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The dialogTransparency flag under the Zone object passes dialogs transparently for SIP messages processed in that specified zone. If dialog transparency is disabled, the SBC translates the dialog identifiers in the Target-Dialog header received in INVITE and REFER messages and sends the Target-Dialog header with translated dialog identifiers on the other leg. If dialog transparency is enabled, Target-Dialog header translation is not performed. However, the header is transparently passed if configured in transparency profile.

The dialogTransparency flag must be enabled on both ingress and egress zones because if the flag is only enabled on one zone, all calls and messages are rejected. In this situation, the sonusSbxDialogTransparencyMisConfiguredNotification alarm is raised on the zone in which the flag is disabled.

Note

The following features are not supported by the SBC when Dialog Transparency is enabled:

  • Support of local handling of REFER (REFER relay is supported)
  • Late media support for downstream forking (when both downstream forking and dialog transparency are enabled 
  • Dialog Transparency support in REGISTER
  • NICE recording call flows
  • GW-GW support

Info

For feature functionality, please see Dialog Transparency.

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.

Command Syntax

% set addressContext <addressContext Name> zone <zone Name> dialogTransparency <disabled | enabled>   

Command Parameters

Zone Dialog Transparency Parameters

 

Parameter

Length/Range

Description

zone

1-23

The name of the zone. You can configure signaling, media, and control for a zone in the address context.

Note
Zone name is unique across all address contexts.

dialogTransparency

N/A

Enable flag SBC to send "Call-ID", "From" tag, and "To" tag transparently in the outgoing SIP message.

  • disabled (default) – SBC translates the dialog identifiers in the Target-Dialog header received in INVITE and REFER messages and sends the Target-Dialog header with translated dialog identifiers on the other leg.
  • enabled – Target-Dialog header translation is not performed. However, the header is transparently passed if configured in transparency profile.
Note

This flag must be enabled in both the ingress and egress zones. Otherwise, the sonusSbxDialogTransparencyMisConfiguredNotification alarm is raised on the zone in which the flag is disabled.

Note

Before enabling Dialog Transparency in a zone, ensure all sipSigPorts in that zone are first disabled.

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