Cisco 7925G Administration Guide - Page 204

Resolving Voice Quality and Roaming Chapter 10 Troubleshooting the Cisco Unified Wireless IP Phone 7925G Related Topics • Resolving Startup and Connectivity Problems, page 10-1 • Resolving Voice Quality and Roaming, page 10-8 • General Troubleshooting Information, page 10-14 Resolving Voice Quality and Roaming Cisco Unified Wireless IP Phone 7925G users might have problems with voice quality and connectivity when roaming with their phones. See the following sections for troubleshooting information: • Symptom: Cisco Unified Wireless IP Phone Resets Unexpectedly, page 10-8 • Symptom: Audio Problems, page 10-10 • Symptom: Improper Roaming and Voice Quality or Lost Connection, page 10-11 • Monitoring the Voice Quality of Calls, page 10-12 Symptom: Cisco Unified 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 Unified Communications Manager connection are stable, a Cisco Unified Wireless IP Phone 7925G should not reset on its own. Typically, a phone resets if it has problems connecting to the access point and LAN or to Cisco Unified Communications Manager. These sections can help you identify the cause of a phone resetting in your network: • Verifying Access Point Settings, page 10-8 • Identifying Intermittent Network Outages, page 10-8 • Verifying DHCP Settings, page 10-9 • Verifying Voice VLAN Configuration, page 10-9 • Verifying that the Phones Have Not Been Intentionally Reset, page 10-9 • Eliminating DNS or Other Connectivity Errors, page 10-9 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 "VoIP WLAN Configuration" section on page 2-21 for information about access point settings. Identifying Intermittent Network Outages Intermittent network outages affect data and voice traffic differently. Your network might have been experiencing intermittent outages without detection. If so, data traffic can resend lost packets and verify that packets are received and transmitted. However, voice traffic cannot recapture lost packets. The phone can retransmit and attempt to recover, or if the phone reaches the maximum retransmit rate, it drops the packets or loses association with the access point. 10-8 Cisco Unified Wireless IP Phone 7925G Administration Guide for Cisco Unified Communications Manager 7.0(1) OL-15984-01