Receive EDIs via FTP


Have a quick question on receiving EDIs file via FTP.

We will have our trading partner to ftp EDI files to our AIX Box.
To process those EDI files, we will poll (either via File Polling Port
or a scheduled service) those EDIs file

The question is, what is the pros and cons of

  1. submit the polled EDI file to (thus will be recognized
    and processed by TN and calling our service based on processing


  2. directly submit the EDI file to our serivce (which will
    process the envelope, retrieve the transaction set, etc)

I can see the advantage of submitting to
as transactions will be logged in TN (participated in
conversation as well). But other than this, any other pros and cons (esp regarding Functional Acknowledgement processing