Cisco 8821 Troubleshooting Manual

Also see for 8821: Guide Administration guide User guide Accessory guide User guide

Cisco 8821 Wireless Phone TroubleshootingContentsIntroductionMicrophone AudioProcedureFor phones running firmware versions 11.0(5) and laterFor phones running firmware versions prior to 11.0(5)VerificationPhone Will Not Power On (Boot)ProcedureVerificationPhone Will Not ChargeProcedureVerificationMIC (Manufacturer Installed Certificate) Not InstalledProcedureVerificationIntroductionThis article describes how to confirm the functionality of different components of the Cisco 8821wireless phone.Microphone Audio(CSCve15706 )Certain phone covers or cases have been found to cause or contribute to microphone failures withthe Cisco 8821 phone. Please discontinue using phone covers or cases to prevent damage to themicrophone. External documentation can be found here - Cisco Wireless IP Phone 8821 Supportfor Third-Party Cases and Covers.There may be a need to confirm the functionality of the Cisco 8821 wireless phone microphonewhile investigating a one way or no way audio situation.ProcedureFor phones running firmware versions 11.0(5) and laterThe 11.0(5) release includes Audio Diagnostics support to help triage current hardware todetermine if the microphone, handset speaker, or handsfree speaker are faulty or not.Step 1. Audio Diagnostics can be accessed at Settings > Admin settings > Diagnostics >Audio.

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