FLAGS
section. By default, the AGC flag is set to YES, and when defining new
participants, the AGC option is selected.