05/16/2002	RS-41D	ECN-PH3-0001	Manual Changes and Grounding on the unit
09/12/2002	SD-2	ECN-PH3-0002	Increasing the delay of silence sencing to greater than 50 Seconds
06/17/2003	S-402A/S-201V/S-402AR	ECN-STD-0001	Firmware changes for the S-402A and S-201V Combination
06/26/2003	S-102A	ECN-STD-0002	Manual Corrections Dip Switch Settings
01/02/2004	VDA-ASI	ECN-PH3-0003	Correction for 220 VAC Operation