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 Cisco IP Phone received a command from Cisco Unified Communications Manager to
reset by pressing Applications on the phone and choosing Admin settings > Status > Network statistics.
•
If the Restart Cause field displays Reset-Reset, the phone receives a Reset/Reset from Cisco Unified
Communications Manager Administration.
•
If the Restart Cause field displays Reset-Restart, the phone closed because it received a Reset/Restart
from Cisco Unified Communications Manager Administration.
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 250.
Phone Does Not Power Up
Problem
The phone does not appear to be powered up.
Cisco IP Phone 8800 Series Administration Guide for Cisco Unified Communications Manager
244
Phone Reset Problems
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