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| * IP111 with V11r1 and above | | * IP111 with V11r1 and above |
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| ==Problem==
| | Tweaking internal gains in the audio processing chain of the IP111 is considered harmful because it assumes a fixed implementation. But the implementation cannot be kept static and may need changes at any time. Therefore support for these parameters is ceased. Please open a support ticket if your environment needs special audio considerations. |
| * Customers might need control over the microphone sensitivity to lower background noise pickup
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| * Customers might need higher speaker volume of handset or loudspeaker than configurable on the phone
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| ==Summary==
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| The microphone sensitivity of the handset can be controlled with a sequence of commands along the lines
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| <nowiki>http://ip-adress-of-the-phone/!config add AC-DSP0 HANDSET /ADC_Gain 21</nowiki>
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| <nowiki>http://ip-adress-of-the-phone/!config activate</nowiki>
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| Presently 21 is the default. Decreasing the value by 4 decreases the sensitivity by 6 dB. The allowed range of the ADC_Gain parameter is 0..31. The same command can be applied for speakerphone mode with name SPEAKER instead of HANDSET.
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| Higher speaker volume can be achieved by a command
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| <nowiki>http://ip-adress-of-the-phone/!config add AC-DSP0 HANDSET /Coder_Output_Gain 34,32,30,28,26,24,22,20,18,16</nowiki>
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| <nowiki>http://ip-adress-of-the-phone/!config activate</nowiki>
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| where each value of the comma separated list (default shown) corresponds to one of the volume steps. Decreasing each by 4 increases the volume by 6 dB. The permitted range of the values is 0..63. The same command can be applied for speakerphone mode with name SPEAKER instead of HANDSET.
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| <span style="color:red">
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| '''To avoid hearing damage, please be careful with the values!''' Increase the values step by step. You hear the difference after the !config activate</span>
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| <span style="color:red">
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| Clipping may occur for high audio levels from the peer if the speaker volume has been increased.
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| </span>
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| If you are satisfied with the settings, type:
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| <nowiki>http://ip-adress-of-the-phone/!config write</nowiki>
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| Now, the values are stored in the config.
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| Please note, that the default values might change without notice in future DSP code updates and also the actual sound pressure corresponsing to these values might change. Please re-evaluate tweaks after firmware update and assert the commands above again.
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| ==Related Articles== | | ==Related Articles== |
Applies To
- IP111 with V11r1 and above
Tweaking internal gains in the audio processing chain of the IP111 is considered harmful because it assumes a fixed implementation. But the implementation cannot be kept static and may need changes at any time. Therefore support for these parameters is ceased. Please open a support ticket if your environment needs special audio considerations.
Related Articles
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Howto:Adjusting_the_volume_parameters_on_IP200A,_IP110,_IP230_and_IP150_in_Version_6_and_later_Firmware