My fiance received an obscene and harassing telephone call yesterday. Upon hitting *69, we came up with the source of the call. A reverse-lookup on the number produces no results, so we tried dialing the number. However, when we call this number, we are hearing some type of communications handshake on the other end.

It's not a fax machine, as I have attempted to send a fax to it. I also tried connecting via HyperTerminal, but the handshake never completes there either.

Can anyone point me in the proper direction for beginning to determine the type of communications device on the other end of the line so that I can further investigate the source of the obscene telephone call?

I am especially concerned since the caller knew personal details about my fiance that mean he knows what she looks like. We have reported the incident to the police and to the telephone company, but they have both been less than helpful.

However, if you have the phone number that placed the call, the telco is able to determine who it belongs to and should share that with law enforcement.