DBL Technology GoIP User Manual page 31

3.3.6Media
This section allows the user to program various settings for media (voice) transmission and format.
Depending on your network environment and condition, you may or may not need to change these settings.
Please see the parameter table below for more information.
Parameters
(Media)
1. RTP Port Range
2. Packet length (ms)
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Description
This specifies the range of RTP port to be used for audio stream.
This specifies the length (in time) of each packet. However, the packet length is codec
dependent as well. The minimum packet length of a codec supersedes the valued
specified here. The table below summarizes the possible packet length for the codec
supported.
Codec
G.711 a-law / -law
G.729, G.729A,
G.729AB
G.723.1
Time / Frame (ms) Time / Packet
(ms)
0.125
10 10, 20, 30
30 30, 60
GoIP User Manual
Default Value
16384 - 32768
20
30