Polycom SoundPoint IP 301 Administrator's Manual page 103

Administrator Guide - SoundPoint
4.6.1.8.1.2 Codec Profiles <profiles/>
The following profile attributes can be adjusted for each of the three supported codecs.
In the table, x=G711Mu, G711A, or G729AB.
Attribute
voice.audioProfile.x.payloadSize
voice.audioProfile.x.jitterBufferMin
voice.audioProfile.x.jitterBufferShrink
voice.audioProfile.x.jitterBufferMax
4.6.1.8.2 Volume Persistence <volume/>
The user's selection of the receive volume during a call can be remembered between
calls. This can be configured per termination (handset, headset and hands-free/chas-
sis). In some countries regulations exist which dictate that receive volume should be
reset to nominal at the start of each call on handset and headset.
® ®
IP / SoundStation IP
Permitted
Values
10, 20, 30,
...80
40, 50, 60, ...
(multiple of
10)
10, 20, 30, ...
(multiple of
10)
> jitterBuf-
ferMin,
multiple of
10,
<=500 for IP
500, 501 and
600,
<= 160 for IP
300 and 301
Copyright © 2005 Polycom, Inc.
Interpretation
Preferred Tx payload size in millisec-
onds to be provided in SDP offers and
used in the absence of ptime negotia-
tions. This is also the range of supported
Rx payload sizes.
The smallest jitter buffer depth (in milli-
seconds) 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 pay-
loads, and larger than the expected short
term average jitter.
The absolute minimum duration time (in
milliseconds) of RTP packet Rx with no
packet loss between jitter buffer size
shrinks. Use smaller values (1000 ms) to
minimize the delay on known good net-
works. Use larger values to minimize
packet loss on networks with large jitter
(3000 ms).
The largest jitter buffer depth to be sup-
ported (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.
Optimization
95