[nabs]

TELUS 50MBPS is only available to you if the SAC (Telephone Box: the ugly green colored street boxes) is very near to your house. That is where the internet is added to your phone line 90 percent of the time, due to attenuation only a install/service technician can tell you if you are truly eligible for the service using their test equipment while they are on site.
If you are about 2 blocks away from a SAC you should be eligible. The reason why loop bonding (see below) is not available in bigger concentrated areas is because the amount of (internet) ports are limited per sac box and most are in use.

Loop Bonding (2 copper pairs coming from the SAC box) is only for places where the SAC box is far away from the residence, and will only work in certain situations, and needs an Actiontec V2000 modem. This service is only available in remote areas with less amount of customers because there are ports to spare. One copper pair carries dialtone + internet, the second copper pair carries only internet.

Saturation does not matter with TELUS as each customer is assigned their own port(s). This is different from SHAW as they use a priority based node system.