Zobrazeno 1 - 10
of 15
pro vyhledávání: '"12-channel carrier system"'
Publikováno v:
SPIE Proceedings.
Abide by the design principles of mine intrinsically safe circuit, according to the need of underground communication in coal mine, the paper proposed a design scheme of DC carrier telephone which can dial. The design circuit of the telephone is intr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cf59d32f14013d384e09068ad320c598
https://doi.org/10.1117/12.2217510
https://doi.org/10.1117/12.2217510
Publikováno v:
IEEE Journal on Selected Areas in Communications. 3:300-311
A technique for transmitting voice and data on a conventional subsplit CATV network is described. The technique uses a variation on the carrier sense multiple access/collision detection protocol used in local area networks. A variation on this protoc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5398c2a2d1c6860dee487adba7580112
https://doi.org/10.1109/jsac.1985.1146197
https://doi.org/10.1109/jsac.1985.1146197
Autor:
I. Molnar
Publikováno v:
Proceedings of the IRE. 37:814-821
Recently developed multichannel carrier telephone systems, where calls are extended through automatic switching equipment, are described, together with performance data and application in commercial telephone service. Connections are established and
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::dd52b9f08fdb825b247b29ac0070389c
https://doi.org/10.1109/jrproc.1949.234617
https://doi.org/10.1109/jrproc.1949.234617
Autor:
Howard H. Smith
Publikováno v:
Transactions of the American Institute of Electrical Engineers. 69:1505-1512
IN THE LAST 30 years the rise of dialing requirements for local and long distance circuits, coupled with increased plant construction costs, has made the older types of carrier telephone systems obsolescent. It was found that there is a distinct fiel
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::eceb4c9a96f6ee3ac62b4400e1ccc2b6
https://doi.org/10.1109/t-aiee.1950.5060326
https://doi.org/10.1109/t-aiee.1950.5060326
Autor:
W. V. Wolfe, N. H. Slaughter
Publikováno v:
Journal of the A.I.E.E.. 43:377-381
While the use of power lines as the transmission medium for telephone currents is a comparatively recent development, the fundamental problems involved and the methods employed do not differ essentially from the somewhat older arts of multiplex or ca
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9ae6123ca61737323f25b469220fa639
https://doi.org/10.1109/jaiee.1924.6535991
https://doi.org/10.1109/jaiee.1924.6535991
Autor:
N. Koomans
Publikováno v:
Proceedings of the IRE. 26:182-206
An historical introduction reviews the initial long-wave telegraph circuit with the East Indies in 1923, the first short-wave telegraph circuit in 1925, and the inauguration of short-wave telephony in 1928, this being accomplished by means of the usu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f2c8b522266dc129af0675621618cca4
https://doi.org/10.1109/jrproc.1938.228369
https://doi.org/10.1109/jrproc.1938.228369
Autor:
J. L. Faherty, A. S. Howell
Publikováno v:
Transactions of the American Institute of Electrical Engineers, Part I: Communication and Electronics. 79:177-183
A new field telephone has been designed for use with the 4-wire electronic switchboards now being developed for the U.S. Army Signal Corps. This local battery instrument incorporates new features in systems applications. All telephone signalling to a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a04597d402e71850a5d93d43f81b1f40
https://doi.org/10.1109/tce.1960.6368566
https://doi.org/10.1109/tce.1960.6368566
Publikováno v:
Bell System Technical Journal. 7:564-629
Two previous papers before the American Institute of Electrical Engineers discussed the activities of the Bell System in the development of multiplex telephone and telegraph systems using carrier current methods. The present paper describes developme
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0bb4e868a735ab086bde808b44a6abc6
https://doi.org/10.1002/j.1538-7305.1928.tb01237.x
https://doi.org/10.1002/j.1538-7305.1928.tb01237.x
Autor:
O. A. Jorgensen
Publikováno v:
IEEE Transactions on Communication and Electronics. 82:643-647
The design considerations and development of a 12-channel carrier system for trunk and subscriber service are described. The dual-sideband AM (amplitude-modulated) system uses one modulation step only and has a grouped and a stacked frequency allocat
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5ab9708b56802541c578034cd766e127
https://doi.org/10.1109/tce.1963.6373278
https://doi.org/10.1109/tce.1963.6373278
Publikováno v:
Transactions of the American Institute of Electrical Engineers. 48:117-139
This paper describes a new carrier telephone system which is designed for use in the telephone plant as a substitute for open-wire line construction for circuits of shorter lengths than have been economical heretofore. This system, which is known as
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::90d2c62d2dacb3d167c890fb7fcc520d
https://doi.org/10.1109/t-aiee.1929.5055185
https://doi.org/10.1109/t-aiee.1929.5055185