Polycom 1725-11530-310 Administrator's Manual page 361

Administrator's Guide Addendum for the Polycom VVX 1500 Business Media Phone
Attribute
video.profile.H263.jitterBufferMin
video.profile.H263.jitterBufferShrink
video.profile.H263.CifMpi
video.profile.H263.QcifMpi
video.profile.H263.SqcifMpi
video.profile.H2631998.jitterBufferMax
video.profile.H2631998.jitterBufferMin
1 - 14
Permitted
Values Interpretation
33ms to The smallest jitter buffer depth (in milliseconds)
1000ms, that must be achieved before play out begins
default 150ms 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.
33ms to The absolute minimum duration time (in
1000ms, milliseconds) of RTP packet Rx with no packet
default 70ms 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).
1 (default) to 32 This value is H263/90000 format parameter
CIF used to signal Polycom VVX 1500
receiving capability in SDP.
This value also controls the TX frame size. If
set to 1, CIF is used (provided the far end
supports CIF=1); otherwise QCIF is used.
1 (default) to 32 This value is H263/90000 format parameter
QCIF used to signal Polycom VVX 1500
receiving capability in the SDP.
1 (default) to 32 This value is H263/90000 format parameter
SQCIF used to signal Polycom VVX 1500
receiving capability in the SDP.
(video.profil The largest jitter buffer depth to be supported
(in milliseconds). Jitter above this size will
e.H2631998.ji
always cause lost packets. This parameter
tterBufferMin
+ 500ms) to should be set to the smallest possible value
2500ms, that will support the expected network jitter.
default 2000ms
33ms to The smallest jitter buffer depth (in milliseconds)
1000ms, that must be achieved before play out begins
default 150ms 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.