Solution:

The male DB25P connector on the Red Sticker side is standard RS-232 DCE configuration,Straight Cable DB-25 cable between the PC comm. port DTE and the 422KDAK6 converter. Refer to the pin out in the top drawing at http://www.bb-elec.com/tech_articles/db25_db25_signal_directions.asp To connect to a DB-9 type at the PC, see the top drawing of the Modem Cable -Straight Conversion DB9 to DB25 at http://www.bb-elec.com/tech_articles/db9_db25_signal_directions.asp Pin 18 has a +12VDC output Pin 25 -12 VDC output The yellow sticker side, at the DB15P Male connector is: Pin 9 (TD A) TD - Pin 2 (TD B) TD + Pin 11 (RD A) RD - Pin 4 (RD B)+ RD + Pin 10 (DTR A) DTR - Pin 1 (DTR B) DTR + Pin 8 (GND) Signal Ground Pins 3, 5, 6, or 7 Regulated positive +12VDC input Pin 12, 13, 14, or 15 DC return input (ground)