We are a bank whose core banking system is not so advanced. It is still running on an AS/400 system. Credit Card system is are deployed on IBM mainframes. About 70 to 80 percent of the bank's core systems rely on IBM AS/400 and mainframes. The enterprise service bus is used in conjunction with MQ to break synchronous web service /TCP calls into asynchronous MQ calls and expose them a web services-based or API-based service for both internal and external customers.
We are using dedicated IBM power/pure-app servers to run IBM Integration Bus, IBM MQ, and WebSphere Application Server. These are the three components being used for the bank's enterprise service bus.