have a Bogen RM350D and I connected a rca to 1/8 mini adapter wire from the KX-TD816 into my Bogen RM350D. I bought the wire at Radio Shack. How do I know if its a 2 conductor wire? I have programmed the music on hold source as music01 thru my Panasonic KX-T7431 and its not playing the music on hold when I put callers on hold. Any help is greatly appreciated. Thanks in advance