Accession Number : AD0430081


Title :   TRUNK TERMINAL TELEGRAPH AND DATA TRANSMISSION SYSTEM,


Corporate Author : ITT FEDERAL LABS NUTLEY NJ


Personal Author(s) : Place, H ; Saldutti, A ; Eden, B


Report Date : Jul 1961


Pagination or Media Count : 135


Abstract : A number of high-speed data transmission equipments (data modems), which were in the development and early test stages eighteen months ago, are now available in the industry. Several modems have proved reliable and practical when operated at signaling rates in the order of 2400 bits per second. Characteristics of telephone transmission line parameters and certain vagaries of the telephone network itself are still restricting low-error, high reliability performance at signaling rates over 3000 bits per second. This report, which surveys the progress made during the past eighteen months in data modem development and manufacture, covers: data modem design concepts and modem selection considerations; detailed equipment descriptions covering ten leading data modems; data modem error performance test results; ancillary data transmission equipments; and an updated data transmission bibliography. (Author)


Descriptors :   *TELEPHONE EQUIPMENT , *RADIO EQUIPMENT , FEASIBILITY STUDIES , DATA TRANSMISSION SYSTEMS , DATA TRANSMISSION SYSTEMS , ERRORS , PERFORMANCE(ENGINEERING) , MODULATION , DETECTION , TRANSMISSION LINES , NOISE(RADIO) , TELEGRAPH EQUIPMENT


Distribution Statement : APPROVED FOR PUBLIC RELEASE