Generally the home owner does the fishing of walls, the installer may or may not do this for you since a short run. You can always prep it and have the holes ready with a pull wire for the installer.
@Jurmalurm The telus tech dos not do power wiring that is up to you. When you wire the outlet put in 4 outlets ( ONT - MODEM ROUTER - BATT BACKUP FOR PHONE IF NEEDED - AND WHAT EVER ELSE )
The user is talking about the alarm panel
If it is an interior wall, they should fish the wire from the point of installation to an outlet directly below, at least they did for me.