Although not common, some PRI circuits enable authentication features on outbound calls using media played before the call is actually connected. A common example of such a feature is when the user must dial an account or access code prior to a toll call being allowed. Typically this is accomplished using early media cut-through, using one of three messages for media start; on-progress, on-alert, or on-proceed. The most common method is on-progress, but it is very important that the media point is matched by the provider and the PBX.
The Barracuda Phone System can be configured to provide a media channel for the cut-through messaging. If you need this feature enabled, contact your provider to determine if it is media cut-through and at which point it is enabled, and then contact Technical Support for assistance in enabling this feature.