Polycom VSX Series manual Specifying Quality of Service

Configuring Network Use

Specifying Quality of Service

Set the Quality of Service options for the way your network handles IP packets during video calls.

To specify Quality of Service:

1.Go to System > Admin Settings > Network > IP > Quality of Service.

2.Configure these settings:

Setting	Description
Type of Service	Specifies your service type and lets you choose how to set the
	priority of IP packets sent to the system for video, audio, and
	far-end camera control:
	• IP Precedence — Represents the priority of IP packets
	sent to the system. The value can be between 0 and 5. If
	this setting is selected, enter the value in the Type of
	Service Value field.
	• DiffServ — Represents a priority level between 0 and 63. If
	this setting is selected, enter the value in the Type of
	Service Value field.
Type of Service	Specifies the IP Precedence or Diffserv value for Video, Audio,
Value	and Far End Camera Control.
Maximum	Specifies the Maximum Transmission Unit (MTU) size used in
Transmission	IP calls. If the video becomes blocky or network errors occur,
Unit Size	packets may be too large; decrease the MTU. If the network is
	burdened with unnecessary overhead, packets may be too
	small; increase the MTU.
Enable PVEC	Allows the system to use PVEC (Polycom Video Error
	Concealment) if packet loss occurs.
Enable RSVP	Allows the system to use Resource Reservation Setup Protocol
	(RSVP) to request that routers reserve bandwidth along an IP
	connection path. Both the near site and far site must support
	RSVP in order for reservation requests to be made to routers
	on the connection path.

3 - 15