International SIP to SS7 NOA conversion

Symptom: 

International calls, for example with a prefix of 011, from SIP to SS7 need to send the correct SS7 Called Party Nature of Address, or NOA, in place of the prefix.

Reason for the issue: 

The SIP Invite method does not contain an NOA, so the incoming SIP Called Party Number must be analyzed, and based on that analysis, an SS7 Called Party Address and NOA created, or interworked, to pass the expected values to the SS7 network.

Configuring Dialogic Integrated Media Gateways to analyze, translate and send the correct Called Party Address: 

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1. Create an Incoming Translation Table containing on Table Entry, where the String to Match Property is Dialed Number, String Property is 011& and Dialed # Translation Property is &:
   

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2. Under table entry created in step 1, create an Advanced Dialed Number Parameters entry, with the Nature of Address Property configured to 004 – International:
   

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3. Assign the incoming translation table to the Incoming Translation Table Property of the incoming SIP channel group:
   

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 Example IMG 1010 Call trace: 
 
 

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