A typical manual telephone switchboard has a vertical panel containing an array of jacks with a desk in front. The desk has a row of switches and two rows of plugs attached to cables that retract into the desk when not in use. Each pair of plugs was part of a
cord circuit with a switch associated that let the operator participate in the call or ring the circuit for an incoming call. Each jack had a light above it that lit when the customer's telephone receiver was lifted (the earliest systems required the customer to hand-crank a
magneto to alert the central office and, later, to "ring off" the completed call). Lines from the central office were usually arranged along the bottom row. Before the advent of operator distance dialing and customer
direct dial (DDD) calling, a switchboard operator would work with their counterparts in distant central office to complete
long-distance calls. Switchboard operators are typically required to have very strong communication skills. Before the advent of
automatic exchanges, an operator's assistance was required for anything other than calling telephones across a shared
party line. Callers spoke to an operator at a central office who then connected a cord to the proper circuit in order to complete the call. Being in complete control of the call, the operator was in a position to listen to private conversations. Automatic, or dial, systems were developed in the 1920s to reduce labor costs as usage increased, and to ensure privacy to the customer. As phone systems became more sophisticated, less direct intervention by the telephone operator was necessary to complete calls. With the development of
computerized telephone dialing systems, many
telephone calls which previously required live operators could be placed directly by
calling parties without additional human intervention. As well as the people that were employed by the public networks, operators were required at
private branch exchanges (PBX) to answer incoming
calls and connect them to the correct
extensions. Today, most large organizations have
direct inward dialing, or
direct dial-in. Smaller workplaces may have an automated system which allows callers to enter the extension number of the called party, or a
receptionist who answers calls and performs operator duties. Depending on the employment setting, the roles and level of responsibilities of a PBX operator can vary greatly, from performing
wake-up calls in a hotel to coordinating emergency responses, dispatching, and overhead paging in hospitals. Operators employed in healthcare settings may have other duties, such as
data entry,
greeting patients and visitors, taking messages, triaging, or performing after-hours
answering service. Experienced, well-trained operators generally command higher salaries. ==History==