Cisco 7985G Administration Guide - Page 121

Chapter 9 Troubleshooting and Maintenance Resolving Startup Problems Note • When you remove a phone from the Cisco Unified CallManager database, its configuration file gets deleted from the Cisco Unified CallManager TFTP server. The phone directory number or numbers remain in the Cisco Unified CallManager database. You can use these "unassigned DNs" for other devices. If other devices are not using these unassigned DNs, delete them from the Cisco Unified CallManager database. You can use the Route Plan Report to view and delete unassigned reference numbers. Refer to Cisco Unified CallManager Administration Guide for more information. • Changing the buttons on a phone button template, or assigning a different phone button template to a phone, may result in directory numbers that are no longer accessible from the phone. The directory numbers remain assigned to the phone in the Cisco Unified CallManager database, but no button exists on the phone with which calls can be answered. Remove these directory numbers from the phone and delete them if necessary. Symptom: Cisco Unified IP Video Phone Resets Unexpectedly If users report that their phones are resetting during calls or while idle on their desk, you should investigate the cause. If the network connection and Cisco Unified CallManager connection are stable, a Cisco Unified IP Video Phone should not reset on its own. Typically, a phone resets if it has problems connecting to the Ethernet network or to Cisco Unified CallManager. These sections can help you identify the cause of a resetting phone in your network: • Verifying Physical Connection, page 9-9 • Identifying Intermittent Network Outages, page 9-9 • Verifying DHCP Settings, page 9-9 • Checking Static IP Address Settings, page 9-9 • Verifying Voice VLAN Configuration, page 9-10 • Eliminating DNS or Other Connectivity Errors, page 9-10 OL-8726-02 Cisco Unified IP Video Phone 7985G Administration Guide 9-8