7.5.3 DISA/IVR objects

DISA

The DISA (Direct Inward System Access) routing object is used for automatic call acceptance by the PBX with a subsequent DTMF transfer option and playing of the selected tone. In conjunction with suitable routers, you can create the IVR structure. This routing object is particularly suitable for GSM and CO virtual ports where you have to answer incoming calls 'Manually' to give the calling user an opportunity to influence routing (these virtual ports do not support the dial-in option).

DISA Setting

To configure the DISA routing object use the Routing – Routing objects – DISA/IVR objects menu. A list of available DISA objects is displayed to the left. Add, delete or rename the DISA objects using the context menu. Moreover, the following three options are available:

  • Default – add three basic DISA modes – DISA_DEN, DISA_NOC, DISA_ME.
  • Update – update the existing default DISA services.

Select one of the DISA objects to display its configuration to the right. Strategy of the DISA objects is the first parameter to be configured. Select a strategy to determine the behaviour of the whole DISA routing object: Immediate or Alerting. Each strategy is assigned different DIS object parameters.

Immediate strategy

This strategy represents a common DISA concept. When a call comes to the port, it is answered, the DTMF detector is connected and the selected progress tone is played to the calling user. The numbers to be dialled are searched in the preset router. If no digit is detected before the timeout expiry, the call is routed to the selected default destination. The DTMF detector is active only in the period between the call answer and the timeout end.

 

Figure: Example of DISA Object Configuration with Immediate Strategy

 

The menu consists of the following parameters:

  • Tone – choose a suitable progress tone from the list. Add progress tones and messages of your own in the menu in Subs. 6.9 Progress Tones if desired.
  • Destination after DTMF dial  – set a router to be used for call routing via the PBX after the DTMF dial.
    • DTMF – set whether the DTMF detector should be allocated for the DISA. The count of DTMF detectors is determined by available hardware profile. If this option is disabled, the following three parameters are unavailable for configuration:
    • Timeout [s] – set the DIS object waiting time for DTMF. If you set '0', the whole message will be played and the call will be routed to the Default destination. In this case, do not select the endless message in the Tone  parameter.
    • Type – set the router type for call routing.
    • Id – select a router of the selected type.
  • Default destination – set the object to which the call will be routed if no DTMF dial is detected within the timeout.
    • Type – set the destination type for call routing.
    • Id – select a destination of the selected type.

Alerting strategy

This strategy represents a new DISA concept. When a call comes to the port, it is immediately routed to the preset Alerting destination and this destination is being alerted till the end of timeout. The timeout is set by the Timeout parameter. The call is not answered during the timeout and the calling user hears the alert tone from the network. After the timeout, the call is answered, but only towards the calling user, who is played the predefined progress tone. The Alerting destination is still being alerted. If the DTMF option is checked, the DTMF detector is connected after the timeout and remains active until the end of routing (answer, reject, etc.). The DTMF digits are transferred into the router selected in the Destination after DTMF dial option.

 

Figure: Example of DISA Object Configuration with Alerting Strategy

 

The menu consists of the following parameters:

  • Alerting destination  – set the alerting destination parameters.
    • Type – set the destination type for call routing.
    • Id – select a destination of the selected type.
    • Timeout [s] – set the timeout after which the preset message is played. The '0' selection is not suitable for the Alerting strategy since the call would be answered immediately, which is undesirable in this strategy.
    • Tone – select a message from the list of active progress tones of the PBX.
  • Destination after DTMF dial  – set a router to be used for call routing via the PBX after the DTMF dial.
    • DTMF – set whether the DTMF detector shall be allocated for this DISA object.
    • Type – set the router type for call routing.
    • Id – select a router of the selected type.