Noise on mute

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Jan 15th, 2008
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Hi Guys,

I am experiencing a problem where if users receive an external call from the pstn, and the caller presses the mute button, i get a start/stop noise/interference on my phone.This is particularly audible when on speakerphone.Any help or suggestions will do to point me in the right direction.

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Rob Huffman Tue, 01/15/2008 - 09:12
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Hi Bruce,

This is likely a Phone Firmware issue. Can you send the Phone model and current Firmware they are running.



Steellllllllll0 Wed, 01/16/2008 - 08:54
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Hi Rob,

7970 are @ present SCCP70.8-0-4SR3S

7936 are @ present CMTERM_7936.3-3-8-0

Done a bit more fact finding and what we found is that if for example i make a call from my cisco handset out to my mobile phone, answer the call and then perhaps block the mouthpiece of my mobile so there is silence, then thats when i get the start/stop noise. Sounds like white noise. Could it be a QOS or VAD related problem ??

thanks again !


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