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As described in Feature F-5230, the H.223 and H.245 protocols are used between multimedia endpoints over a circuit switched network. These protocols are utilized after a successful call between two endpoints that indicates the call is for multimedia. Feature F-5698 gives the IMG the ability to detect an incoming SS7/ISDN multimedia call based on a specific octet contained in the SS7/ISDN setup message. If the call is considered an audio call, the message will be interworked as a normal ISDN/SS7 to SIP call. If however, the call is considered a multimedia call, a proprietary SIP Header can be added indicating it is a multimedia call and the added header will be interworked to the SIP side. The feature is enabled through a new header added to the SIP Headers object. Refer to the information below.
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Before being able to configure the IMG to interwork the SIP Proprietary header between SS7 or ISDN and SIP, the following objects must first be configured. Configure these initial objects before proceeding to the procedure below.
IMG 1010 - Configuring SS7 Signaling - 10.5.1 (for SS7 to SIP call flow)
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Right click on the IMG Name object (Physical Node) and select New Signaling. The Signaling object is a container object for all signaling on the IMG. No more configuration is needed within this object. Refer to IMG 1010 - Signaling Object topic for more information on this object
Right click on the Signaling object and select New ISDN. A ISDN D-Channels object will get created. This is a container object and no configuration is needed here. Refer to the IMG 1010 - ISDN Signaling Pane topic for more information on this object.
Right click on the ISDN D-Channels object and select New ISDN D-Channel. Configure the D-Channel in this object. Refer to the IMG 1010 - ISDN D Channel topic for more information on configuring this object.
Right click on IMG EMS and select New Routing Configuration. A Routing Configuration Pane will appear. Refer to the IMG 1010 - Routing Configuration Object topic for more information on this object.
Right click on Routing Configuration and select New Channel Groups. A Channel groups container object is created. This object will allow multiple channel groups to be created beneath it. Refer to the IMG 1010 - Channel Groups topic for more information on this object.
Right click on the Channel Groups Object and select New Channel Group. A Channel Group Object will appear. Enter a name for this channel group and set the Signaling Type to ISDN. In this example, the channel group was labeled ChGrp_ISDN. Refer to the IMG 1010 - Channel Group topic for more information on configuring this object.
Right click on the ISDN Channel group just created and select New ISDN Group. Select a D-Channel from drop down menu in the ISDN D channel field. Refer to the IMG 1010 - ISDN Group topic for more information on configuring this object.
Right click on the ISDN Group object just created and select New ISDN Circuits. Select which spans/channel will be utilized in this ISDN circuits group. Refer to the IMG 1010 - ISDN Circuits topic for more information on configuring this object.
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Right Click on the Profiles object and select New SIP SGP. Once SIP SGP pane is created, change the SIP Profile ID field to something other than 0 by selecting a different ID from the drop down menu. This will allow user to edit the SIP SGP Profile. Refer to topic for more information on configuring this object.
Right Click on the SIP SGP Profile object and select New SIP Headers. In the SIP Headers object that appears select one of the choices in the drop down menu of the field X-Dialogic Multimedia Call. In this procedure, Multimedia call and Audio call was selected from drop down menu. See screen capture below. Refer to topic for more information.
Create SIP Signaling Stack
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Right click on the Signaling object and select New SIP. Refer to the IMG 1010 - SIP Signaling Object topic for more information on configuring this object.
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Right click on Channel Groups object created earlier and select New Channel Group. Set the Signaling Type field to SIP and enter a name for this channel group. Refer to IMG 1010 - Channel Group topic for more information on configuring a SIP Channel Group.
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Right click on IMG EMS and select New External Network Elements. No configuration is accomplished here. The External Network Element pane is a container object to multiple external entities in the network. Refer to IMG 1010 - External Network Elements topic for more information.
Right click on the External Network Elements object and select New External Gateways. Again, no configuration is accomplished here. Refer to IMG 1010 - External Gateways object for more information.
Right click on External Gateways object and select New External Gateway. Enter a name to identify this gateway, modify the Gateway Signaling Protocol field to display SIP, and enter an IP address in the Gateway IP Address field.
Within the SIP Profile field of the External Gateway object, select the SIP SGP created above for the X-DLGCMultimedia: Data feature. See screen capture below. Refer to the IMG 1010 - External Gateway topic for more information.
Point SIP Channel group to gateway created
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Right Click on the SIP Channel group created above and select New IP Network Element. In the IP Network Element field, select from drop down menu the gateway created above. Refer to the IMG 1010 - IP Network Element topic for more information on this object. See screen capture below
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