Cisco 8961 Administration Manual page 304
Unified communications manager 10.0 sip
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Camera, audio, and video problems
Solution
When the resolution of the received video is grainy, the user may perceive that the video quality is poor.
However, this does not cause video distortion or artifacts.
• Check the Cisco Unified Communications Manager bandwidth settings under Region settings.
• Check the Receiver Resolution in video statistics. This may be an issue if the Cisco Unified
Communications Manager bandwidth setting limits the resolution to less than CIF, (352x288). Try
increasing the bandwidth to at least 275 kbps.
Video is blocky or distorted
Problem
The phone has blocky or distorted video.
Cause
Blocky or distorted video is generally a symptom of a degraded network. Endpoints that do not closely adhere
to video transmission standards can also cause blocky or distorted video.
Solution
If the network is degraded, navigate to Administrator Settings > Status > CallStatistics > Video > Video
Statistics and check the following fields:
• Rcvr Lost Packets
• Rcvr Discarded
• Avg Jitter
• Max Jitter
Video is slow moving or jittery
Problem
The phone has slow moving video or jittery video.
Cause
The frame rate of the received video is low.
Solution
Check the rate by navigating to Administrator Settings > Status > CallStatistics > Video > Video Statistics
and checking the Rcvr Frame Rate field. Frame rates of fewer than 15 fps result in slow-moving video.
Cisco Unified IP Phone 8961, 9951, and 9971 Administration Guide for Cisco Unified Communications Manager
10.0 (SIP)
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