Cisco 7920 Administration Guide - Page 191

Chapter 9 Troubleshooting the Cisco Wireless IP Phone 7920 Resolving Voice Quality and Roaming Problems Resolving Voice Quality and Roaming Problems Cisco Wireless IP Phone 7920 users might have problems with voice quality and connectivity when roaming with their phones. See the following sections for troubleshooting information: • Symptom: Cisco Wireless IP Phone Resets Unexpectedly, page 9-11 • Symptom: The Cisco Wireless IP Phone Has Audio Problems, page 9-14 • Symptom: The Cisco Wireless IP Phone Does Not Roam Properly, page 9-15 Symptom: Cisco Wireless IP Phone Resets Unexpectedly If users report that their phones are resetting during calls or resetting while idle on their desk, you should investigate the cause. If the network connection and Cisco CallManager connection are stable, a Cisco Wireless IP Phone 7920 should not reset on its own. Typically, a phone resets if it has problems connecting to the access point and LAN or to Cisco CallManager. These sections can help you identify the cause of a phone resetting in your network: • Verifying Access Point Settings, page 9-11 • Identifying Intermittent Network Outages, page 9-12 • Verifying DHCP Settings, page 9-12 • Verifying Voice VLAN Configuration, page 9-12 • Verifying that the Phones Have Not Been Intentionally Reset, page 9-13 • Eliminating DNS or Other Connectivity Errors, page 9-13 Verifying Access Point Settings Verify that the wireless configuration is correct. For example, check if the particular access point or switch to which the phone is connected is down. See the "Wireless Network and Access Point Configuration" section on page 2-19 for information about access point settings. OL-7104-01 Cisco Wireless IP Phone 7920 Administration Guide for Cisco CallManager Release 4.0 and 4.1 9-11