Port Ranges Overview; Rtp Over Udp; Udp; Signaling Ports - Nortel BCM50 Configuration Manual

Chapter 48

Port ranges overview

The Port Ranges panel provides a list of which Ports are currently being used for RTP/UDP, UDP,
and Signaling. In the case of RTP over UDP and UDP, it allows changes to the ports being used.
For information on configuring port ranges, see
Warning: Port configuration should not be changed unless absolutely necessary, such as
in instances where port configurations are causing conflicts, or if a firewall is restricting
communications over certain ports.

RTP over UDP

RTP over UDP is used by IP sets to connect to media gateways, and by IP trunks to connect to
remote devices or PDM devices. All of these services require RTP over UDP. Each media gateway
uses two ports. By default, RTP over UDP is set to use the port range 28000 - 28255. It's
recommended that you keep 256 ports configured for RTP over UDP. The BCM requires a
minimum of 110 ports to support necessary services. This includes 32 IP sets, 11 voice mail and
contact center voiceports, and 12 trunks. Each of these devices requires two RTP over UDP ports.
You can configure up to ten separate ranges of ports.

UDP

UDP is used for T.38 Fax over UDP. By default, it uses the Range 20000 to 20255. You can
configure up to ten separate ranges of ports. While the system can function with 12 ports, it is
recommended that 256 ports are reserved.

Signaling Ports

Signaling ports are used by the system and cannot be modified. They are provided to show where
conflicts with UDP or RTP occur.
"Port Ranges panel" on page
Networking Configuration Guide
405
407.