Cisco 7975G - Unified IP Phone VoIP Fehlersuche und Wartung - Seite 13

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Cisco 7975G - Unified IP Phone VoIP Fehlersuche und Wartung

Troubleshooting and Maintenance

We recommend that you provide the phone with an Alternate TFTP server setting manually. This setting

allows the phone to download the configuration and other files from TFTP. The phone in a remote location

(home office) cannot correctly provide OPTION 150 to the phone using DHCP.

The IP phone can register to the last-known Cisco Unified Communications Manager, but any configuration

updates cannot applied until you configure the manual TFTP server address.

Procedure

Step 1

On the phone, select Applications.

Step 2

Navigate to the IPv4 Settings window.

Step 3

Scroll to the Alternate TFTP option and set the field to Yes.

Step 4

In the TFTP Server 1 field, set the TFTP server address.

Step 5

Save the changes.

Check TFTP Settings

Procedure

Step 1

You can determine the IP address of the TFTP server used by the phone by pressing the Settings button on

the phone, choosing Network Configuration > IPv4, and scrolling to the TFTP Server 1 option.

Step 2

If you have assigned a static IP address to the phone, you must manually enter a setting for the TFTP Server

1 option. See

Step 3

If you are using DHCP, the phone obtains the address for the TFTP server from the DHCP server. Check the

IP address configured in Option 150.

Step 4

You can also enable the phone to use an alternate TFTP server. Such a setting is particularly useful if the

phone was recently moved from one location to another. See

Check DHCP settings

Procedure

Step 1

On the Cisco Unified IP Phone, press the Settings button, choose Network Configuration, and look at the

following options:

• DHCP Server: If you have assigned a static IP address to the phone, you do not need to enter a value for

• IP Address, Subnet Mask, Default Router: If you have assigned a static IP address to the phone, you

Network Configuration

the DHCP Server option. However, if you are using a DHCP server, this option must have a value. If it

does not, check your IP routing and VLAN configuration. See Troubleshooting Switch Port Problems

at this URL:

http://www.cisco.com/en/US/products/hw/switches/ps708/prod_tech_notes_list.html

must manually enter settings for these options. See

Menu.

Network Configuration Menu

Troubleshooting and Maintenance

Check TFTP Settings

for instructions.