Administrator Guide - SoundPoint® IP / SoundStation® IP Optimization
80 Copyright © 2004 Polycom, Inc.
4.6.1.6.2 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 handsfree/chassis).

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.

voice.audioProfile.x.jitterBufferMin 40, 50, 60, ...
(multiple of
10)
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.
voice.audioProfile.x.jitterBufferShrink 10, 20, 30, ...
(multiple of
10)
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).
voice.audiProfile.x.jitterBufferMax > jitterBuf-
ferMin,
multiple of
10,
<=500 for IP
500 and IP
600,
<= 160 for IP
300
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.
Attribute
Permitted
Values Default Interpretation
voice.volume.persist.handset 0, 1 0 If set to 1, the receive volume will be
remembered between calls.
If set to 0, the receive volume will be
reset to nominal at the start of each
call.
voice.volume.persist.headset 0, 1 0
voice.volume.persist.handsfree 0, 1 1
Attribute
Permitted
Values Interpretation