Phone rang, I answered and said "Hello" three or four times, but there was only dead silence.
How rude is that?  I tried to phone back but the line is always busy.
If I find out who these jerks are I'll let you know ...

i agree it's anoying .... don't call Bell, they can't do anything....fill out a complaint form with the CCTS they can!  http://www.ccts-cprst.ca/en/

I saw the caller id say sipp. I had no clue who this was so I let it ring. It rang 26 times. I think this is a new personal best for me.

I am on call 7/24 and the last thing I need are these types of calls. This weekend I have been phoned 5 times at all hours. When I answer the line is dead. When I phone back from my cell I get a busy signal. When I phone back from my land line I get an "Invalid Number" message.

There must be some way to put this guy out of business.

Same problem here.  Call received at 3:06 pm (Toronto, ON) it went to voice mail.  Dead air was the only "message"  Again also SiPPS appeared in Caller ID.