Phone Troubleshooting; General Troubleshooting Information - Cisco 8832 Administration Manual

Phone Troubleshooting

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General Troubleshooting Information

The following table provides general troubleshooting information for the Cisco IP Phone.
Table 26: Cisco IP Phone Troubleshooting
Summary
Prolonged broadcast storms cause IP phones to reset,
or be unable to make or answer a call
General Troubleshooting Information, on page 157
Startup Problems, on page 159
Phone Reset Problems, on page 163
Phone Cannot Connect to LAN, on page 165
Cisco IP Phone Security Problems, on page 165
Audio Problems, on page 167
General Telephone Call Problems, on page 168
Troubleshooting Procedures, on page 169
Control Debug Information from Cisco Unified Communications Manager, on page 172
Additional Troubleshooting Information, on page 173
Cisco IP Conference Phone 8832 Administration Guide for Cisco Unified Communications Manager
12
C H A P T E R
Explanation
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.
157