C H A P T E R
12
Phone Troubleshooting
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General Troubleshooting Information, on page 157
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Phone Reset Problems, on page 163
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Phone Cannot Connect to LAN, on page 165
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Cisco IP Phone Security Problems, on page 165
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General Telephone Call Problems, on page 168
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Troubleshooting Procedures, on page 169
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Control Debug Information from Cisco Unified Communications Manager, on page 172
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Additional Troubleshooting Information, on page 173
General Troubleshooting Information
The following table provides general troubleshooting information for the Cisco IP Phone.
Table 26: Cisco IP Phone Troubleshooting
Explanation
Summary
A prolonged Layer 2 broadcast storm (lasting several
minutes) on the voice VLAN may cause IP phones to
reset, lose an active call, or be unable to initiate or
answer a call. Phones may not come up until a
broadcast storm ends.
Prolonged broadcast storms cause IP phones to reset,
or be unable to make or answer a call
Cisco IP Conference Phone 8832 Administration Guide for Cisco Unified Communications Manager
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