Table of ContentsxiiiCapturing Packets ................................................................................................................... 348Enabling Watch Dog Feature .................................................................................................. 351Getting Information from Status Indicators ............................................................................. 352Analyzing Configuration File ................................................................................................... 352Troubleshooting Solutions ............................................................................................................. 354IP Address Issues..................................................................................................................... 354Audio Issues ............................................................................................................................ 355Upgrading Issues .................................................................................................................... 356Provisioning Issues .................................................................................................................. 358Resetting Issues ...................................................................................................................... 358Rebooting Issues ..................................................................................................................... 359Protocols and Ports Issues ...................................................................................................... 360Display Issues .......................................................................................................................... 362Directory Issues ....................................................................................................................... 362Time and Date Issues .............................................................................................................. 362System Log Issues ................................................................................................................... 362Password Issues ...................................................................................................................... 363Other Issues ............................................................................................................................ 363Appendix ................................................................................365Appendix A: Glossary ..................................................................................................................... 365Appendix B: Time Zones ................................................................................................................. 366Appendix C: Trusted Certificates .................................................................................................... 368Appendix D: SIP (Session Initiation Protocol).................................................................................. 369RFC and Internet Draft Support ............................................................................................... 370SIP Request ............................................................................................................................. 373SIP Header .............................................................................................................................. 374SIP Responses ......................................................................................................................... 375SIP Session Description Protocol (SDP) Usage......................................................................... 378Appendix E: SIP Call Flows .............................................................................................................. 378Successful Call Setup and Disconnect ..................................................................................... 378Unsuccessful Call Setup—Called User is Busy ........................................................................... 381Unsuccessful Call Setup—Called User Does Not Answer .......................................................... 383Successful Call Setup and Call Hold ........................................................................................ 385Successful Call Setup and Call Waiting .................................................................................... 388Call Transfer without Consultation .......................................................................................... 392Call Transfer with Consultation................................................................................................ 395Call Conference ....................................................................................................................... 400Index ......................................................................................405