Polycom Version 8.4 10 If required, click the QoS tab.

IP Network Services
Polycom®, Inc. 371
RealPresence Collaboration Server 800s - Default IP Service – Conferencing – Ports
Parameters
10 If required, click the QoS tab.
Field Description
Fixed Ports Leave this check box cleared if you are defining a Network Service for local calls
that do not require configuring the firewall to accept calls from external entities.
When cleared, the system uses the default port range and allocates 4 RTP and
4 RTCP ports for media channels (Audio, Video, Content and FECC).
Note: When ICE Environment is enabled, 8 additional ports are allocated to
each call.
Click this check box to manually define the port ranges or to limit the number of
ports to be left open.
TCP Port from - to Displays the default settings for port numbers used for signaling and control.
To modify the number of TCP ports, enter the first and last port numbers in the
range.
The number of ports is calculated as follows:
Number of simultaneous calls x 2 ports (1 signaling + 1 control).
UDP Port from - to 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 per media
card.
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.