Dynamics AX 7 and EDI

Hello,  My company is moving from a non-AX ERP system to AX 7.  We're read about spreadsheet imports, XML, Transformation,  data load, and vendors such as Data Masons.  We were not planning to replace our current EDI approach until a later phase. We have a translator in house, and use mostly inbound 850 PO, outbound 855 PO acknowledgement, 856 Advanced Ship Notice, 810 Invoice, and 211 Bill of Lading. 

 I would like to find out your suggestions for  loading / import/ export EDI data with AX7.  Are there pre-build staging tables that already interact with AX?    Is there a how-to article or overview or steps to follow that you could recommend for AX7 EDI?    

Thanks