2.14 Diameter Message Copy

The DSR is able to copy certain Diameter Requests or Requests and Answers that transit the system. The copied messages can be used for book keeping/verification or for offering additional services such as sending a welcome SMS. The copied messages are sent towards Diameter Application Servers (DAS) which behave like RFC6733compliant standard Diameter servers.

The figure below provides a high level overview and shows the message processing sequence followed by DSR when performing Message Copy. It should be noted that the Message Copy is performed after the completion of the original transaction. In cases where a copy of the Answer message is to be copied, the Answer message is embedded into a Proprietary AVP and included in the copied message.

Figure 2-63 Message Copy Overview

The Message Copy function can be triggered by the following mechanisms:

• PRT based triggering.
• Using DSR’s mediation rules.
• DSR application triggering (for example: FABR).