Cisco Systems 8841 Manual De Usuario
Solution
Isolating the phones on a separate auxiliary VLAN increases the quality of the voice traffic.
Phone Resets 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.
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 Administrator Settings > Status > Network
Statistics.
reset by pressing Applications on the phone and choosing Administrator 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 259
.
Phone Does Not Power Up
Problem
The phone does not appear to be powered up.
Solution
In most cases, a phone restarts if it powers up by using external power but loses that connection and switches
to PoE. Similarly, a phone may restart if it powers up by using PoE and then connects to an external power
supply.
to PoE. Similarly, a phone may restart if it powers up by using PoE and then connects to an external power
supply.
Cisco IP Phone 8811, 8841, 8851, and 8861 Administration Guide for Cisco Unified Communications Manager
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Cisco IP Phone Reset Problems