Cisco 7942G - Unified IP Phone VoIP Fehlersuche und Wartung - Seite 16

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Cisco 7942G - Unified IP Phone VoIP Fehlersuche und Wartung

Determine DNS or Connectivity Issues

Procedure

Step 1

From Cisco Unified Communications Manager, choose Device > Phone > Find to locate the phone experiencing

problems.

Step 2

Choose Delete to remove the phone from the Cisco Unified Communications Manager database.

Step 3

Add the phone back to the Cisco Unified Communications Manager database. See

Communications Manager Phone Addition Methods

Step 4

Power cycle the phone.

Determine DNS or Connectivity Issues

If the phone continues to reset, follow these steps to eliminate DNS or other connectivity errors:

Procedure

Step 1

Use Erase to reset phone settings to their default values. See

page 21

Step 2

Modify DHCP and IP settings:

a) Disable DHCP. See

b) Assign static IP values to the phone. See

default router setting used for other functioning Cisco Unified IP Phones.

c) Assign a TFTP server. See

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 > Find and verify that you have

assigned the correct MAC address to this Cisco Unified IP Phone. For information about determining a MAC

address, see

Step 6

Power cycle the phone.

General Troubleshooting Information

The following table provides general troubleshooting information for the Cisco Unified IP Phone.

Troubleshooting and Maintenance

for details.

Network Configuration Menu

Cisco Unified IP Phone MAC Address

for details.

Cisco Unified IP Phone Reset or Restore, on

for instructions.

Network Configuration Menu

for instructions. Use the same TFTP server used

Determination.

Troubleshooting and Maintenance

Cisco Unified

for instructions. Use the same