AudioCodes Mediant 500 MSBR, User Manual

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User's Manual 184 Document #: LTRT-10375
Mediant 500 MSBR
device to use the same port for RTP and T.38 packets, by configuring the T38UseRTPPort
parameter to 1.
Within the port range, the device allocates the UDP ports per media channel (leg) in
"jumps" (spacing) of 10. For example, if the port range starts at 6000 and the UDP port
spacing is 10, the available ports are 6000, 6010, 6020, 6030, and so on. Within the port
range, the device assigns these ports
randomly to the different media channels. For
example, it allocates port 6000 to leg 1, port 6030 to leg 2, and port 6010 to leg 3.
You can configure the starting port (lower boundary) of the port range (default is 6000),
using the BaseUDPPort parameter. Once configured, the port range is according to the
following equation:
<BaseUDPPort parameter value> to
65,535
Where, number of channels is the maximum number of purchased channels for the device
(included in the installed License Key).
For example, if you configure the BaseUDPPort parameter to 6000, the port range is 6000
to 65,535.
You can also configure specific port ranges for specific SIP entities, using Media Realms
(see Configuring Media Realms on page 307). You can configure each Media Realm with a
different UDP port range and then associate the Media Realm with a specific IP Group, for
example. However, the port range of the Media Realm
must be within the range
configured by the BaseUDPPort parameter.
The following procedure describes how to configure the RTP base UDP port through the
Web interface.

To configure the RTP base UDP port:
1. Open the RTP/RTCP Settings page ( Setup menu > Signaling & Media tab > Media
folder > RTP/RTCP Settings ).
2. In the 'RTP Base UDP Port' field, configure the lower boundary of the UDP port range.
Figure 17-10: Configuring RTP Base UDP Port
3. Click Apply , and then reset the device with a save-to-flash for your settings to take
effect.
Note:
•
The RTP port must be different from ports configured for SIP signaling traffic (i.e.,
ports configured for SIP Interfaces). For example, if the RTP port range is 6000 to
6999, the SIP port can either be less than 6000 or greater than 6999.
•
The base UDP port number (BaseUDPPort parameter) must be greater than the
highest UDP port configured for a SIP Interface (see Configuring SIP Interfaces on
page 325). For example, if your highest configured UDP port for a SIP Interface is
6060, you must configure the BaseUDPPort parameter to any value greater than
6060.
17.4 Event Detection and Notification using X-Detect
Header
The device can detect certain events in the media stream (for SBC and Gateway calls) and
notify of their detection to a remote application server, using the SIP X-Detect header. The
request for event notification is done by the application server when establishing a SIP