I worked on the "Extra Board" for the railroad. Basically, I was called in whenever someone else took off, called in sick, didn't show up or what ever at the last minute. Needing someone to fill that spot for that shift or train, they would call me. I was on call 24/7 and when I got that call, I had 90 minutes to be at work no matter where I was. If for some reason, the railroad tried to call me but was not able to reach me, I had what was called a "missed call" and it was MY FAULT that I missed the call. Y'all have "missed calls" all the time now but the railroad would fire us if we had one. Now, their idea of being "fired" was actually just being suspended without pay for up to 30 days. Anyway, unless I wanted to be tied to the house phone 24/7 waiting on a phone call from the railroad, I had to keep up with the latest technology.