Cisco 8821 문제 해결

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Cisco 8821 Wireless Phone Troubleshooting

Contents

Introduction

Microphone Audio

Procedure

For phones running firmware versions 11.0(5) and later

For phones running firmware versions prior to 11.0(5)

Verification

Phone Will Not Power On (Boot)

Procedure

Verification

Phone Will Not Charge

Procedure

Verification

MIC (Manufacturer Installed Certificate) Not Installed

Procedure

Verification

Introduction

This article describes how to confirm the functionality of different components of the Cisco 8821

wireless phone.

Microphone Audio

(CSCve15706 )

Certain phone covers or cases have been found to cause or contribute to microphone failures with

the Cisco 8821 phone. Please discontinue using phone covers or cases to prevent damage to the

microphone. External documentation can be found here -

Cisco Wireless IP Phone 8821 Support

for Third-Party Cases and Covers.

There may be a need to confirm the functionality of the Cisco 8821 wireless phone microphone

while investigating a one way or no way audio situation.

Procedure

For phones running firmware versions 11.0(5) and later

The 11.0(5) release includes Audio Diagnostics support to help triage current hardware to

determine 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.