A FIX engine is middleware that sits between your enterprise and that of your business partners to facilitate the exchange of messages. The FIX engine manages the network connection, sends and receives FIX messages, and validates that messages conform to the FIX format. There are many FIX engines available; however, FIX Module only supports NYSE Technologies Appia engine. Therefore, only the Appia FIX engine is discussed in this guide.

For more information about the FIX protocol, visit http://www.fixprotocol.org/.