Send Routing Info for SM to another operator
How SMSC communicates with B party HLR in different network to send SRI request?
SMSC send SRI query to the HLR of other operator.
In order to reach the HLR of different operator you need to have the below SETUP
SMSC_A <—> MSCGW_A <——> MSCGW_B <—-> HLR_B
You don’t have to know MSCGW_B’s and HLR_B’s GT, you just have to know your MSCGW (MSCGW_A)’s GT
SAMPLE sccp pdu CAPTURED ON the MSU information Field
On SCCP PDU
Calling Party side
CgPA = SMSC’s GT
SSN = 8
RI = Route on GT
Called Party side
CdPa = MSCGW_A’s GT
SSN = 8
RI = Route on GT