The Inter Operator Identifier (IOI) is shared between sending and receiving networks, service providers, or content providers. The orig-IOI
parameter is used by the originating network in the requests whereas the term-IOI
parameter is used by the terminating network in the responses.
As a P-CSCF, the SBC has the following abilities:
- Use the
orig-IOI
in the REGISTER requests only. - Include the
orig-IOI
in all the SIP requests and responses. While generating responses for any UE terminated requests, the SBC as a P-CSCF copies theorig-IOI
parameter received in the P-Charging-Vector header of the request to the P-Charging-Vector header of the response, and also includes aterm-IOI
parameter. Both theorig-IOI
andterm-IOI
parameters contain configured "Inter Operator ID" for the network.
The "Inter Operator ID" value associated with the Trunk Group towards the IMS core is used for the configuration.
Overview
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