Editing Emergency telephone number (section)

== Operator-assisted dialing ==
When an emergency happened in the pre-dial (or "manual") telephone era, the user simply picked up the telephone receiver and waited for the operator to answer "number, please?". The user then responded with "get me the police", "I'm calling to report a fire", or "I need an ambulance/doctor". Even in large cities, it was seldom necessary to ask for these services by number.

In small towns, operators frequently provided additional services, knowing where to reach doctors, veterinarians, law enforcement personnel and firefighters at all times. Frequently, the operator was also responsible for activating the town's fire alarm.

When manual switching systems began to be replaced by automatic, or "dial" systems, there was frequently concern among users that the very personalized emergency service provided by manual operators would be lost.

Because numbers were different for every exchange, callers either had to dial the operator or look up the telephone number. This problem was at least partially solved in Canada, the UK, and the US by dialing "0" for the local assistance operator in case of emergency, although faster service could be obtained if the user dialed the full number for the Police or Fire Department. This system remained essentially unchanged throughout most of North America until the 1970s.