My son is my tech support (he has a real business doing this, supports about 30 other physician offices) and turned me on to Mirth Connect .
We are looking to see if can implement for translating hospital HL7 files (no AC interface) to Quest Lab HL7 flavor.
We'll post our experiences.

Roger
(Nephrology)
Do the right thing. The rest doesn?t matter. Cold or warm. Tired or well-rested. Despised or honored. ? --Marcus Aurelius --