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IMPORTANT

Ribbon recommends using the Transparency Profile to configure transparency on the SBC Core for new deployments, as well as 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 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 the

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

Use the drop-down lists 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 SBC will transmit 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 to attach to this Trunk Group. To create a Dtls Profile, refer to Security - Dtls Profile.

Direct Media Allowed Behind Napt

 If enabled, the SBC attempts to set up a direct-media call for endpoints behind a NAT.
  • Disabled (default)
  • Enabled

Direct Media Anti Trombone

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

  • Disabled (default)
  • Enabled

Direct Media (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 the Direct Media Allowed flag is enabled for the same call, 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.

Multiple Audio Stream Support

This option determines whether the SBC processes multiple audio m-lines, or a combination of audio and image m-lines, in SDP. The options are:

  • Disabled (default)
  • Enabled
Disallow Srtp Stream

This flag determines whether the SBC forwards SRTP streams on egress when they are received in incoming SDP, or it sets the port to zero, thus disabling the SRTP stream. Multiple audio m-line support (Multiple Audio Stream Support) must be enabled before you can enable this parameter. The options are: 

  • Disabled (default)
  • Enabled

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 the SBC includes a direction attribute line as defined by the 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

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 the Media IP Address parameter.

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.

Default = 0.0.0.0

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 the SBC uses in an 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 the Anat parameters. Refer to Media - Anat.
  • Match Sig Addr Type – (default) Selects media IP based on the signaling IP version used for the call. When the SIP peer IP type is known, the media IP will match. When the SIP peer IP version is unknown, the media IP matches the IP version used for signaling (for example, IPv4 first and IPv6 for resolving an FQDN) for the call attempt. When a “Signaling IP version mismatch” results in a collision crank back, the SBC re-selects the media IP to match the new signaling IP version.

The Anat parameter page is only available when the IPv4 and IPv6 option is chosen.

The Ice parameter page is available only when the IPv4 and IPv6 option is chosen and the Services NAT Traversal option enables Ice Support. Refer to Services - Nat Traversal

Recordable

Enable this 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 the session level and attributes from the 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 – when selected, 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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