reply to Athar
Re: [Cable] Cable activation backlog (Videotron, Quebec) It can take an hour or two before the modem gets activated at their end. When it is, it will stop cycling through its LEDs (assuming you have a DCM-475).
You can also use a computer, and access the modem's status page at 192.168.100.1. In my case, the status said "Access denied", until the modem was finally activated at their end, at which point I was no longer able to access the page, and Internet became accessible. For me that happened about 40 mins after the tech left.
There is no username/password involved with cable. Just a VL code to check your quota usage on their website.