can u explain call flow for roaming mobile to roaming
mobile?(both users are belongs to same state but staying on
roaming in different states)
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Answer Posted / govindhan
From the Location update info the A ( VMSC ) get the detils of the IN and an IDP is triggeted from a ( VMSC ) to IN then
IAM will be sent from A ( VMSC) to home GMSC which will do a SRI to HLR and gets the TCSI as a response .
Then the A GMSC will send a IAM to the B ( VMSC ) then the call will be established
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