Avaya Nortel Communication Server 1000 Manual page 288

288 Configuration of IP Telephony nodes using Element Manager
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Figure 65
Selected Codec
Element Manager enables some jitter buffer adjustments on the
browser side. The following are the jitter buffer adjustments that
are made in Element Manager:
• A change of payload resets the Nominal Voice Playout (NVP)
and Maximum Voice Playout (MVP) values to the default
recommended values:
NVP = 2 * payload
MVP = NVP + 2 * payload
• A change of NVP value changes the MVP value to the default
(MVP = NVP + 2 * payload) and changes the values listed in the
MVP pull down list so the minimum value listed does not violate
the requirement of NVP + 2 * payload.
• The MVP value can be changed. The pull-down values range
from the minimum recommended value (see above) to the
maximum allowed value for the selected codec type.
Configure the following values for the codec:
a. Codec Name: The codec name is based on the selected codec.
b. Voice payload size (ms/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.
Nortel Communication Server 1000
IP Line Fundamentals
NN43100-500 02.02 Standard
Release 5.5 4 February 2008