7.1. Specifying Automatic or Manual Sending of the Proceeding Message

In the NetTSC embedded stack implementation, during call setup, the Proceeding message was sent automatically. In the host based stack implementation, the application can configure if the Proceeding message should be sent manually by the application (using the gc_CallAck( ) function) or automatically by the stack.

This configuration is done using the gc_SetConfigData( ) function with the following set ID and parameter ID in the associated GC_PARM_BLK:

• GCSET_CALL_CONFIG
  • GCPARM_CALLPROC - Possible values are:
    • GCCONTROL_APP - The Proceeding message should be sent by the application
    • GCCONTROL_TCCL - The Proceeding message is sent automatically by the stack

The default is that the Proceeding message is sent manually by the application by issuing gc_CallAck( ). If the automatic option is selected, there may be performance issues at the receiving side.

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