Automatic Gain Control (AGC)

Automatic Gain Control (AGC) automatically detects variations in volume input and adjusts the input level to be within a decibel range that you can specify, in 1 dB increments.

If a conferee’s voice input (one conference leg) is either too quiet or too loud, AGC adjusts the input so that it falls within your specified acceptable range.

Default = Disabled

See Automatic Gain Control.

NOTE: You can implement the Manual Volume Control feature to override the dB of a conferee using the 0x068B Input Gain Control TLV.

See Manual Input Volume Control.

0x060C Automatic Gain Control Enable

0x060E Automatic Gain Control Parameters

0x060D Automatic Gain Control Input Level

0x068B Input Gain Control

Noise Gating

During natural breaks in conversation (when the speaker on a channel is not speaking) if significant ambient noise is coming into a conference from the speaker’s line, that noise can be gated using the Noise Gating feature. As a conference grows in size, ambient noise is more likely to become a problem.

You can customize the time span (time constant) over which noise is measured, in increments of 5 ms. You can also specify a maximum allowable estimated noise level in 1 dBm increments, from –54 dBm to –10 dBm.

Defaults
Disabled
Time Constant = 35
Maximum Noise Level = -20 (1 dBm steps)
Noise Gating Sensitivity = 3

See Noise Gating

Noise Gate Enable TLV (0x0608)

Noise Gate Parameters TLV (0x0609)

Output Gain Control

You can adjust gain from –40dB to +10dB, in increments of 1dB.

The Excel platform acts upon the most recent command. For example, if a change is made at the conference leg level and then at the conference level, the conference level setting overrides the leg level setting because that was the last change made.

Default = 0db

See Output Gain Control.

Output Gain Control (0x0607)

Echo Suppression

If a conference leg is generating echoed signal, you can mute that echoed signal using the Echo Suppression feature. Note how this differs from echo cancellation. Echo Suppression adaptively measures the reflected signal input, and adapts its echo estimate up to a maximum noise value, which you can select in 1 dBm increments, from –54 dBm to –10 dBm.

Defaults
Disabled
Echo Return Loss (1 db steps) = -10

See Echo Suppression

Echo Suppression Enable (0x060A)

Echo Suppression Parameters TLV (0x060B)

Conference Failure Behavior

You can configure a conference so that if the conference fails all the channels are parked.

The application is responsible for rebuilding the conference on another DSP resource or for releasing the conference legs.

Default = Purged

0x060F Conference Failure Behavior