Do police officers use codes on their walkie talkies? If not, why don't they just say 'I need backup at this location'? Or does this happen sometimes without being coded as such? -
![It's Over and Out and 10-22 on Codes Found in Piece of Ephemera from Weaver's Liquors. - Window on Cecil County's Past It's Over and Out and 10-22 on Codes Found in Piece of Ephemera from Weaver's Liquors. - Window on Cecil County's Past](http://cecilcounty.files.wordpress.com/2012/02/cecil-county-fire-ten-codes-356.jpg)
It's Over and Out and 10-22 on Codes Found in Piece of Ephemera from Weaver's Liquors. - Window on Cecil County's Past
![Medical Incident Counts by Priority Dispatch Codes, Delineated by Priority | Download Scientific Diagram Medical Incident Counts by Priority Dispatch Codes, Delineated by Priority | Download Scientific Diagram](https://www.researchgate.net/publication/342897805/figure/tbl2/AS:912832656834562@1594647673142/Medical-Incident-Counts-by-Priority-Dispatch-Codes-Delineated-by-Priority.png)