Carrier Current Pulsing over Toll Telephone Circuits

Autor: I. Molnar
Rok vydání: 1949
Předmět:
Zdroj: Proceedings of the IRE. 37:814-821
ISSN: 0096-8390
DOI: 10.1109/jrproc.1949.234617
Popis: 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 dial pulses extended, utilizing the carriers associated with the various voice transmission channels.
Databáze: OpenAIRE