telegraph circuit

telegraph circuit

[′tel·ə‚graf ‚sər·kət]
(communications)
The complete wire or radio circuit over which signal currents flow between transmitting and receiving apparatus in a telegraph system.
References in periodicals archive ?
Through line-by-line scanning of a message written with special ink on a metallic surface, electrical impressions of the original and a telegraph circuit could be used to transmit the information at a distance.
In the beginning the "hotline" was not a telephone, but rather teletypes and a duplex wire telegraph circuit.
In what seems to prefigure the inexorable rise of the mobile phone and global communication by at least seven decades, he added: "Wireless telephone and telegraph circuits will span the world.