Polycom CX5100 Administrator's Manual page 82

Video Profile Parameters (continued)
Parameter
video.profile.H261.jitterBufferMin
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 still continues. 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
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
RTP payload format type for H261 MIME type.
video.profile.H261.QcifMpi
Specify the frame rate divider that the system uses when negotiating Quarter 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.H263.CifMpi
Specify the frame rate divider that the system uses when negotiating CIF resolution for a video call. You can enter a
value between 0-32. To disable, enter '0'. The default frame rate divider is '1'.
video.profile.H263.jitterBufferMax
The largest jitter buffer depth to be supported (in milliseconds). Jitter above this size always causes lost packets. This
parameter should be set to the smallest possible value that supports the expected network jitter.
video.profile.H263.jitterBufferMin
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 still continues. 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.H263.jitterBufferShrink
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.H263.payloadType
RTP payload format type for H263 MIME type.
video.profile.H263.QcifMpi
Specify the frame rate divider that the system uses when negotiating Quarter CIF resolution for a video call. You can
enter a value between 0-32. To disable, enter '0'. The default frame rate divider is '1'.
Polycom, Inc.
Permitted Values
1 33ms to 1000ms
1
33ms to 1000ms
1 0 to 127
1
1 to 32
1 1 to 32
1
(video.profile.H263.jitter
BufferMin + 500ms) to
2500ms
1 33ms to 1000ms
1 33ms to 1000ms
1 0 to 127
1 1 to 32
Configuration Parameters
Default
150ms
70ms
31
1
1
2000ms
150ms
70ms
34
1
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