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When making a call there are instances where the calling party's name is not in the incoming IAM message. For these instances, the TCAP CNAM Queries for ISUP to SIP Calls feature was developed. When this feature is configured/invoked the IMG 2020 will examine the incoming IAM and determine whether to do a CNAM Database lookup to determine the calling party's name. Once the calling party's name is found in the CNAM database it will be inter-worked into the From: header in the SIP INVITE message. The TCAP CNAM Database Queries feature gives the called party or application the ability to access the Calling Parties number if needed. This feature supports TCAP ANSI and is supported on calls going from SS7 to SIP. Refer to the TCAP/CNAM Configuration information below on how to configure using the Web GUI application.
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