Table of Contents
xv
H.235 .......................................................................................................................................................................................... 263
Defending against Attacks ................................................................................................................................................ 265
Abnormal Call Answering ......................................................................................................................................... 265
Configuring Safe Mode Call .................................................................................................................................... 266
System Maintenance .................................................................. 269
Upgrading System Firmware ............................................................................................................................................ 269
Upgrading VCC20 Camera Firmware ............................................................................................................................ 270
Importing/Exporting Configuration .............................................................................................................................. 270
Resetting to Factory ............................................................................................................................................................. 271
SNMP ......................................................................................................................................................................................... 273
Troubleshooting ......................................................................... 277
Troubleshooting Methods ................................................................................................................................................ 277
Viewing Log Files ......................................................................................................................................................... 277
Capturing Packets ........................................................................................................................................................ 280
Getting Information from Status Indicators ..................................................................................................... 283
Analyzing Configuration Files ................................................................................................................................. 284
Viewing Call Statistics ................................................................................................................................................ 284
Using Diagnostic Methods ...................................................................................................................................... 284
Troubleshooting Solutions ................................................................................................................................................ 286
General Issues ............................................................................................................................................................... 286
Camera Issues................................................................................................................................................................ 288
Video & Audio Issues ................................................................................................................................................. 289
Why does the far-site display black screen when local starts a presentation? ................................. 291
System Maintenance .................................................................................................................................................. 292
Appendix..................................................................................... 295
Appendix A: Time Zones .................................................................................................................................................... 295
Appendix B: Trusted Certificates ..................................................................................................................................... 298
Index ........................................................................................... 301
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