IDOC to EDI scenario

Dear All,

need your help on how to configure and deploy a scenario for a IDOC to EDI (856)  .  I believe this is like "IDoc to X12 - > X12 to EDI" using AS2 adapter.  BASIS has configured the B2B addon installation and I am not sure about the EDI part in this scenario..

can you please inform what that the steps (A to Z) needs to be followed and would be great if example scenarios can be uploaded .

Thanks

Fernando