The surprising part is that you don't have personal radios. Imagine going to an incident and you get stabbed (hopefully it never happens). What do you do? Run outside and call from the ambulance? (assuming you can run) Use the house phone? (assuming they didn't spend the phone money on drugs and it's cut off) Run to the nearest telephone box (in a few years there won't be any) Crazy Mr Fawlty, crazy.