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Cisco IP Phone Administration Guide for Cisco CallManager 3.2, Cisco IP Phones 7960/7940/7910
78-10453-04
Chapter 7      Troubleshooting the Cisco IP Phone
Obtaining Status, Model, and Version Information
DHCP timeout DHCP server did not respond. • Network is busy—the errors should 
resolve themselves when the network 
load reduces. 
• No network connectivity between the 
DHCP server and the phone—verify the 
network connections.
• DHCP server is down—check 
configuration of DHCP server. 
• Errors persist—consider assigning a 
static IP address. Refer to the 
“Configuring IP Settings” section on 
page 5-14 for details on assigning a static 
IP address.
DNS timeout DNS server did not respond.
• Network is busy—the errors should 
resolve themselves when the network 
load reduces. 
• No network connectivity between the 
DNS server and the phone—verify the 
network connections.
• DNS server is down—check 
configuration of DNS server. 
DNS unknown host DNS could not resolve the 
name of the TFTP server or 
Cisco CallManager.
• Verify the host names of the TFTP server 
or Cisco CallManager are configured 
properly in DNS. 
• Consider using IP addresses rather than 
host names.
Duplicate IP Another device is using the IP 
address assigned to the phone.
• If the phone has a static IP address, verify 
that you have not assigned a duplicate IP 
address. Refer to the “Assigning an IP 
Address” section on page 5-14 section for 
details
• If you are using DHCP, check the DHCP 
server configuration.
Table 7-1 Status Messages (continued)
Message Explanation Possible Explanation and Action