I work at a walmart, and just wanted to mention a few things i've noticed about our paging system. The primary thing is that there is apparently no way to hang up someone else's page. Quite often, some moron keeps dialing the page extension, and then leaving the phone off the hook. It's apparently an associate who doesn't like music. You hear random noises on the overhead, and the music cuts in for 2 seconds every 5 minutes. To hang it up, apparently someone has to go to every phone in the store, making sure they are hung up, until they find the one that's paging. Seriously, what the hell? You'd think that someone would have fixed this in every store... Oh, and when the paging system is broken, i have to randomly call extensions and walk to find people. what a pain.
Additionally, I've noticed that our paging is not done with an extension, but with a code starting with #. I'm assuming that this is either to make it non-transferrable, due to pranks, or to make it noticable when people ask for transfers, due to pranks.