Phone Network
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Real-Time Transport Protocol (RTP) Ports
You can specify the IP phone’s RTP port range. Since the IP phone supports conferencing and multiple
RTP streams, it can use several ports concurrently. The UDP port used for RTP streams is traditionally an
even-numbered port. For example, the default RTP min port on the IP phones is 11780. The first voice
session sends RTP using port 11780. Additional calls would then use ports 11782, 11784, 11786, and so
on. The phone is compatible with RFC 1889 - RTP: A Transport Protocol for Real-Time Applications - and
the updated RFC 3550.
Topic
RTP Ports Configuration
RTP Ports Configuration
The following table lists the parameters you can use to configure RTP ports.
static.network.port.min_rtpport
[1]
It configures the minimum local RTP port.
Integer from 1024 to 65535
Network->Advanced->Local RTP Port->Min RTP Port (1024~65535)
static.network.port.max_rtpport
[1]
It configures the maximum local RTP port.
Note: The value of the maximum local RTP port cannot be less than that of the
minimum local RTP port.
Integer from 1024 to 65535
Network->Advanced->Local RTP Port->Max RTP Port (1024~65535)
features.rtp_symmetric.enable
[1]
It configures the symmetrical RTP (Real-Time Transport Protocol) feature on the IP
phone.
Note: IP address and port can be negotiated through the SDP protocol.
0-Disabled
1-reject RTP packets arriving from a non-negotiated IP address
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