Carrier Systems on Long Distance Telephone Lines
- 1 October 1928
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in Transactions of the American Institute of Electrical Engineers
- Vol. 47 (4) , 1360-1387
- https://doi.org/10.1109/t-aiee.1928.5055151
Abstract
A previous Institute paper in 1921 gave a very complete résumé of the activities of the Bell System at that time in the development of multiplex telephone and telegraph systems using carrier-current methods. A new type of carrier telegraph system was subsequently described in an Institute paper. In the present paper the authors describe developments which have resulted in improvements ments in the carrier telephone art since that time. A new, so-called type ``C'' system is described in detail, together with suitable repeaters and pilot channel apparatus for insuring the stability of operation: the line problems are considered and typical installations pictured. The growth of the application of carrier telephone systems and their increasingly important part in providing long distance telephone service on open-wire lines are shown.Keywords
This publication has 27 references indexed in Scilit:
- High-Frequency Measurement of Communication ApparatusTransactions of the American Institute of Electrical Engineers, 1927
- Methods of Measuring the Insulation of Telephone Lines at High FrequenciesTransactions of the American Institute of Electrical Engineers, 1927
- Carrier-Current Communication on Submarine Cables Los Angeles-Catalina Island Telephone CircuitsTransactions of the American Institute of Electrical Engineers, 1926
- Production of Single Sideband for Trans-Atlantic Radio TelephonyProceedings of the IRE, 1925
- The transmission unit and telephone transmission reference systemsJournal of the A.I.E.E., 1924
- Practises in Telephone Transmission Maintenance WorkTransactions of the American Institute of Electrical Engineers, 1924
- Telephone Transmission Over Long DistancesTransactions of the American Institute of Electrical Engineers, 1923
- Physical Theory of the Electric Wave-FilterBell System Technical Journal, 1922
- Carrier Current Telephony and TelegraphyTransactions of the American Institute of Electrical Engineers, 1921
- The Design of Transpositions for Parallel Power and Telephone CircuitsTransactions of the American Institute of Electrical Engineers, 1918