I have a UNIDEN DEC 6.0 CORDED PHONE WITH 3 CORDLESS HANDSETS. I THINK THE MODEL IS EITHER 79HF OR E 209700. I LOST THE MANUAL. IT IS ABOUT 5 YEARS OLD. THE PROBLEM I HAVE IS THAT THE RECEIVER ON THE BASE UNIT DOES NOT WORK.. I HAVE TO USE THE HANDSFREE TO MAKE OR ANSWER A CALL. COULD YOU PLEASE SHED SOME LIGHT ON THIS FOR ME? THANK YOU PAUL SLIVANIK: paulssliv@gmail.com