Ok, so I was tuning around looking for analogue voice signals, and I tuned across this. I've heard it before, but never knew what it was. After looking at sigidwiki, I concluded that it's possibly something to do with railroads. It almost sounds like MDC-1200, but being used as a pager or something I'm not that familiar with railroads and their radio systems. Here's a video of me receiving the signal with sdr# and an RTL-SDR. Feel free to skip parts because I didn't edit it.
https://drive.google.com/file/d/0Bzibn8XTXFFgZk9pWmFmLVp4VEE/view
https://drive.google.com/file/d/0Bzibn8XTXFFgZk9pWmFmLVp4VEE/view