Polycom MGC-50, MGC-100 manual Tos

MGC-50/MGC-100 Getting Started Guide

Table 3-9: QoS of Ethernet Service Options (Continued)

Field	Description
DiffServ and	DiffServ and Precedence are two methods for
Precedence	encoding the packet’s priority in the packet header.
	If you are not sure which QoS policy your router
	supports, select Precedence combined with None
	in the TOS field.
	• Select DiffServ when the network router uses
	DiffServ for priority encoding).
	Note: If you select DiffServ but your router does
	not support this standard, IP packets queue on
	the same communication links with data packets
	greatly increasing the latency and jitter in their
	delivery.
	• Select Precedence when the network router
	uses Precedence for priority encoding, or when
	you are not sure which method is used by the
	router.
Audio and 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 recommended priority for both audio and video
	is 4 to ensure that the delay for both packets is the
	same and audio and the video packets are
	synchronized.
TOS	Type of Service (TOS) defines optimization tagging
	for routing the conferences audio and video packets.
	• Delay – The recommended default for video
	conferencing.
	• None – No optimization definition is applied.
	Select None if you do not know which standard your
	router supports.

c.Click OK to apply your settings and return to the Settings dialog box.

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