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Polycom RealPresence Collaboration Server (RMX) 1500/2000/4000 Administrator’s Guide
16-16 Polycom, Inc.
The port range recommended by IANA (Internet Assigned Numbers Authority) is
49152 to 65535. The RMX uses this recommendation along with the number of licensed
ports to calculate the port range.
9 Modify the following fields:
Table 16-8 Default IP Service – Conferencing – Ports Parameters
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:
• In MPM Card Configuration Mode:
Enter the first and last port numbers in the range.
The number of ports is calculated as follows:
Number of simultaneous calls x 8 ports (2 audio, 2 video, 2
Content and 2 FECC).
• In MPM+/MPMx Card Configuration Mode:
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.
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 RMX’s ports are exceeded.