Successful incoming call (exchange data link)

This section describes the sequence of events during setup of an incoming call.

Figure 1. Exchange data link: successful incoming call
The graphic is a very simplified representation of the process described in detail in the next section.

Description of flows

The flows shown in Figure 1 are as follows:

  1. An incoming call is indicated by the network using channel associated signaling.
  2. The network sends the call information over the exchange data link.
  3. The signaling process notifies Blueworx Voice Response of the call information. The signaling process creates an SL_CALL_SETUP_IND primitive, and sends it to Blueworx Voice Response using the sl_send_indication() subroutine call.
  4. The call is answered using channel associated signaling.
  5. Blueworx Voice Response uses the call information contained in the SL_CALL_SETUP_IND primitive to set the system variables that contain the called number and the calling number. These are System : Call info : Called Number (SV185) and System : Call Info Calling Number (SV186).
  6. The system variables are used to select which state table is used to answer the call. The values of the system variables are also available to the state table for its own use.
Parent topic: Example signaling flows