and Canada, as well as the original manual 'Freephone' service introduced by the British Post Office in 1960. Prior to the development of automated toll-free service many telephone companies provided a manual version of caller free service.Įxamples of operator-assisted toll-free calling include the Zenith number introduced in the 1950s in the U.S. The operator had to secure acceptance of the charges at the remote number before manually completing the call.Ī few large businesses and government offices received large numbers of collect calls, which proved time-consuming for operators. Originally, a call billed to the called party had to be placed through a telephone company operator as a collect call. The features of toll-free services have evolved as telephone networks have moved from electro-mechanical call switching to fully computerized stored program controlled networks. 4 Universal International Freephone Service.
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