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Cisco Bug: CSCvt18740 - Loud buzzing noise when pressing speaker/Class-D Amplifier Damage Issue

Last Modified

Jun 08, 2020

Products (1)

  • Cisco IP Phone 7800 Series with Multiplatform Firmware

Known Affected Releases

11.3(1)

Description (partial)

Symptom:
After Upgrade 78XX to Firmware 11.2.3, may cause permanent damage to speaker due to Class D Amplifier damage issue.

Impacted phone models:
7811, 7821, 7841, 7861,6841,6861,6871,6851

Conditions:
Firmware version 11.2.3
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Bug Details Include

  • Full Description (including symptoms, conditions and workarounds)
  • Status
  • Severity
  • Known Fixed Releases
  • Related Community Discussions
  • Number of Related Support Cases
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