Search results
Results From The WOW.Com Content Network
Telephone numbers listed in 1920 in New York City having three-letter exchange prefixes. In the United States, the most-populous cities, such as New York City, Philadelphia, Boston, and Chicago, initially implemented dial service with telephone numbers consisting of three letters and four digits (3L-4N) according to a system developed by W. G. Blauvelt of AT&T in 1917. [1]
The world's first telephone exchange took place on Jan. 28, 1878. ... Early phone numbers consisted of a two-letter abbreviated exchange name plus five digits, ... Copy editing by Paris Close.
Main page; Contents; Current events; Random article; About Wikipedia; Contact us; Donate
New York telephone exchange in the 1880s, with both men and women as operators Paris telephone exchange, ... a very good memory for names, and the ability to handle ...
1882: A telephone company—an American Bell Telephone Company affiliate—is set up in Mexico City. 14 May 1883: The Adelaide exchange was opened, with 48 subscribers. [15] 7 September 1883: The Port Adelaide exchange was opened, with 21 subscribers. [15] 4 September 1884: Opening of telephone service between New York and Boston (235 miles). [23]
The four largest cities (New York, Chicago, Philadelphia, and Boston) used seven digits. In New York, for example, "PENnsylvania 5000" became PEN-5000 and later PEnnsylvania 6-5000, dialled PE6-5000 or 736–5000). New York used the 3L-4N format from 1920, when dial telephones were first introduced there, until 1930, when it switched to 2L-5N.
Second Avenue exchange, NYC, site of the 1975 New York Telephone Exchange fire. A central exchange is almost always a single point of failure for local calls. As the capacity of individual switches and the optical fibre which interconnects them increases, potential disruption caused by destruction of one local office will only be magnified.
The list of top 10 baby names shouldn’t be all too surprising, the Health Department said, with most appearing on the list in the past few years.. Sofia, for example, crawled its way into the No ...