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Voice Feature Guide 01

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The Voice Quality Enhanced (VQE) feature applies to voice services in the noisy public areas, such as the roads, docks, scenic spots, and bus stations. Deployment of VQE in these areas can improve the voice quality and user experience. Figure 1-134 shows application scenarios and advantage of the VQE.
Figure 1-134 Application scenarios and advantage of the VQE
The VQE consists of two functions, automatic gain control (AGC) and spectral noise suppression (SNS).
  • AGC: A target gain energy value is configured so that the output gain can be automatically adjusted during the VoIP communication, ensuring that subscriber can still hear voices in a noisy environment. AGC ensures smooth energy adjustment and prevents adverse impact brought by abrupt energy changes.
  • SNS: A target noise suppression value is configured. After detecting that the noise energy value is greater than the target value, AG reduces the noise energy value to enable subscribers to feel comfortable during VoIP communication.


The AG only supports AGC. The VQE feature is configured based on user ports and takes effect for calls initiated after the VQE is enabled.

Updated: 2019-02-22

Document ID: EDOC1100067358

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