The SBC Core supports the following Real Time Control Protocol (RTCP) modes for media:

RTCP Modes for Media


RTCP Mode


RTCP Behavior

RTCP Relay for pass-through calls with RTCP enabled on both legs

RTCP is relayed between two end users. The SBC will not terminate the RTCP sessions; however, it will set up the media-path to forward RTCP packets from one party to the other. This is the default and recommended approach for handling RTCP for pass-through calls.

RTCP termination for a pass-through call with RTCP enabled on only one leg

 

RTCP for transcoded calls legs

If RTCP is enabled on the leg, the SBC will terminate RTCP.

In either pass-through or termination modes, the SBC collects packet RTCP statistics and reports them for output to CDRs. Configurable parameters include:

  • Media peer inactivity—Configure media peer inactivity time out value. When using this feature, you must also set the flag, peerAbsenceAction, from the Packet Service Profile.
  • Media port range—Use this control to set the UDP media port range for RTP and RTCP.
  • Media RTCP control—Configure sender report interval.

 

On the SBC main screen, go to All > System > Media. The Media window is displayed.

System - Media

 

 

The following fields are displayed:

System - Media parameters

 
Parameter Description
 Dedicated BW For Non RTPMedia

Use this control to specify (reserve) an amount, as a percentage, of bandwidth usage to limit across all physical interfaces for non-RTP media. Acceptable values are 0 to 50, with the default value of 0.

This feature only applies to TCP media traffic such as MSRP.

Make the required changes and click Save at the right hand bottom of the panel to save the changes made.

 

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