Oracle Cash Management is an open integrated solution for managing your company/enterprise-wide cash cycle. In addition to seamlessly integrating with other modules from Oracle E-Business Suite, Oracle Cash Management's open interfaces allow company to easily integrate with external systems, giving timely access to global cash information . Companies those practicing and prepares cash forecast, they can project cash flows from Oracle General Ledger, Oracle Receivables, Oracle Payables, Oracle Payroll, Oracle Projects, and Oracle Purchasing. The Forecasting Open Interface allows you to also project cash flows from external systems. With the Forecasting Open Interface's distributed database support, you can generate a forecast that combines relevant transaction information from both local and remote databases which may be across region .
Oracle Cash Management lets you automatically or manually record and reconcile bank statements, matching against system transactions using rules and tolerance levels. You can review and correct any import validation or reconciliation errors online. Oracle Cash Management can automatically reconcile correcting statement lines against error statement lines and provide an audit trail for verifying correction of bank errors.
Fig 1: Cash Managment
Oracle Cash Management supports electronically downloading of bank statements from the bank. The Bank Statement Loader program supports standard formats such as BAI2 and SWIFT940, as well as user-defined formats. Bank statements are reconciled with payments in Oracle Payables and Oracle Payroll, receipts in Oracle Receivables, and journal entries in Oracle General Ledger. You can also reconcile with payments and receipts from other systems, including settlements from Oracle Treasury, using the Reconciliation Open Interface. The Reconciliation Open Interface is extensible, executing your custom logic when reconciling external transactions.
If you are implementing, you can refer these post that will be great help for you.
- Period Close Processing Checklist -> R12 Cash Management 
- R12 : Cash Management Period Closure 
- R12 : Cash Management & SLA 
- R12 :Bank Statement Reconciliation 
- XML based statement for Cash Management 
- Implementing SWIFT MT's within EBS
- Managing Cash , EBS and SWIFT