Shaw Cable provide digital phone service in Vancouver city in 2006.
I got the information that they offer a new service to enhance your IP phone quality. This service is not shown publicly, even in their site. It can distinguish between data package and VOIP package. Then shaw give the VOIP package higher transfer priority. The IP phone conversation can get better quality almost without delay.
They charge $10 per month for it.
I ask the technician: Does the service can improve the IP phone quality enven it is provided by other IP phone provider? He said YES.
here is a link related to shaw internet usergroup