In this section:
The SBC Core supports the following Real Time Control Protocol (RTCP) modes for media:
RTCP Modes for Media
|
|
|---|---|
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.
Command Syntax
% set system media
dedicatedBWForNonRTPMedia (0-50)
mediaPeerInactivity
inactivityTimeout <20-1260, in multiples of 10>
mediaPortRange
baseUdpPort <1024-65534>
maxUdpPort <1024-65534>
highPriorityPortRangeLocation <top | bottom>
highPriorityPortRangeSize <0 to 25)>
mediaProbe
dscpValue <0-63>
encryptionType <None>
format <rtcp>
mediaProbeAddressContext <addressContext>
mediaProbeIpInterfaceGroup <mediaIpInterfaceGroup>
protocolType <udp>
reportingInterval <1-8>
state <disabled | enabled>
mediaRtcpControl
sendBYEPacket <disabled | enabled>
senderReportInterval <5-120>
t140RtcpMonitorInterval <2-20>
tcpPortRange
baseServerPort <1-65534>
maxServerPort <1-65534>
Command Parameters
Note
When configuring System Media, the mediaProbe configuration is optional (default state is "disabled"). However, when configuring the parameter mediaProbe, ensure to configure all values (or accept defaults, where applicable).
System Media
Parameter | Length/Range | Description |
|---|---|---|
| 0-50 | Use this control to specify (reserve) an amount, as a percentage, of bandwidth usage to limit across all physical interfaces for non-RTP media (default = 0). NOTE: This feature only applies to TCP media traffic such as MSRP. |
| N/A | Use this control to set detection of media peer inactivity (
When both RTP and RTCP are enabled, the timeout will only occur if both packet types remain undetected for the configured When INFO: When using this feature, you must also set the " NOTE: If a valid RTP stream does not send enough packets, use NOTE: If the endpoint does not send both RTP and RTCP packets frequently enough within the Note: On the PSX Manager > Packet Service Profile screen, the field "Media Peer Inactivity Timeout (s)" allows the user to reduce the timeout duration to 0-1260 seconds for specific zones during emergency calls such as 911 calls. By default it is set to 0 (disabled). The value set on the PSX Manager takes precedence over the value set on the SBC side. When the field "Media Peer Inactivity Timeout (s)" on the PSX is set to 0 (disabled), the SBC uses the configuration value set on the SBC side. |
| N/A | Use this control to set the UDP media port range for RTP and RTCP.
High priority port range is optional configuration that divides the media port range into a high-priority port range and a low-priority port range. Under congestion conditions, all the packets received on ports outside the high priority media range are dropped automatically by the network processing layer. Therefore, if you choose to configure SIP signaling ports within the media port range, Unable to show "metadata-from": No such page "_space_variables" recommends they reside within the high priority port range so that packets are not dropped.Note:
|
mediaProbe | N/A | To facilitate monitoring and management of voice quality by the SBC Core and Ribbon Analytics, the SBC supports the following functionality to allow service providers to see discrete variations in voice quality, as well as monitor SLA and network operations.
NOTE: Ribbon Protect is rebranded to Ribbon Analytics. Any references to 'Ribbon Protect' and 'Protect' in the SBC Core documentation apply to the Ribbon Analytics product. NOTE: To establish communication to Unable to show "metadata-from": No such page "_space_variables" Protect, refer to Protect - CLI.Configure Unable to show "metadata-from": No such page "_space_variables" Protect.
|
| N/A | Use this control to configure the RTCP session.
|
| N/A | This port range is used by the SBC to advertise its TCP port on which it can accept connections. A unique unused port from this range will be included in the SDP media line in the offer or answer towards the MSRP UAs. SBC uses a port from this range per MSRP call leg if it takes up a TCP server role. To create a TCP port range, use the
|
Command Examples
General Media Configuration Example
The following example sets inactivityTimeout value to 90, the baseUdpPort to 6000, the maxUdpPort number to 65100 and the senderReportInterval to 6 seconds and sendBYEPacket to enabled, plus sets the peerAbsenceAction parameter from packetServiceProfile object to send a trap if inactivity is detected.
set system media mediaPeerInactivity inactivityTimeout 90
set system media mediaPortRange baseUdpPort 6000 maxUdpPort 65100
set system media mediaRtcpControl senderReportInterval 6
set system media mediaRtcpControl sendBYEPacket enabled
set system media mediaRtcpControl t140RtcpMonitorInterval 6
set profiles media packetServiceProfile DEFAULT peerAbsenceAction peerAbsenceTrap
show system media
mediaPortRange {
baseUdpPort 6000;
maxUdpPort 65200;
}
mediaPeerInactivity {
inactivityTimeout 90;
}
mediaRtcpControl {
senderReportInterval 6;
sendBYEPaket enabled;
t140RtcpMonitorInterval 6;
}
Media Probe Configuration Example
Command Example: system media mediaProbe
set system media mediaProbe dscpValue 0 encryptionType none format rtcp mediaProbeAddressContext ADDR_CONTEXT_1 mediaProbeIpInterfaceGroup INGRESS_LIG protocolType udp reportingInterval 1 state enabled commit show system media mediaProbe state enabled; reportingInterval 1; protocolType udp; encryptionType none; format rtcp; dscpValue 0; mediaProbeAddressContext ADDR_CONTEXT_1; mediaProbeIpInterfaceGroup INGRESS_LIG;
Overview
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