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Cisco 7945G - Unified IP Phone VoIP Rozwiązywanie problemów i konserwacja

Verify DNS Settings

Step 2

If you are using DHCP, check the IP addresses distributed by your DHCP server. See Understanding and

Troubleshooting DHCP in Catalyst Switch or Enterprise Networks at this URL:

http://www.cisco.com/en/US/tech/tk648/tk361/technologies_tech_note09186a00800f0804.shtml

Verify DNS Settings

To verify DNS settings, perform these steps.

Procedure

Step 1

Verify this setting by pressing Settings.

Step 2

Choose Network Configuration and scroll to the DNS Server 1 option.

Step 3

Verify that a CNAME entry exists in the DNS server for the TFTP server and for the

Cisco Unified Communications Manager system.

Step 4

Ensure that DNS is configured to do reverse look-ups.

Create New Phone Configuration File

If you continue to have problems with a particular phone that other suggestions in this chapter do not resolve,

the configuration file may be corrupted.

Note

• When you remove a phone from the Cisco Unified Communications Manager database, the configuration

• Changing the buttons on a phone button template, or assigning a different phone button template to a

To create a new configuration file, follow these steps:

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

Troubleshooting and Maintenance

file is deleted from the Cisco Unified Communications Manager TFTP server. The phone directory

number or numbers remain in the Cisco Unified Communications Manager database. They are called

"unassigned DNs" and can be used for other devices. If unassigned DNs are not used by other devices,

delete them from the Cisco Unified Communications Manager database. You can use the Route Plan

Report to view and delete unassigned reference numbers. See the Cisco Unified Communications Manager

Administration Guide for more information.

phone, may result in directory numbers that are no longer accessible from the phone. The directory

numbers are still assigned to the phone in the Cisco Unified Communications Manager database, but the

phone has no button with which calls can be answered. These directory numbers should be removed

from the phone and deleted if necessary.

Troubleshooting and Maintenance

for details.

Cisco Unified