GB1193796A - Improvements in or relating to Data Transmission Systems - Google Patents

Improvements in or relating to Data Transmission Systems

Info

Publication number
GB1193796A
GB1193796A GB3444368A GB3444368A GB1193796A GB 1193796 A GB1193796 A GB 1193796A GB 3444368 A GB3444368 A GB 3444368A GB 3444368 A GB3444368 A GB 3444368A GB 1193796 A GB1193796 A GB 1193796A
Authority
GB
United Kingdom
Prior art keywords
voltages
control signals
signals
units
data
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB3444368A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Original Assignee
Siemens AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE19671537366 external-priority patent/DE1537366A1/en
Application filed by Siemens AG filed Critical Siemens AG
Publication of GB1193796A publication Critical patent/GB1193796A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/14—Two-way operation using the same type of signal, i.e. duplex
    • H04L5/16—Half-duplex systems; Simplex/duplex switching; Transmission of break signals non-automatically inverting the direction of transmission
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/38—Synchronous or start-stop systems, e.g. for Baudot code
    • H04L25/40—Transmitting circuits; Receiving circuits
    • H04L25/49—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems
    • H04L25/4917—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems using multilevel codes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/02—Channels characterised by the type of signal
    • H04L5/04—Channels characterised by the type of signal the signals being represented by different amplitudes or polarities, e.g. quadriplex
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/14—Two-way operation using the same type of signal, i.e. duplex
    • H04L5/1423—Two-way operation using the same type of signal, i.e. duplex for simultaneous baseband signals

Abstract

1,193,796. Digital transmission systems. SIEMENS A.G. 19 July, 1968 [20 July, 1967], No. 34443/68. Heading H4P. In a D.C. digital transmission system control signals, e.g. switching and dialling signals, are transmitted as voltages of higher amplitude than that used for the data, the control signals being evaluated in terms only of their amplitude. The embodiment described discloses a duplex system in which both stations receive data on input DE or control signals on SE. Units SG generate D.C. voltages of a level characteristic of the control signals, the voltages having shallow leading and trailing edges. The data signals and control voltages are passed to line Ltg via switches u. The data signals are separated at the receivers by units LV and appear on outputs DA. The control voltages are separated by threshold units, e.g. Zener diodes, and are converted to control signals by units SB.
GB3444368A 1967-07-20 1968-07-19 Improvements in or relating to Data Transmission Systems Expired GB1193796A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19671537366 DE1537366A1 (en) 1967-09-07 1967-07-20 Bistable flip-flop for positive or negative transfer clock

Publications (1)

Publication Number Publication Date
GB1193796A true GB1193796A (en) 1970-06-03

Family

ID=5675896

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3444368A Expired GB1193796A (en) 1967-07-20 1968-07-19 Improvements in or relating to Data Transmission Systems

Country Status (1)

Country Link
GB (1) GB1193796A (en)

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees