Polycom RMX 1500 Administrator's Manual page 457

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11 View or modify the following fields:

Default IP Service – Conferencing – QoS Parameters

Select to enable the configuration and use of the

QoS settings.

When un-checked, the values of the DSCP

(Differentiated Services Code Point) bits in the IP

packet headers are zero.

DiffServ and Precedence are two methods for

encoding packet priority. The priority set here for

audio video and IP Signaling packets should match

the priority set in the router.

DiffServ: Select when the network router uses

DiffServ for priority encoding.

The default priorities for both audio and video

packets is 0x88. These values are determined

by the QOS_IP_VIDEO and QOS_IP_AUDIO

flags in the system.cfg file.

The default priority for Signaling IP traffic is 0x00

and is determined by the QOS_IP_SIGNALING

flag in the system.cfg file.

For more information see "Modifying System Flags"

on page 19-5.

Precedence: Select when the network router

uses Precedence for priority encoding, or when

you are not sure which method is used by the

router. Precedence should be combined with

None in the TOS field.

The default priority is 5 for audio and 4 for video

Note: Precedence is the default mode as it is

capable of providing priority services to all types

of routers, as well as being currently the most

common mechanism.

Chapter 14-Network Services

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