First Technology

The first technology used to communicate between police officers was the ratchet. Victorian, English police used the ratchet to call for help from any policeman in the area. In 1883 the police whistle was invented for a competition held by the London Metropolitan Police. The whistle was used to attract attention of the public and also attracted attention of other policemen. The ratchet and the whistle could only be used to attract attention, nothing else.