Cisco Unified IP Phone 8941 User Manual

CHAPTER 12
Troubleshooting
•
General Troubleshooting Information, page 165
•
Startup Problems, page 167
•
Phone Reset Problems, page 171
•
Cisco IP Phone Security Problems, page 173
•
Audio and Video Problems , page 177
•
General Telephone Call Problems, page 179
•
Troubleshooting Procedures, page 180
General Troubleshooting Information
The following table provides general troubleshooting information for the Cisco Unified IP Phone.
Table 27: Cisco Unified IP Phone General Troubleshooting
ExplanationSummary
Cisco does not support connecting an IP phone to another IP phone through
the PC port. Each IP phone should directly connect to a switch port. If
phones are connected together in a line (by using the PC port), the phones
will not work.
Connecting a Cisco Unified IP
Phone to another Cisco Unified
IP Phone.
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 Unified IP Phone 8941 and 8945 Administration Guide for Cisco Unified Communications Manager 10.0 (SCCP
and SIP)
165

Cisco Unified IP Phone 8941 Specifications

General

Brand	Cisco
Model	Unified IP Phone 8941
Category	IP Phone
Language	English