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- Use the
orig-IOIin the REGISTER requests only. - Include the
orig-IOIin all the SIP requests and responses. While generating responses for any UE terminated requests, the
as a P-CSCF copies theSpacevars 0 product orig-IOIparameter received in the P-Charging-Vector header of the request to the P-Charging-Vector header of the response, and also includes aterm-IOIparameter. Both theorig-IOIandterm-IOIparameters contain configured "Inter Operator ID" for the network.
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The "Inter Operator ID" value associated with the Trunk Group towards the IMS core is used for the configuration. |
| Caption | 0 |
Figure
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1
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: Call Flow Depicting Insertion of Orig-IOI and Term-IOI at P
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=CSCF
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