"NX2C4C.eds" is the EDS file to automate the configuration of the AMCI Nexus LDT Interface, the NX2C4C. 
"NX2C4C.ico" is the associated icon file for the EDS.  

 
Instructions for using any of these files can be found in the Nexus Digital Interface Specifications revision 1.1.  A copy of the Microsoft Word document with these specifications is located on the disk that was shipped with all of the versions of the Nexus Digitial Inerfaces listed above.  