payments -- Need to define ACH payments with paymentech

Hi ,

We are upgrading from 11.5.10 to R12.2.3.

so in 11.5.10 , client using the processor model that handles both credit card & bank transfer(ACH - customer payments) .

now we are upgrading to R12.2.3. i want to use the same processor model for ACH customer(bank transfer payments).

for credit card we defined gateway model.

Did anyone having the ACH (bank transfer) set up document steps? please provide the detailed steps.

Thanks

Samba