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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

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 Group Id


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

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


• 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.

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.

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.

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).

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

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.

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

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

• Enabled

• Disabled (default)