Dear, Nitin Goel!
1.There are Source local reference number and Called Party Addres mandatory parameters in SCCP Connection Request Message (CR).
2.There are Source local reference number and Destination local reference number mandatory parameters in SCCP Connection Confirm Message (CC).
3. After CC receiving the connection is considered as established. And Destination local reference number is mandatory parameter for all other messages inside this connection.
With regards, Pan.
To Sachin:
Dear, Sachin! I heard earlier about Bat-Man and Spider-Man. But about BTS-MAN and BSC-MAN – for the first time 🙂