The Morris electronic telephone exchange

Author(s):  
W. Keister ◽  
R.W. Ketchledge ◽  
C.A. Lovell
Keyword(s):  
2013 ◽  
Vol 10 (3) ◽  
pp. 47-54 ◽  
Author(s):  
Darrell A. Norris

In 1878, the first telephone exchange in the British Empire was put into service at Hamilton, Ontario. By 1891, the Bell Telephone Company of Canada had completed a long-distance network exceeding 6400 kilometres, including an unbroken link along Central Canada's "Main Street," between Quebec City and Windsor. The company's operations in 1891 embraced 22,000 subscribers and more than 200 exchanges. The spread of the long-distance network was halting at first, owing to the meagre capital resources of the company and the relatively poor return on investment given just a few thousand subscribers in the entire system. Also, much of the initial capital investment was quickly rendered obsolete, because of technical improvements in voice transmission over copper metallic circuits, which by the mid-1880s had begun to replace and augment existing long-distance links by iron wire. This research note discusses the development of the long-distance telephone network in Central Canada, its evolving pattern of telephone exchanges, the spread of telephone adoption, and the intensity with which the long-distance system was used in its formative phase. The research was completed under the auspices of the Historical Atlas of Canada/Atlas Historique du Canada.


1996 ◽  
Vol 07 (02) ◽  
pp. 115-128 ◽  
Author(s):  
ANDERS LANSNER ◽  
ANDERS HOLST

We treat a Bayesian confidence propagation neural network, primarily in a classifier context. The onelayer version of the network implements a naive Bayesian classifier, which requires the input attributes to be independent. This limitation is overcome by a higher order network. The higher order Bayesian neural network is evaluated on a real world task of diagnosing a telephone exchange computer. By introducing stochastic spiking units, and soft interval coding, it is also possible to handle uncertain as well as continuous valued inputs.


1994 ◽  
Vol 71 (1) ◽  
pp. 99-109 ◽  
Author(s):  
Patrick O'Neill

An ongoing issue in communications policy concerns the proper role of the local telephone exchange carriers in the provision of con tent. Historically, these regulated monopolies acted solely as content-neutral common carriers. This status is undergoing a dramatic change, as the telecommunications system becomes a conduit for mass communication services and as local carriers begin to face competition. The removal of the information services ban by the federal district court in 1991 was only one action of many in the past decade applying First Amendment principles, especially the recognition of editorial rights, to the telephone carriers.


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