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By default, if the IMG 2020 receives a cause code on the outgoing leg of a call, the received cause code will be interworked and that same cause code will be transmitted in a response to the incoming side. However, the IMG 2020 has the ability to manipulate the received cause code on the outgoing leg and transmit a modified cause code in the response to the incoming leg. This functionality is supported between any protocol supported on the IMG 2020. The examples below display the configuration needed to modify a received cause code coming from the SS7 protocol modify it and then transmit the modified code to the SIP protocol as a SIP Call Request Failure code.
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