Hi Ed, thanks for your quick reply.
My customer said that they asked Att if they could block the calls using the feature you suggested since they had the caller i.d. and Att told them they could only block local numbers. This happens to be a long distance number. Is Att wrong? (they usually are)
Also, even though the number appears to be from the states, the voice / accent they hear is from India or Pakistan. They were hoping the Nortel could block...but I guess not.

Even though they don't want to transfer the calls to 911, they just might transfer them elsewhere...just to get rid of them and annoy them and hopefully get them to stop.

I haven't tested this yet, but, who's caller id would show up if they transfer calls? Theirs or the perpetrator?

Thanks again!