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D-CSI is used in a similar way to the O-CSI. The main difference is the O-CSI has a TDP List which, when triggered, initiates a dialogue with the gsmSCF and gsmSSF. The D-CSI, on the other hand, always uses DP2 and it is this criteria associated with the DP that dictates which gsmSCF the SSF will initiate a control dialogue with. Thus by setting multiple D-CSI, it is possible to trigger a dialogue with one of a number of gsmSCF.

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