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Telephony, Switchboards Jones 50-line switchboard, 1879

Telephony, Switchboards Jones 50-line switchboard, 1879
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Not available to clients invoiced in the UK
Largest available format 2728 × 3504 px 2 MB
Dimension [pixels] Dimension in 300dpi [mm] File size [MB] Online Purchase
Large 2728 × 3504 px 231 × 297 mm 1.9 MB
Medium 797 × 1024 px 67 × 87 mm 1.3 MB

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IMAGE number
UIS5069135
Image title
Telephony, Switchboards Jones 50-line switchboard, 1879
Auto-translated text View Original Source
Artist
Unknown
Location
Science Museum, London, UK
Medium
object
Image description

Telephony, Switchboards Jones 50-line switchboard, 1879. Detail of keypad. This American plug and cord switchboard was made by Jones Bros of Cincinnati, United States and installed in Norway by the Bell Company in 1880. The first switchboards had no more than 50 lines per board as this was the most one operator could control. Exchanges with more than 50 subscribers had to have a number of switchboards and operators. If a caller required a number which did not operate from the same switchboard, the two operators had to confer first to see if the required number was free, and then make the exchange. The increase in use made this situation unworkable in the early 1880s and it was only resolved with the introduction of the multiple switchboard in 1884. ©SSPL/Science Museum

Photo credit
SSPL/UIG / Bridgeman Images
Image keywords
19th century / USA / North America / America (continent) / north america / numeral / USA / invention / thing / phone / telephone exchange / communication / telephone operator / U.S.A / photography / Norway Norwegiant

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