I haven't had a home phone line in...5 years?
ie. landline. is that what they're called?
Yes. You're probably too young to remember this, but there was a time when cell phones didn't exist, and the only phones people had were landlines. If you were out and about, you had to find a "payphone," in which you could make short calls for a small fee. OR you could call collect- this would charge the party you're dialing for your phone call, in case you didn't have the money for the fee. Cool, huh?