Question about how Shaw internet travels to my house

I live in a old (1950's) neighborhood in Edmonton and to my knowledge all I have for comms is a couple of twisted copper pairs running from a telephone pole in the back ally. They currently provide me with 50mbps DSL through telus. I do not have any fiber lines run yet. Shaw says I'm eligible for 150mbps down and I'm just wondering what they would actually use to provide that service. Do they use the copper?