How secure is call-blocking? I am up against a fiend who has insider information and can make my phone ring even when it is disconnected - at all hours of the day or night. The attack comes in the form of a single ring, which usually can disturb my sleep. The calls are untracable on my end. The phone company says there may be a bug in my apartment and wants a princely sum to find it. Somehow I doubt the fiend has gained unlawful access to my digs. So what kind of equipment am I up against? Is it worth giving call-blocking a try? The only thing that absolutely shuts down the phone so far is being on the Net - I have single line dial-up. Obviously I can't be on the Net all night; at least, I don't think I can manage that. Your assistance, please.