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The ISUP Explicit Call Transfer (ECT) feature effectively utilizes the IMG 2020 resources during a SIP call transfer scenario. An inefficient utilization of resources is depicted in the following diagrams.
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Right click on the Dialogic object and select New Routing Configuration. The Routing Configuration object is a parent or container object and no configuration is needed here. Refer to the Routing Configuration topic for more information on this object.
Right click on the Routing Configuration object and select New Channel Groups. The Channel Groups object is a parent or container object and no configuration is needed here either. Refer to the Channel Groups topic for more information on this object.
Right click on the Channel Groups object and select New Channel Group. In the Name field, enter a Name that will identify this channel group or accept the default entry.
In the Signaling Type field select SS7_ISUP from the drop down menu. By selecting SS7_ISUP, the Channel Transfer field can now be modified.
To enable the ISUP Explicit Channel Transfer feature, select Enabled from the drop down menu in the Channel Transfer field. See screen capture below.
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Click on the Channel Groups object again. The Channel Groups object will have a yellow exclamation point in place of the icon indicating the configuration has not been sent to the IMG 2020. Click on the Download Resource Tables button and the new configuration will be sent to the IMG 2020.
Refer to the Channel Group object for more information on configuring the individual fields.
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ISUP ECT supports SS7 ITU97 only.
The IMG 2020 only support the "Service Platform Redirect and Transfer" scenario.
The IMG 2020 will only take on the role of the controller; the equipment requesting the ECT.
The IMG 2020 will not process ECT request from the SS7 side. They will be discarded.
ECT will be available only if the initial call was established between SS7 and a SIP device. The direction of the call is irrelevant.
ECT is triggered from the SIP call leg via the REFER method.
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