Page 384 of 910 Configuration of IP Telephony nodes using Element Manager
553-3001-365 Standard 4.00 August 2005
5Configure the following values for the codec:
a. Codec Name: The codec name is based on the selected codec.
b. Voice payload size (msecs/frame): The payload size is determined
by the selected codec.
For each codec type, the payload is defaulted to the maximum
supported: 30 msec for G.711 (a-law and mu-law), 50 msec for
G.729A, 50 msec for G.729AB, and 30 msec for the G.723.1.
Note: If a system has multiple nodes and the same codec is selected on
more than one node, ensure that each node has the same voice payload
size configured for the codec.
c. Voice playout (jitter buffer) nominal delay: Set the nominal value
to the highest setting that the device allows. The range is 20–200 ms
and is dependent on the codec. Changing this value can cause the
automatic adjustment of the other settings for this codec. For more
information, see Converging the Data Network with VoIP
(553-3001-160).”
d. Voice playout (jitter buffer) maximum delay: The maximum delay
has a range of 60–500 ms and is dependent on the codec. Changing
this value can cause the automatic adjustment of the other settings
for this codec.
e. VAD: Select this check box to enable Voice Activity Detection.
6Repeat step 5 for each of the selected codecs.
End of Procedure