Cisco 7920 Administration Guide - Page 187

Chapter 9 Troubleshooting the Cisco Wireless IP Phone 7920 Resolving Startup and Connectivity Problems 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 or Option 66. Refer to Configuring Windows 2000 DHCP Server for Cisco Call Manager available at this URL: http://www.cisco.com/en/US/customer/products/sw/voicesw/ps556/products_tec h_note09186a00800942f4.shtml You can also enable the phone to use a static TFTP server. Such a setting is particularly useful if the phone was recently moved from one location to another. For information about determining and changing TFTP server settings, see "Configuring TFTP Option" section on page 5-9 or "Viewing the Current Configuration" section on page 8-17. Verifying IP Addressing You should verify the IP addressing for the Cisco Wireless IP Phone 7920. If you are using DHCP, the DHCP server should provide these values. If you have assigned a static IP address to the phone, you must enter these values manually. Note When the Cisco Wireless IP Phone loses the RF signal (goes out of the coverage area), the phone will not release the DHCP server unless it reaches the time-out state. Check for these problems: • DHCP Server-If you have assigned a static IP address to the phone, you do not need to enter a value for the DHCP Server option. If you are using a DHCP server, and the wireless IP phone gets a response from the DHCP server, the information is automatically configured. Refer to Troubleshooting Switch Port Problems, available at this URL: http://www.cisco.com/en/US/products/hw/switches/ps708/products_tech_no te09186a008015bfd6.shtml • IP Address, Subnet Mask, Primary Gateway-If you have assigned a static IP address to the phone, you must configure settings for these options. See the "Configuring Static Settings" section on page 5-6. Cisco Wireless IP Phone 7920 Administration Guide for Cisco CallManager Release 4.0 and 4.1 OL-7104-01 9-7