Audio Features
136
60
-60
Default
20
Web UI
Handset & Account > Handset Registration > Add Handset/Edit > PTime (ms)
[1]
X is the account ID. X=1-100.
Early Media
The early media refers to the media (for example, audio and video) played to the caller before a SIP call is actually
established.
Topic
Early Media Configuration
The following table lists the parameters you can use to configure the early media.
Parameter
phone_setting.is_deal180
<y0000000000xx>.cfg
Description
It enables or disables the phone to deal with the 180 SIP message received after the 183 SIP mes-
sage.
Permitted
Values
0
-Disabled
1
-Enabled, the phone will resume and play the local ringback tone upon a subsequent 180 message
received.
Default
1
Web UI
Features > General Information > 180 Ring Workaround
[1]
If you change this parameter, the phone will reboot to make the change take effect.
Acoustic Clarity Technology
To optimize the audio quality in your network, Yealink phones support the acoustic clarity technology: Background
Noise Suppression (BNS), Automatic Gain Control (AGC), Voice Activity Detection (VAD), Comfort Noise Gen-
eration (CNG) and jitter buffer.
Topics
Background Noise Suppression (BNS)
Automatic Gain Control (AGC)
Voice Activity Detection (VAD)
Comfort Noise Generation (CNG)
Jitter Buffer
Background Noise Suppression (BNS)
Background noise suppression (BNS) is designed primarily for hands-free operation and reduces background
noise to enhance communication in noisy environments.
Automatic Gain Control (AGC)
Automatic Gain Control (AGC) is applicable to the hands-free operation and is used to keep audio output at nearly
a constant level by adjusting the gain of signals in some circumstances. This increases the effective user-phone
radius and helps with the intelligibility of soft-talkers.
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