Sender

A sender was a circuit in a 20th-century electromechanical telephone exchange which sent telephone numbers and other information to another exchange. In some American exchange designs, for example 1XB switch the same term was also used to refer to the circuit that received this information. The corresponding device in the British director telephone system was called a "director" and, in other contexts, "register".

A secondary meaning within the UK broadcast engineering community is as a synonym for broadcast transmitter.

See also

• communication source
• Director telephone system
• Panel switch
• Register signaling

References

Telecommunications
History	Beacon Broadcasting Cable TV Communications satellite Computer network Drums Electrical telegraph Fax Heliographs Hydraulic telegraph Internet Mass media Mobile phone Optical telecommunication Optical telegraphy Photophone Prepaid mobile phone Radio Radiotelephone Satellite communications Semaphore Smartphone Smoke signals Telecommunications history Telautograph Telegraphy Teleprinter (teletype) Telephone The Telephone Cases Television Timeline of communication technology Undersea telegraph line Videoconferencing Videophone Videotelephony
Pioneers	Edwin Howard Armstrong John Logie Baird Paul Baran Alexander Graham Bell Tim Berners-Lee Jagadish Chandra Bose Vint Cerf Claude Chappe Donald Davies Lee de Forest Philo Farnsworth Reginald Fessenden Elisha Gray Innocenzo Manzetti Guglielmo Marconi Antonio Meucci Alexander Stepanovich Popov Johann Philipp Reis Nikola Tesla Camille Tissot Alfred Vail Charles Wheatstone Vladimir K. Zworykin
Transmission media	Electromagnetic radiation Electrical cable Free-space optical communication Molecular communication Optical fiber
Network topology and switching	Links Nodes Terminal node Network switching (circuit packet) Telephone exchange
Multiplexing	Space-division Frequency-division Time-division Polarization-division Orbital angular-momentum Code-division
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