5.2.1 A is a fixed subscriber or a mobile subscriber who may not benefit from OR

22.0793GPPService definitionStage 1Support of Optimal Routeing (SOR)TS

As the originating network does not have the ability to interrogate the HPLMN of the B subscriber, the normal call handling is applied.

Once the HPLMN of the B subscriber has the control of the call, the call may be optimised in the case of a forwarded call towards a party located in the Home Country of the B subscriber or in the country visited by the B subscriber.

NOTE: – A may be in any country.
– In the two following cases, the IPLMN is HPLMN-B.

Scenario 1: OR for Late Call Forwarding, C is in the same country as HPLMN-B

NOTE: Call records shown in the figure are only for information

Scenario 2: OR for Late Call Forwarding, C is in the same country as VPLMN-B

NOTE: Call records shown in the figure are only for information