9-11
Cisco Unified IP Phone 7970G/7971G-GE Administration Guide for Cisco Unified Communications Manager 6.1
OL-14626-01
Chapter 9 Troubleshooting and Maintenance
Cisco Unified IP Phone Resets Unexpectedly
Eliminating DNS or Other Connectivity Errors
If the phone continues to reset, follow these steps to eliminate DNS or other
connectivity errors:
Procedure
Step 1
Use the
Erase
softkey to reset phone settings to their default values. See the
“Resetting or Restoring the Cisco Unified IP Phone” section on page 9-19
for
details.
Step 2
Modify DHCP and IP settings:
a.
Disable DHCP. See the
“Network Configuration Menu” section on page 4-7
for instructions.
b.
Assign static IP values to the phone. See the
“Network Configuration Menu”
section on page 4-7
for instructions. Use the same default router setting used
for other functioning Cisco Unified IP Phones.
c.
Assign TFTP server. See the
“Network Configuration Menu” section on
page 4-7
for instructions. Use the same TFTP server used for other
functioning Cisco Unified IP Phones.
Step 3
On the Cisco Unified Communications Manager server, verify that the local host
files have the correct Cisco Unified Communications Manager server name
mapped to the correct IP address.
Step 4
From Cisco Unified Communications Manager, choose
System > Server
and
verify that the server is referred to by its IP address and not by its DNS name.
Step 5
From Cisco Unified Communications Manager, choose
Device > Phone
and
verify that you have assigned the correct MAC address to this Cisco Unified IP
Phone. For information about determining a MAC address, see the
“Determining
the MAC Address of a Cisco Unified IP Phone” section on page 2-20
.
Step 6
Power cycle the phone.
Summary of Contents for 7970G - IP Phone VoIP
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