Hi Arpan ,
wow the IBSC is the one that has the IP interface you can connect ur BTS trhough the internet, it is one of the latest ZTE BSCs, well I am using the 2.95 Version but the hardeware is the old BSC V2 with has TIC cards as the E1 interface I assume the OMM interface is the same, I activated the DR and added the DR indices in my performance to see how well it is working and so for it is so succesful it is working on all the sites with a congestion. I just put the tick over the checkbox on all my sites nothing else.