Submit to TN Asynchronously - FTP Client

I am relatively new to WM and TN.
We have been able to successfully set up TN partner profiles, TPAs and process X12 852 documents per requirement. One problem we are facing is with the client that submits the EDI to TN.

We are using FTP client that FTPs the EDIStream data to TN. This is holding control until the entire document is processed by TN and the Processing Rules. Sometimes if the document is large, the client disconnects from the server (Although the document itself is processed to completion).

Is there any way we can make the client to fire and forget instead of wait for the response to arrive???