Troubleshooting and Maintenance• Troubleshooting and Maintenance Overview, on page 1• Troubleshooting, on page 1• Maintenance, on page 22Troubleshooting and Maintenance OverviewThis chapter provides information that can assist you in troubleshooting problems with your Cisco UnifiedIP Phone or with your IP telephony network. It also explains how to clean and maintain your phone.For additional troubleshooting information, see the Using the 79xx Status Information For Troubleshootingtech note. This document is available to registered Cisco.com users at this URL:http://www.cisco.com/en/US/products/hw/phones/ps379/products_tech_note09186a00800945bd.shtmlTroubleshootingThis section includes the following topics:Startup ProblemsAfter installing a Cisco Unified IP Phone into your network and adding it to Cisco Unified CommunicationsManager, the phone should start up as described in Phone Startup Process. If the phone does not start upproperly, see the following sections for troubleshooting information:Cisco Unified IP Phone Does Not Go Through Normal Startup ProcessProblemWhen you connect a Cisco Unified IP Phone into the network port, the phone should go through the normalstartup process, and the LCD screen should display information.CauseIf the phone does not go through the startup process, the cause may be faulty cables, bad connections, networkoutages, or lack of power. Or, the phone may not be functional.Troubleshooting and Maintenance1