Polycom RealPresence 800s Administrator's Manual page 396

RealPresence Collaboration Server (RMX) 800s/Virtual Edition Administrator's Guide
If the network administrator does not specify an adequate port range, the system will accept the
settings and issue a warning. Calls will be rejected when the Collaboration Server's ports are
exceeded.
10 If required, click the QoS tab.
Quality of Service (QoS) is important when transmitting high bandwidth audio and video information.
QoS can be measured and guaranteed in terms of:
• Average delay between packets
• Variation in delay (jitter)
• Transmission error rate
DiffServ and Precedence are the two QoS methods supported by the Collaboration Server. These
methods differ in the way the packet's priority is encoded in the packet header.
The Collaboration Server's implementation of QoS is defined per Network Service, not per endpoint.
The routers must support QoS in order for IP packets to get higher priority.
11 View or modify the following fields:
RealPresence Collaboration Server 800s - Default IP Service – Conferencing – QoS Parameters
Field
Enable
Polycom®, Inc.
Description
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.
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