MONTREAL – Quebecor Media's cable company Videotron was the first large Canadian MSO to offer voice over Internet protocol (VOIP) service to its customers and it is the first one to count half a million telephone subscribers. "Thanks to Videotron's cable telephone service, 500,000 clients can now communicate among themselves for free, from one end of the province to the other," boasts the press release. Videotron offers free long-distance calls between subscribers to its residential telephone service. "Videotron is aware that the more households it offers services to, the more it stimulates market competition," said company president and CEO Robert...