Phone Resets During Heavy Network Usage; Phone Resets Due To Intentional Reset; Phone Resets Due To Dns Or Other Connectivity Issues; Audio Problems - Cisco 8821 Administration Manual

Phone Resets During Heavy Network Usage

Solution
If the phone is assigned a static IP address, verify that you have entered the correct settings.
Phone Resets During Heavy Network Usage
Problem
If the phone appears to reset during heavy network usage, it is likely that you do not have a voice VLAN
configured.
Solution
Isolating the phones on a separate auxiliary VLAN increases the quality of the voice traffic.

Phone Resets Due to Intentional Reset

Problem
If you are not the only administrator with access to Cisco Unified Communications Manager, you should
verify that no one else has intentionally reset the phones.
Solution
You can check if a wireless phone received a command from Cisco Unified Communications Manager to
reset by accessing the Settings app on the phone and choosing Admin settings > Status > WLAN statistics.
• If the Restart Cause field displays Reset-Reset, the phone receives a Reset/Reset from Cisco Unified
• If the Restart Cause field displays Reset-Restart, the phone closed because it received a Reset/Restart

Phone Resets Due to DNS or Other Connectivity Issues

Problem
The phone reset continues and you suspect DNS or other connectivity issues.
Solution
If the phone continues to reset, eliminate DNS or other connectivity errors by following the procedure in
Determine DNS or Connectivity Issues, on page

Audio Problems

When users report that active phone calls have poor voice quality that includes choppy audio, static or gaps
in audio, or no audio, use the information in this section to identify the cause of the problem.
Cisco Wireless IP Phone 8821 and 8821-EX Administration Guide for Cisco Unified Communications Manager
120
Communications Manager Administration.
from Cisco Unified Communications Manager Administration.
125.
Troubleshooting