TCAP CNAM Database Queries
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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Right click on the Channel Groups object and select New Channel Group. In the Name field, either accept the default name entered or enter a name that will identify this specific Channel Group.
Select SS7_ISUP from the drop down menu in the Signaling Type field. For more information on configuring the SS7 Channel Group refer to Channel Group topic.
Right Click on the SS7 Channel Group created and select New Circuit Group. As described in the Configure the SS7 ISUP Group and Circuit Group (CICs) section above, select the node and DS-1'S/DS-0's that will be used for this circuit group. The selections made should mimic the selections made in the section above. Refer to the SS7 - Circuit Group under Signaling topic for more information on this object.
Click on the Channel Groups object which will now have a yellow exclamation point displayed. Click on the Download Resource Tables button and the SS7 Channel Group configuration just created will be sent to the IMG 2020.
Configuring the CNAM feature has been achieved. Below is screen capture of the Routing Configuration directory tree when finished configuring.
