While not complete relics (contrary to my 18yr old's opinion) we still have a land line AND a second phone # for our fax machine. And no, I can't remember the last time we sent or received a fax. The phone company must love us- we are throwing free money at them monthly.
Al, my husband and I both used those pagers when we were bike couriers back in the Stone Age. He went from there straight to radio dispatch (fancy!), but my employer moved over to the still modern, but much cheaper pager that a person could phone and leave a brief message on- and the pager would relay the message automatically. Our crew would spend much of our slow time calling the pager numbers from dispatch and saying terrible things in the hopes our victim was standing in an elevator or office and had forgotten to turn the volume down. We were frequently successful.