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Table of Contents
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Overview:

Feature 1580 adds to the IMG the ability to accept an incoming SIP NOTIFY request (outside of a subscription) which has the parameters Event type = message summary and Content Type = application/simple-message-summary and interwork these messages into an SS7 network using TCAP messaging. SIP uses the SIP Specific Event Notification (Notify) as a mechanism to transport the MWI message through IP and the IMG then inter-works the Notify message along with its Event Package Name "simple-message-summary" to the SS7/Outgoing side. The IMG then receives a response from the SS7 network and inter-works this response to the SIP network and sends the response out in the 200 OK message. This feature supports RFC 3842 section 5.2 only. This feature was initially added in software version 10.5.2 but was supported using the ANSI protocol only. In software version 10.5.3 the MWI functionality for ITU was added. For more information on this feature, see Related Topics below.

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