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Table of Contents
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Up until software version 10.5.2, the IMG supports SIP-T/SIP-I for interworking between SIP and SS7 ISUP. A call that originates in the PSTN and is then Interworked into a SIP network places ISUP messaging into the SIP message body. When the call finally gets to its destination the ISUP information in the SIP body is extracted from the SIP message and placed back into its ISUP messaging so the PSTN can route the call. In software 10.5.2 a feature was added to allow the IMG to accept a SIP message which originally has no ISUP information in it and create a SIP-T/SIP-I message which has the ISUP information embedded in its SIP body. The procedure below will explain how to configure the IMG to accept the incoming SIP message and send out a SIP-T/SIP-I message.

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