Handset

A telephone receiver is the part of a telephone, which is used for listening to and speaking. In a narrower sense, the term " telephone receiver" inaccurate, therefore the common in the telecommunications name is also " handset " in Switzerland also Mikrotel because of the two components of the microphone and earpiece called the phone. In technical jargon, the handset is also called bone because of its typical shape. By lifting the handset hook switch is operated in the phone, it flows the loop current of a few mA, then in the switch it connects to the telephone network.

History

The handset with microphone and remote receiver (speaker) in one unit was presented by Mix and Genest as a novelty in 1877. Before this time the microphone was usually installed on a wall device firmly to the one Precht judge. In many payphones this funnel was arranged to be adjustable in height. The remote receiver (speaker) was equipped with a cord, and was held to the ear. In the early days the volume was still low and one had resorted by keeping two remote handset to the two ears in order to achieve a better understanding. Improvements were to dispense with the second remote handset, or he allowed that a second person was able to hear the conversation.

Concept and construction

When handset is a technical unit which serves as a support for the microphone and the earpiece. In general, it is connected by a spiral telephone cord to the telephone. In the English -speaking world, the handset is called the telephone receiver, " telephone receiver ". Of course, it also contains there a microphone that allows you to send sound signals.

Developments

Until the 1970s, carbon microphones were used as sound receivers, these were replaced due to the better voice quality by transducers with electronic amplifiers.

Due to the continuing miniaturization, it is possible to outsource parts of telephone technology in the handset. Cordless phones already contain substantial parts of the telephone, in particular the keyboard, but still require a base station to connect to the telephone network.

A mobile phone is in the form of a handset, but it is a full phone that can connect to respective telephone networks. An alternative to the handset is the headset, where the user has both hands free.

• Phone