Yes you can link as many users you want to one number. You need to be an admin to do that though.
You can choose if you want that it rings first to one person, then to another etc... Or you can choose that the call on that number rings on everyone's laptop/mobile at the same time, and who picks up the first gets the call.
To do that, just go on your number settings.
On the dashboard/admin on the website --> Click on the number you want to modify --> Then on "Call Distribution". There you can drag up and down the order of your teammates.
Or you can tick "Simultaneously on all teammates". Then it is going to call everyone at the same time.