said by IGGY: You ISP number 1-877-380-2511 gives me a tone that makes me think the number isn't valid.
No it's valid. I can reach it using a POTS line.
Also the two numbers you gave me work fine. Strange that the Videotron one doesn't work. The problem isn't that I can't call my ISP because they have a local number and few regional numbers (of course!). This was only about testing my new Broadvox Direct service.