The FA2100 CVR part numbers 2100-1020-00 and 2100-1020-02 are direct replacements for the A100, A100A (PN 93A100-80, 93A100-83) and A100S (PN S100-0080-00, S100-0080-01) recorders.  No change in aircraft wiring or CVR mounting trays is necessary.  Please reference this L3 Communications document - click Here