Phone Does Not Register - Cisco 8811 Administration Manual

Phone Does Not Register

Problem
Phone does not register with Cisco Unified Communications Manager.
Cause
The CTL file does not contain the correct information for the Cisco Unified Communications Manager server.
Solution
Change the Cisco Unified Communications Manager server information in the CTL file.
Signed Configuration Files Are Not Requested
Problem
Phone does not request signed configuration files.
Cause
The CTL file does not contain any TFTP entries with certificates.
Solution
Configure TFTP entries with certificates in the CTL file.
Video Call Problems
No Video Between Two Cisco IP Video Phones
Problem
Video isn't streaming between between two Cisco IP video phones.
Solution
Check to make sure no Media Termination Point (MTP) is being used in the call flow.
Video Stutters or Drops Frames
Problem
When I'm on a video call, the video buffers or drops frames.
Cisco IP Phone 8800 Series Administration Guide for Cisco Unified Communications Manager
Video Call Problems
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