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Polycom, Inc. 496
14 Click the SIP Servers tab.
15 Modify the following fields:
Audio / Video You can prioritize audio and video IP packets to ensure that all participants in
the conference hear and see each other clearly. Select the desired priority. The
scale is from 0 to 5, where 0 is the lowest priority and 5 is the highest. The
recommended priority is 4 for audio and 4 for video to ensure that the delay for
both packet types is the same and that audio and video packets are
synchronized and to ensure lip sync.
TOS Select the type of Service (TOS) that defines optimization tagging for routing the
conferences audio and video packets.
• Delay: The recommended default for video conferencing; prioritized audio
and video packets tagged with this definition are delivered with minimal delay
(the throughput of IP packets minimizes the queue sequence and the delay
between packets).
•None: No optimization definition is applied. This is a compatibility mode in
which routing is based on Precedence priority settings only. Select None if
you do not know which standard your router supports.
Default IP Service – Conferencing – QoS Parameters
Field Description