Cisco Systems 7690 Manual De Usuario

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Chapter 7      Troubleshooting the Cisco IP Phone
Resolving Startup Problems
7-24
Cisco IP Phone Administration Guide for Cisco CallManager 3.2, Cisco IP Phones 7960/7940/7910
78-10453-04
You can check whether a Cisco IP Phone 7960/7940 received a command from 
Cisco CallManager to reset by pressing settings > Status > Network Statistic
on the phone. 
If the phone was recently reset one of these messages appears:
Reset-Reset—phone closed due to receiving a Reset/Reset from 
Cisco CallManager administration.
Reset-Restart—phone closed due to receiving a Reset/Restart from 
Cisco CallManager administration.
Eliminating DNS or Other Connectivity Errors
If the phone continues to reset, follow this procedure.
Procedure
Step 1
Reset the phone to factory defaults. See the 
 for details.
Step 2
Modify DHCP and IP settings.
a.
Disable DHCP. See the 
 for 
details.
b.
Assign static IP values to the phone. See the 
 for details. Use the same default router setting used for 
other functioning Cisco IP Phones.
c.
Assign TFTP server. See the 
 for details. Use the same TFTP server used for other functioning 
Cisco IP Phones.
Step 3
On the Cisco CallManager server, verify that the local host files have the correct 
Cisco CallManager server name mapped to the correct IP address. See the 
Configuring The IP Hosts File on a Windows 2000 CallManager Server on 
Cisco.com: 
http://www.cisco.com/warp/customer/788/AVVID/cm_hosts_file.html
Step 4
From Cisco CallManager, select System > Server and verify that the server is 
being referred to by its IP address and not by its DNS name.
Step 5
From Cisco CallManager, select Device > Phone and verify that you have 
assigned the correct MAC address to this Cisco IP Phone.