Polycom CX5500, Administrator'S Manual

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Polycom CX5500 Unified Conference Station Administrator’s Guide
1.1.0
Polycom, Inc. 325
Parameter Permitted Values Default
video.camera.sharpness 0 to 6 3
Set sharpness level. The value range is from 0 (Lowest) to 6 (Highest).
<codecs/>
These video codecs include:
●
<profile/>
<profile/>
The table Video Profile Parameters contains settings for a group of low-level video codec parameters. For
most use cases, the default values will be appropriate. Polycom does not recommend changing the
default values unless specifically advised to do so.
Video Profile Parameters
Parameter Permitted Values
video.profile.H261.annexD
1
0 or 1 (default)
Enable or disable Annex D when negotiating video calls.
video.profile.H261.CifMpi
1
1 (default) to 32
Specify the frame rate divider that the phone uses when negotiating CIF resolution for a video call. You can enter
a value between 0-
4. To disable, enter ‘0’. The default frame rate divider is ‘1’.
video.profile.H261.jitterBufferMax
1
(video.profile.H261.jitter Buf 500ms) to
2500ms, default 2000ms
The largest jitter buffer depth to be supported (in milliseconds). Jitter above this size will always cause lost
packets. This parameter should be set to the smallest possible value that will support the expected network jitter.
video.profile.H261.jitterBufferMin
1
33ms to 1000ms, default 150ms
The smallest jitter buffer depth (in milliseconds) that must be achieved before play out begins for the first time.
Once this depth has been achieved initially, the depth may fall below this point and play out will still continue.
This parameter should be set to the smallest possible value which is at least two packet payloads, and larger
than the expected short term average jitter.
video.profile.H261.jitterBufferShrink
1
33ms to 1000ms, default 70ms
The absolute minimum duration time (in milliseconds) of RTP packet Rx with no packet loss between jitter buffer
size shrinks. Use smaller values (33 ms) to minimize the delay on known good networks. Use larger values
(1000ms) to minimize packet loss on networks with large jitter (3000 ms).
video.profile.H261.payloadType
1
0 to 127, default 31
RTP payload format type for H261 MIME type.