Configuring Invalid Rtp/Rtcp Packet Handling; Event Detection And Notification Using X-Detect Header - AudioCodes Mediant 4000 SBC User Manual


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.
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.

14.3.4 Configuring Invalid RTP/RTCP Packet Handling

You can configure the way the device handles incoming invalid RTP and RTCP packets.
This is applicable only if you configure the IP Profile parameter, 'Mediation Mode'
(IpProfile_TranscodingMode) to RTP Forwarding.

To configure invalid packet handling:
1. Open the RTP/RTCP Settings page (Setup menu > Signaling & Media tab > Media
folder > RTP/RTCP Settings).
2. From the 'FW Non Configured Packet Handling' drop-down list, select the required
handling for RTP packets with unknown payload types.
3. From the 'FW Invalid Packet Handling' drop-down list, select the required handling for
invalid RTP and RTCP packets.
4. Click Apply.
Note: Invalid packet handling configuration is applicable only to the SBC application.
14.4 Event Detection and Notification using X-Detect
Header
The device can detect certain events in the media stream 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 dialog (i.e., INVITE
message) or during an already established call using a re-INVITE message.
The device can detect the following event types:

Answering Machine Detection (AMD): Detects events that are related to the AMD
feature. AMD detects whether an answering machine or live voice has answered the
call. It can also be used to detect silence, or the beep sound played by an answering
machine to indicate the end of the greeting message after which a voice message can
User's Manual
Figure 14-10: Configuring RTP Base UDP Port
196
Mediant 4000 SBC
Document #: LTRT-42025