After we had VOIPo for a few weeks and had the number ported, I asked my wife if everything was all right since she talks on the phone far more than I do.

She said, it was great except that sometimes when she was on the phone she heard ringing on the line like she had placed a call.

I didn't think much about it until it happened to me and I figured out it was call waiting.

It doesn't matter to me if it rings or beeps as long as I know what it is, and now I do.