Cisco 7920 Administration Guide - Page 183

Chapter 9 Troubleshooting the Cisco Wireless IP Phone 7920 Resolving Startup and Connectivity Problems • Insert a new or fully charged battery in the Cisco Wireless IP Phone that will not start up. • If you are using the battery, try plugging in the external power supply instead. If, after attempting these solutions, the phone still does not start up, contact a Cisco technical support representative for additional assistance. Symptom: The Cisco Wireless IP Phone Does Not Associate with a Cisco Aironet Access Point After the Greeting Message displays, if a phone continues to cycle through messages displaying on the phone screen, the phone is not associating with the access point properly. The phone cannot successfully start up unless it associates and authenticates with an access point. Verifying Access Point Settings The Cisco Wireless IP Phone 7920 must first authenticate and associate with an access point before it can obtain an IP address. The phone follows this start up process with the access point: • Scans for an access point • Associates with an access point • Authenticates using LEAP • Obtains an IP address Check the SSID settings on the access point and on the phone to be sure the SSID matches. Check the authentication type settings on the access point and on the phone to be sure authentication/encryption settings match. Note If the message, "No Service - IP Config Failed," DHCP failed because the encryption between the access point and phone do not match. Cisco Wireless IP Phone 7920 Administration Guide for Cisco CallManager Release 4.0 and 4.1 OL-7104-01 9-3