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Cisco Bug: CSCus95093 - CP3905 - Intermittent Choppy or Low audio volume issues

Last Modified

Nov 28, 2017

Products (11)

  • Cisco Unified IP Phone 6900 Series
  • Cisco Unified SIP Phone 3905
  • Cisco Unified IP Phone 9951
  • Cisco Unified IP Phone 6961
  • Cisco Unified IP Phone 6941
  • Cisco Unified IP Phone 8961
  • Cisco Unified IP Phone 8941
  • Cisco Unified IP Phone 9971
  • Cisco Unified IP Phone 8945
  • Cisco Unified IP Phone 6945
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Known Affected Releases


Description (partial)

Intermittent Choppy or Low audio volume issue is observed with CP-3905 Phones. Audio from phone (in Tx direction) will be Choppy or Low when there is significant background noise.
Root cause of the issue is identified  to be with "Noise Canceller" functionality on phone when processing audio with background noise. Noise suppression results partial attenuation of actual audio.

Issue is observed only when there is significant background noise. High chances of occurrence in speaker phone mode.
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Bug Details Include

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