Configuring Advanced Features
677
Real-Time Transport Protocol (RTP) Ports
The Real-time Transport Protocol (RTP) is a network protocol for delivering audio over IP
networks. The phone is compatible with
RFC 1889 - RTP: A Transport Protocol for Real-Time
- and the updated
. It treats all RTP streams as bi-directional from a
control perspective and expects that both RTP end points will negotiate the respective
destination IP addresses and 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 on port 11780. Additional calls would then use ports
11782, 11784, 11786, and so on. up to the max port.
Procedure
RTP ports can be configured using the following methods.
Central Provisioning
(Configuration File)
<y0000000000xx>.cfg
Configure RTP ports.
Parameters:
static.network.port.max_rtpport
static.network.port.min_rtpport
Web User Interface
Configure RTP ports.
Navigate to
:
http://<phoneIPAddress>/servlet?p
=network-adv&q=load
Details of Configuration Parameters:
Parameters
Permitted Values
Default
static.network.port.min_rtpport
Integer from
1024 to 65535
11780
Description:
Configures the minimum local RTP port.
Note
: If you change this parameter, the IP phone will reboot to make the change take
effect.
Web User Interface:
Network->Advanced->Local RTP Port->Min RTP Port (1024~65535)
Phone User Interface:
None
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