Polycom RealPresence 800s Administrator's Manual page 322

RealPresence Collaboration Server 800s Administrator's Guide
10 If required, click the QoS tab.
The routers must support QoS in order for IP packets to get higher priority.
16-14
Table 16-8 Default IP Service – Conferencing – Ports Parameters (Continued)
Field
UDP Port from - to
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.
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.
Description
Displays the default settings for port numbers used for audio and
video.
To modify the number of UDP ports:
Enter the first and last port numbers in the range, and the range
must be 1024 ports.
When ICE environment is enabled, the range must be 2048 ports.
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