Chapter 11 – IP Service Settings

Parameter

Description

 

DiffServ and Precedence are two methods for encoding

 

packet priority. The priority set here for audio and video

 

packets should match the priority set in the network

 

routers.

 

ƒ Differv: Select when the network router uses Differv for

 

priority encoding. If this option is selected, enter values

 

in the Audio and Video fields. The value range is 0~63.

 

Note: If you select DiffServ but your router does not

 

support this standard, IP packets queue on the same

 

communication links with data packets. This

Type

non-prioritized queueing greatly increases the latency and

jitters in their delivery and can negatively impact

 

 

performance.

 

ƒ Precedence: Select this option 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 matched with None in the Tos

 

field. If this option is selected, enter values in the Audio

 

and Video fields, in the value range of 0~5.

 

Note: Precedence is the default mode as it is capable of

 

providing priority services to all types of routers and is

 

currently the most common mechanism.

 

 

 

You can prioritize audio and video IP packets to ensure

 

that all participants in the conference hear and see each

Audio / Video

other clearly.

The recommended priority is 4 for audio and video to

 

ensure that the packet delay for both is the same, that

 

audio and video packets are synchronized, and to ensure

 

lip and audio synchronization (lip sync).

 

 

 

Select the Type of Service (ToS) that defines optimization

 

tagging for routing the conference audio and video

 

packets.

 

ƒ Delay: The recommended default for video

Tos

conferencing; prioritized audio and video packets tagged

with this definition are delivered with minimal delay

 

 

ƒ 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.

 

 

Ports

Users can set firewall-allowed ports that are used for multimedia conference calls. In the IP Network Services interface, click Ports to configure the port information.

Figure 11-7IP Network Services – Ports

11-8

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Image 103
Polycom 3150-16966-002, RMX 1000 manual Ports, 11-8, Type, Audio / Video, Tos