Polycom IP 320 Administrator's Manual page 229

Attribute
voice.codecPref.VVX_1500.
Siren14.48kbps
voice.codecPref.iLBC.VVX_1500.
13_33kbps
voice.codecPref.iLBC.VVX_1500.
15_2kbps
Note
Attribute
voice.audioProfile.x.payloadSize
voice.audioProfile.x.jitterBufferMin
voice.audioProfile.x.jitterBufferShrink
Permitted
Values
Codecs with a default of Null are available for test purposes only and are not
expected to be used in your deployment.
Codec Profiles <audioProfile/>
The following profile attributes can be adjusted for each of the five supported
codecs. In the table, x=G711Mu, G711A, G719, G722, G7221, G7221C, G729AB,
Lin16, Siren14, Siren22, and iLBC.
Permitted
Values
10, 20, 30, ...80
20, 40, 50, 60,
... (multiple of
10)
10, 20, 30, ...
(multiple of 10)
Default Interpretation
Null
Null
Null
Interpretation
Preferred Tx payload size in milliseconds to be
provided in SDP offers and used in the
absence of ptime negotiations. This is also the
range of supported Rx payload sizes.
The payload size for G719, G7221, G7221C,
Siren14, Siren22, and iLBC are further
subdivided.
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. The IP4000 values are the
same as the IP30x values.
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 networks. Use larger values to
minimize packet loss on networks with large
jitter (3000 ms).
Configuration Files
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