Authentication Error, Phone Cannot Authenticate CTL File 309
Phone Cannot Authenticate CTL File 309
CTL File Authenticates but Other Configuration Files Do Not Authenticate 310
ITL File Authenticates but Other Configuration Files Do Not Authenticate 310
TFTP Authorization Fails 310
Phone Does Not Register 310
Signed Configuration Files Are Not Requested 311
802.1X Authentication Problems 311
802.1X Enabled on Phone but Phone Does Not Authenticate 312
802.1X Not Enabled 312
Factory Reset of Phone Has Deleted 802.1X Shared Secret 313
Camera, Audio, and Video Problems 313
No Video 313
Phone Display Is Wavy 314
Video Freezes 314
Video Is Too Dark 314
Video Is Poor Quality or Grainy 315
Video Is Blocky or Distorted 315
Video Is Slow Moving or Jittery 315
Audio/Video Is Not Synchronized 316
No Audio 316
No Speech Path 316
Choppy Speech 317
Poor Audio Quality with Calls that Route Outside Cisco Unified Communications
Manager 317
Video Distorted or Pixilated 317
VXC VPN Troubleshooting 318
Phone Does Not Set Up VXC VPN Tunnel 318
Phone Does Not Connect with VXC VPN 318
General Telephone Call Problems 319
VPN-Connected Phone Does Not Log Calls 319
Phone Call Cannot Be Established 319
Phone Does Not Recognize DTMF Digits or Digits Are Delayed 320
Troubleshooting Procedures 320
Set Up Remote Phone 320
Cisco Unified IP Phone 8961, 9951, and 9971 Administration Guide for Cisco Unified Communications Manager 10.0
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