TCAP:Receiving component portion

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The transaction component received (event) message is used by TCAP to notify and send received component to TCAP service user.


If TCAP detects any syntax or semantic error in the received component (for example, unexpected component type), then it builds and queues a reject component and it generates a local reject indication to the TCAP service user. Then, the TCAP service user can send a transaction component add (reject component) message and transaction data send messages to the peer TCAP/service user. Previous statements are not valid when an erroneous component was received in a unidirectional, end (ITU TCAP), or response (ANSI TCAP) message. When this occurs, the rejected component is not queued.


The component portion contains the following parameters:

  • TCAP userpart handle
  • TCAP transaction identifier
  • Component parameters
  • Component reject source indicator
  • Component specific parameters buffer
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