I found this when i seached at canada411.com
"From: Robert Hauver
Sent: July 27, 2001 2:16 PM
To:
procedure@crtc.gc.ca
Subject: Telemarketing experience
Beginning April 2001 I started to record calls where no caller identified himself. I received between 2 and 7 of these calls per day. I subscribed to Call Display and identified 3 repeat offenders, one of whom was Telespectrum at 1-905-322-5760. My residence number is 613-829-1959. I called Bell Canada with the 3 numbers and I believe they have terminated calling from these 3 numbers.
My comments are as follows:
l) I am forced to pay for Call Display to partially protect my privacy.
2) I continue to receive from 1 to 3 calls per day "Number blocked Name unknown" or "Number Unknown Name Unknown". I understand that certain cell phone calls are identified this way.
End of document."