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IMPORTANT

The Transparency Profile is the recommended method of configuring transparency on the SBC Core for new deployments as well as when applying additional transparency configurations to existing deployments. Do not use IP Signaling Profile flags in these scenarios because the flags will be retired in upcoming releases.

Refer to the SBC SIP Transparency Implementation Guide for additional information.

Use this object to define the parameters associated with the Media features for this SIP trunk group.

Note

The SBC 52x0 and SBC 7000 systems support creating IP Interface Groups containing sets of IP interfaces that are not "processor friendly" (i.e. carried on physical Ethernet ports served by separate processors). However, restrictions exist regarding the usage of such Interface Groups.

(This ability does not apply to the SBC 51x0 and SBC 5400 systems which have only two physical media ports. IP interfaces from the two physical ports may be configured within the same IP Interface Groups without restriction.)

For complete details, refer to Configuring IP Interface Groups and Interfaces.

To View and Edit Media

On SBC main screen, go to Configuration > System Provisioning > Category: Trunk Provisioning > Trunk Group > Sip Trunk Group > Media. The Media window is displayed.

The Media can be checked for each Address Context, for each Zone, for each Sip Trunk Group created or for all the Address Contexts, Zones and Sip Trunk Groups created. Use the drop-down box to select the desired Address Context, Zone and Sip Trunk Group.

The Edit Media window is displayed.

Sip Trunk Group - Media Edit Window

 

The following fields are displayed:

Sip Trunk Group - Media parameters

 

Parameter

Description

Data Path mode Passthru

 Specifies whether the  SBCwill transpass media direction (Data Path Mode) received from a peer in the Offer SDP RTP IP.

  • Disabled (default)
  • Enabled

Direct Media Allowed

 

If enabled, attempt to set up a direct-media path so that media flows directly between endpoints in the same direct-media group.

  • Disabled (default) 
  • Enabled
Dtls Profile NameSpecifies the name of the Dtls Profile which would be attached to this Trunk Group. To create a Dtls Profile, refer to Security - Dtls Profile.

Direct Media Allowed Behind Napt

 

If enabled, attempt to set up a direct-media call for endpoints behind NAT.

  • Disabled (default)
  • Enabled

Direct Media Anti Trombone

Enable flag on trunk groups facing AS to allow direct media using C-line trigger (e.g. media antitrombone).

  • Disabled (default)
  • Enabled

Direct Media configuration (Direct Media Allowed flag) must be enabled on trunk groups facing the endpoints for this feature to function.


Direct Media Group Id

This identifies the direct media group to which this trunk group belongs. The value ranges from 0 to 655535 and the default value is 0.

Late Media Support

Determines whether a SIP late media (reverse offer) INVITE should be converted to a forward offer on egress or else allowed to transparently pass through.

  • Convert (default)
  • Passthru

If you configure Packet Service Profile Packet To Packet Control for “Transcode Free Transparency” (see System Provisioning - Packet Service Profile), ensure you also set Late Media Support to ‘passthru’.


When Late Media Support is set to convert and Direct Media Allowed flag is enabled for the same call, the late media convert takes precedence for the original egress INVITE being generated. Eventually, the call transitions to a direct media call.

 

Set this flag at the Ingress leg of the Trunk Group.


Max Ptime Default

This field indicates the default packet size in milliseconds. The value ranges from 10 to 150 and the default value is 150.

Comedia Connection Role

 Indicates whether the SDP offer sent by  SBC includes any direction attribute line defined by COMEDIA draft.
  • Active – The SDP offer will include "a=direction: active" attribute line.
  • None – The SDP offer will not include a direction attribute line.
  • Passive – The SDP offer will include "a=direction: passive" attribute line.
Tmr64K

Enable this flag to allow the transmission Medium Requirement Unrestricted 64kbit/s control for SIP-ISUP interworking.

  • Disabled (default)
  • Enabled

Media Ip Interface Group Name

Name of the IP interface group for media.

Media Ip Address

default = 0.0.0.0

Each trunk group can have a Media Ip Address configured to specify a specific IP address to use when allocating UDP or TCP media. If you prefer to choose an IP Address from a range of values configured in Media Port Range (UDP) or TCP Port Range, use the default value  “0.0.0.0” for Media Ip Address parameter.

The Media Ip Address can be configured as either an IPv4 of IPv6 address (except for H.323 which does not support IPv6 addresses). Any IP address configured must belong to the IP Interface Group configured as the Media IP Interface Group for the trunk group. For additional details, see SIP over UDP and SIP over TCP.

Source Address Filtering

When enabled, incoming media packets which do not match the expected source IP address and UDP port are filtered out.

  • Disabled 
  • Enabled (default)

Media Addr Type

The Media Address Type attribute determines the type of IP address used in the offer.

  • IPv4 – IPv4 address is selected from the media interface group for the SDP, or else call fails.
  • IPv6 – IPv6 address is selected from the media interface group for the SDP, or else call fails.
  • IPv4 and IPv6 – Both address types are allowed. Additional configuration options are available using anat parameter above.
  • Match Sig Addr Type – (default) Selects media IP based on the signaling IP version used for the call. When SIP Peer IP is known, media IP will match the same. When SIP Peer IP version is unknown, media IP matches the IP version used for signaling (for example, IPv4 first and IPv6 for resolving an FQDN) for call attempt. When “Signaling IP version mismatch” results in the collision crank back, the  SBC reselects media IP to match new signaling IP version.

The anat parameter is only available when IPv4 and IPv6 option is chosen.

The ice parameter is available only when IPv4 and IPv6 option is chosen and the services Nat Traversal option is set with Ice Support.

Recordable

Enable flag to support media recording of RTP stream to an external recording device on this SIP trunk group.

  • Disabled (default)
  • Enabled

Sdp Attribute Selective Relay

Enable this flag to control the selective relay of unknown SDP attributes at session level and attributes from core audio stream.

  • Disabled (default) – Session level attributes are dropped. Media stream level attributes are dropped unless from a non-core stream.
  • Enabled – All qualified session level and media stream level attributes are relayed (including attributes from a= and b= lines).
Msrp

Enables the MSRP payload relay over TCP connections that will be setup on a successful negotiation of MSRP SDP attributes.

The options are:

  • Enabled (default)
  • Disabled
Omr Allowed

The options are:

  • Enabled – If this parameter is enabled, OMR procedures are applied to all the calls.
  • Disabled (default) – If this parameter is disabled OMR procedures are not applied to any call. This parameter is disabled by default for backward compatibility.
  • Ravel Call Only – If this parameter is set to ravelcallOnly, OMR procedures are applied only to ravel calls.

Note

This configuration is not supported on ERE and is intended for use only with an external PSX.


Omr Primary Realm

Use this parameter to choose which Address Context realm name to use as the primary realm for this SIP trunk group.

Note

This configuration is not supported on ERE and is intended for use only with an external PSX.

Advertise Audio Only

When enabled SBC sends only the main audio/image stream in the SDP offer. The options are:

  • Enabled
  • Disabled (default)
Lync Share 

This flag supports Lync/Desktop sharing application media streams. The options are:

 
  • Enabled: When enabled, lyncShare media streams are allowed for the specified Trunk Group.
  • Disabled (default): When disabled, lyncShare media streams are not allowed for the specified Trunk Group.

Refer to Configuring SBC and LYNC in Media Environment for configuration details.

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

 

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