GB2039447B - Low-frequency supplementary information transmitting arrangement for a digital data transmission system - Google Patents

Low-frequency supplementary information transmitting arrangement for a digital data transmission system

Info

Publication number
GB2039447B
GB2039447B GB7927730A GB7927730A GB2039447B GB 2039447 B GB2039447 B GB 2039447B GB 7927730 A GB7927730 A GB 7927730A GB 7927730 A GB7927730 A GB 7927730A GB 2039447 B GB2039447 B GB 2039447B
Authority
GB
United Kingdom
Prior art keywords
low
data transmission
transmission system
digital data
information transmitting
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
GB7927730A
Other versions
GB2039447A (en
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.)
Societe Anonyme de Telecommunications SAT
Original Assignee
Societe Anonyme de Telecommunications SAT
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
Application filed by Societe Anonyme de Telecommunications SAT filed Critical Societe Anonyme de Telecommunications SAT
Publication of GB2039447A publication Critical patent/GB2039447A/en
Application granted granted Critical
Publication of GB2039447B publication Critical patent/GB2039447B/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H04J3/02—Details
    • H04J3/12—Arrangements providing for calling or supervisory signals
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Dc Digital Transmission (AREA)
  • Detection And Prevention Of Errors In Transmission (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
GB7927730A 1979-01-09 1979-08-09 Low-frequency supplementary information transmitting arrangement for a digital data transmission system Expired GB2039447B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7900383A FR2446570A1 (en) 1979-01-09 1979-01-09 METHOD AND DEVICE ALLOWING THE SIMULTANEOUS TRANSMISSION OF A DIGITAL SIGNAL AND A LOW FREQUENCY WAVE

Publications (2)

Publication Number Publication Date
GB2039447A GB2039447A (en) 1980-08-06
GB2039447B true GB2039447B (en) 1983-07-27

Family

ID=9220547

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7927730A Expired GB2039447B (en) 1979-01-09 1979-08-09 Low-frequency supplementary information transmitting arrangement for a digital data transmission system

Country Status (7)

Country Link
BE (1) BE881066A (en)
CA (1) CA1137581A (en)
CH (1) CH640678A5 (en)
DE (1) DE3000941C2 (en)
FR (1) FR2446570A1 (en)
GB (1) GB2039447B (en)
IT (1) IT1154951B (en)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1128766B (en) * 1980-04-04 1986-06-04 Cselt Centro Studi Lab Telecom PROCEDURE AND DEVICE FOR THE SYNCHRONIZATION OF THE PLOT OF AN ADDITIONAL INFORMATION SIGNAL TRANSMITTED TO THE LEVEL DIVISION
US4393493A (en) * 1980-11-10 1983-07-12 International Telephone And Telegraph Corporation Automatic protection apparatus for span lines employed in high speed digital systems
DE3042612A1 (en) * 1980-11-12 1982-06-16 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt TRANSMISSION PROCEDURE FOR DIGITAL SIGNALS
GB2146875A (en) * 1983-09-09 1985-04-24 Racal Res Ltd Communications systems
DE3401729A1 (en) * 1984-01-19 1985-08-01 ANT Nachrichtentechnik GmbH, 7150 Backnang Digital data transmission system
DE3431423A1 (en) * 1984-08-27 1986-03-06 Telefonbau Und Normalzeit Gmbh, 6000 Frankfurt METHOD FOR TRANSMITTING DIGITAL INFORMATION TO CONNECTION LINES OF TELECOMMUNICATIONS, IN PARTICULAR TELECOMMUNICATION SYSTEMS
GB8511804D0 (en) * 1985-05-09 1985-06-19 British Broadcasting Corp Digital data transmission
DE3530546A1 (en) * 1985-08-27 1987-03-19 Ant Nachrichtentech Transmission method for a fast and a slow data stream
DE3806411C2 (en) * 1988-02-29 1996-05-30 Thomson Brandt Gmbh Method of transmitting a sound signal and an additional signal
DE3808829A1 (en) * 1988-03-14 1989-09-28 Deutsche Telephonwerk Kabel Method for data transmission on lines of an integrated services digital communications network
GB2243056B (en) * 1990-04-11 1994-03-30 Stc Plc Repeater supervision
JPH0746224A (en) * 1992-10-09 1995-02-14 Philips Electron Nv Transmission system and receiver

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1250908A (en) * 1968-12-13 1971-10-27
US3671959A (en) * 1969-01-24 1972-06-20 Kokusai Denshin Denwa Co Ltd Binary to ternary converter
DE2512303B1 (en) * 1975-03-20 1976-07-08 Siemens Ag CIRCUIT ARRANGEMENT FOR THE RECEIVING SIDE STEP LENGTH DURING THE CHARACTER-FRAME-BONDED TIME-MULTIPLEX TRANSFER OF DATA
GB1512700A (en) * 1975-10-23 1978-06-01 Standard Telephones Cables Ltd Data transmission
GB1539389A (en) * 1975-12-30 1979-01-31 Standard Telephones Cables Ltd Data transmission
GB1536337A (en) * 1976-06-02 1978-12-20 Standard Telephones Cables Ltd Error detection in digital systems
CH621445A5 (en) * 1976-09-09 1981-01-30 Gretag Ag
FR2367383A1 (en) * 1976-10-08 1978-05-05 Int Standard Electric Corp Error detection circuit for numeric transmission systems - operates using polarity control and is applicable to PCM systems using shift registers

Also Published As

Publication number Publication date
DE3000941A1 (en) 1980-07-17
BE881066A (en) 1980-05-02
CH640678A5 (en) 1984-01-13
DE3000941C2 (en) 1985-09-26
FR2446570B1 (en) 1981-09-18
FR2446570A1 (en) 1980-08-08
IT1154951B (en) 1987-01-21
GB2039447A (en) 1980-08-06
IT8084103A0 (en) 1980-01-09
CA1137581A (en) 1982-12-14

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19960809