RR,
I'm not trying to be a smart aleck here, but why are you taking it out on the JS Convert-A-Caller? That is a good piece of equipment. I have one myself, and love it.
The caller is not causing your problem with the beeping sounds. It is obviously coming from your CD player. Not sure why, as I've never used mine that way, but there are others here that have. I have seen this discussed previously, and you might try the seach function and see what you come up with. My guess is that it has something to do with the CD player selecton process.
Personally, I use an Rio 800 MP3 player, and it works like a charm. So will most any MP3 player. The Rio's are a rugged little rascal, and can be bought on EBay at very cheap prices. I've seen Rio 600's sell for as little as $20.00. With an MP3 player there is nothing to move in the system, and no skipping. Something to consider. I'm confident that some of these other people using JS callers will chime in too. Good hunting - Bill