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Administrator Guide

HUAWEI IP Phone 7920 and 7960 V600R006C00

Describes the deployment, configuration, and maintenance of HUAWEI IP Phone 7920/7960.

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Media

Media

This section describes how to set protocol parameters used for calls and conferences.

  1. Access the phone web page as an administrator. For details, see Web Page Access.
  2. Choose Advanced > Media.

    The page shown in Figure 6-7 is displayed.

    Figure 6-7 Media

  3. Set parameters (see Table 6-13 for detailed parameter descriptions).

    Table 6-13 Parameter description

    Parameter

    Description

    How to Set

    How to Modify the Configuration File

    DTMF Transmission Mode

    Specifies the Dual Tone Multiple Frequency (DTMF) transmission mode. Two options are available:

    • INBAND: In this mode, DTMF signals are transmitted in audio signals. This mode is not reliable for codecs at low bit rates.
    • RFC2833: In RFC2833 mode (out-of-band mode), DTMF signals are transmitted using RTP. TeleponeEvent, a special rtpPayloadType, is used to specify the RFC2833 data packet.

    Set this parameter based on your network environment.

    Default: RFC2833

    Parameter: DTMFTransferMode

    Location: Device > ComCfg > Media

    Value: 0 or 1

    • 0: inband
    • 1: RFC2833

    Example: DTMFTransferMode="1"

    DTMF Payload

    Indicates the payload of an RFC2833 packet for DTMF transmission.

    Value range: 96-126

    Default: 101

    Parameter: DTMFEfectLoadvalue

    Location: Device > ComCfg > Media

    Example: DTMFEfectLoadvalue="101"

    Anonymize DTMF Number

    Whether to anonymize DTMF numbers. If this parameter is set to Enable, DTMF numbers are displayed in ciphertext.

    Value: 0 or 1

    • 0: DTMF numbers are not anonymized.
    • 1: DTMF numbers are anonymized.

    Default: Enable

    Parameter: DTMFHideEnable

    Location: Device > ComCfg > System

    Example: DTMFHideEnable="1"

    iLBC Payload

    Indicates the payload for the iLBC codec.

    Value range: 96-126

    Default: 97

    Parameter: ILBCEfectLoadvalue

    Location: Device > ComCfg > Media

    Example: ILBCEfectLoadvalue="97"

    G.722.2 Payload

    Indicates the payload for the G.722.2 codec.

    Value range: 96-126

    Default: 100

    Parameter: G7222PayloadType

    Location: Device > ComCfg > Media

    Example: G7222PayloadType="100"

    G.722.1 Payload

    Indicates the payload for the G.722.1 codec.

    Value range: 96-126

    Default: 99

    Parameter: G7221PayloadType

    Location: Device > ComCfg > Media

    Example: G7221PayloadType="99"

    Opus Payload

    Indicates the payload for the Opus codec.

    Value range: 96-126

    Default: 112

    Parameter: OpusPayloadType

    Location: Device > ComCfg > Media

    Example: OpusPayloadType="112"

    Ptime

    Indicates the packetization duration of the voice codec. For detail, see Table 6-14.

    Set this parameter based on your network environment.

    Default: 20ms

    Parameter: Ptime

    Location: Device > ComCfg > Media

    Example: Ptime="20"

    Net-ATE

    Indicates whether to enable the function of using redundancy transmission to adjust the packetization duration or transmission rate of voice media streams to reduce the packet loss rate and improve the VoIP quality according to the varied network conditions.

    Set this parameter based on your network environment.

    Default: Enable

    Parameter: NetATE

    Location: Device > ComCfg > Media

    Value: 0 or 1

    • 0: disable
    • 1: enable

    Default: 1

    Example: NetATE="1"

    Noise Suppression

    Indicates whether to enable noise suppression. After noise suppression is enabled, the IP phone suppresses noise in the collected audio.

    NOTE:

    A greater noise suppression effect results in lower voice quality.

    Set this parameter based on your network environment.

    Default: Enable

    Parameter: NoiseRestrain

    Location: Device > ComCfg > Media > SwitchInfo

    Value: 0 or 1

    • 0: disable
    • 1: enable

    Default: 1

    Example: NoiseRestrain="1"

    Echo Cancellation

    Indicates whether to enable echo cancellation. After echo cancellation is enabled, the IP phone conceals the acoustic echoes that occur in the microphone to minimize the effects of the local audio card shift.

    Set this parameter based on your network environment.

    Default: Enable

    Parameter: EchoCancellation

    Location: Device > ComCfg > Media > SwitchInfo

    Value: 0 or 1

    • 0: disable
    • 1: enable

    Default: 1

    Example: EchoCancellation="1"

    Voice Activity Detection

    Indicates whether to enable Voice Activity Detection (VAD). VAD helps conserve bandwidth resources during audio calls.

    Set this parameter based on your network environment.

    Default: Disable

    Parameter: SilenceDetection

    Location: Device > ComCfg > Media > SwitchInfo

    Value: 0 or 1

    • 0: disable
    • 1: enable

    Default: 0

    Example: SilenceDetection="0"

    Automatic Gain Control

    Indicates whether to enable Automatic Gain Control (AGC).

    • With AGC enabled, the IP phone automatically adjusts the volume and level to deliver optimal audio experience.
    • The database engine provides interfaces for enabling or disabling AGC and for querying the AGC status.
    • The phone uses digital AGC (adjusting the PCM waveform again) to achieve automatic gain control.

    Set this parameter based on your network environment.

    Default: Disable

    Parameter: AutomaticGain

    Location: Device > ComCfg > Media > SwitchInfo

    Value: 0 or 1

    • 0: disable
    • 1: enable

    Default: 0

    Example: AutomaticGain="0"

    RTP Port

    Defines the port range for the IP phone to send and receive RTP packets. The IP phone selects a port within that port range to send and receive RTP packets.

    Value range: 1024-65535

    Default value for Min. RTP Port: 10000

    Default value for Max. RTP Port: 10100

    Parameters: LOCALPORTMIN and LOCALPORTMAX

    Location: Device > ComCfg > Media > Rtp

    Setting:

    • Set LOCALPORTMIN to the minimum RTP port number.
    • Set LOCALPORTMAX to the maximum RTP port number.

    Example: LOCALPORTMIN="10000" and LOCALPORTMAX="10100"

    Encoding

    Indicates the voice codec. The IP phone supports the following voice codecs: G.711a, G.711μ, G.729AB, G.722, iLBC, G.722.1, G.722.2, and Opus.

    Select the voice codecs that you want to use, and in the Rearrange column, click the Up or Down arrow button to adjust the codec priority.

    Parameters: AudioCapEnable and AudioCap

    Location: Device > ComCfg > Media

    Setting:

    • AudioCapEnable indicates the voice codec switch. To enable a codec, set this parameter to 1. To disable a codec, set this parameter to 0.
    • AudioCap indicates the voice codec priority.

      The value ranges from 1 to 65535. A larger value indicates a lower priority.

    Example: G711AENABLE="1" and G711APRIORITY="1" (indicating that G.711a is enabled and its priority is highest)

    Table 6-14 Packetization durations of the voice codec

    Codec

    Packetization Duration

    G.711 A/U

    10ms/20ms/30ms

    G.729 AB

    10ms/20ms/30ms

    iLBC

    20ms/30ms

    G.722

    10ms/20ms/30ms

    Opus 16k

    20ms/40ms/60ms

    G.722.1

    20ms/40ms

    G.722.2

    20ms/40ms

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Updated: 2019-03-06

Document ID: EDOC1100036652

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