Payment Gateway Integration with UCES

Hi Experts,

We want to integrate Payment Gateway in SAP UCES 6.35.

I was going through the below SCN thread where it is mentioned that  payments in UCES are not synchronous unlike other Internet Payments which are real time.

Please can someone provide an insight on how we can implement Real time payments (synchronous) payments in UCES.

Is there any SAP standard provision for the same or do we have to make enhancements or write our own custom code for the same.

BR,

Anurag