IT1154951B - Dispositivo per trasmettere un'informazione supplementare a bassa frequenza in un sistema digitale di trasmissione dati - Google Patents
Dispositivo per trasmettere un'informazione supplementare a bassa frequenza in un sistema digitale di trasmissione datiInfo
- Publication number
- IT1154951B IT1154951B IT84103/80A IT8410380A IT1154951B IT 1154951 B IT1154951 B IT 1154951B IT 84103/80 A IT84103/80 A IT 84103/80A IT 8410380 A IT8410380 A IT 8410380A IT 1154951 B IT1154951 B IT 1154951B
- Authority
- IT
- Italy
- Prior art keywords
- data transmission
- low frequency
- transmission system
- additional information
- digital data
- Prior art date
Links
- 230000005540 biological transmission Effects 0.000 title 1
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)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7900383A FR2446570A1 (fr) | 1979-01-09 | 1979-01-09 | Procede et dispositif permettant la transmission simultanee d'un signal numerique et d'une onde basse frequence |
Publications (2)
Publication Number | Publication Date |
---|---|
IT8084103A0 IT8084103A0 (it) | 1980-01-09 |
IT1154951B true IT1154951B (it) | 1987-01-21 |
Family
ID=9220547
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
IT84103/80A IT1154951B (it) | 1979-01-09 | 1980-01-09 | Dispositivo per trasmettere un'informazione supplementare a bassa frequenza in un sistema digitale di trasmissione dati |
Country Status (7)
Country | Link |
---|---|
BE (1) | BE881066A (it) |
CA (1) | CA1137581A (it) |
CH (1) | CH640678A5 (it) |
DE (1) | DE3000941C2 (it) |
FR (1) | FR2446570A1 (it) |
GB (1) | GB2039447B (it) |
IT (1) | IT1154951B (it) |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IT1128766B (it) * | 1980-04-04 | 1986-06-04 | Cselt Centro Studi Lab Telecom | Procedimento e dispositivo per la sincronizzazione di trama di un segnale di informazione supplementare trasmesso a divisione di livello |
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 (de) * | 1980-11-12 | 1982-06-16 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | Uebertragungsverfahren fuer digitale signale |
GB2146875A (en) * | 1983-09-09 | 1985-04-24 | Racal Res Ltd | Communications systems |
DE3401729C2 (de) * | 1984-01-19 | 1987-04-23 | ANT Nachrichtentechnik GmbH, 7150 Backnang | Digitales Datenübertragungsverfahren mit Übertragung zusätzlicher Informationen |
DE3431423A1 (de) * | 1984-08-27 | 1986-03-06 | Telefonbau Und Normalzeit Gmbh, 6000 Frankfurt | Verfahren zur uebertragung von digitalen informationen auf anschlussleitungen von fernmelde-, insbesondere fernsprechvermittlungsanlagen |
GB8511804D0 (en) * | 1985-05-09 | 1985-06-19 | British Broadcasting Corp | Digital data transmission |
DE3530546A1 (de) * | 1985-08-27 | 1987-03-19 | Ant Nachrichtentech | Uebertragungsverfahren fuer schnellen und langsamen datenstrom |
DE3806411C2 (de) * | 1988-02-29 | 1996-05-30 | Thomson Brandt Gmbh | Verfahren zur Übertragung eines Tonsignals und eines Zusatzsignals |
DE3808829A1 (de) * | 1988-03-14 | 1989-09-28 | Deutsche Telephonwerk Kabel | Verfahren zur datenuebertragung auf leitungen eines diensteintegrierenden digitalen nachrichtennetzes |
GB2243056B (en) * | 1990-04-11 | 1994-03-30 | Stc Plc | Repeater supervision |
JPH0746224A (ja) * | 1992-10-09 | 1995-02-14 | Philips Electron Nv | 送信システム及び受信機 |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1250908A (it) * | 1968-12-13 | 1971-10-27 | ||
US3671959A (en) * | 1969-01-24 | 1972-06-20 | Kokusai Denshin Denwa Co Ltd | Binary to ternary converter |
DE2512303B1 (de) * | 1975-03-20 | 1976-07-08 | Siemens Ag | Schaltungsanordnung zur empfangsseitigen stopschrittverlaengerung bei der zeichenrahmen-gebundenen zeitmultiplex-uebertragung von daten |
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 (it) * | 1976-09-09 | 1981-01-30 | Gretag Ag | |
FR2367383A1 (fr) * | 1976-10-08 | 1978-05-05 | Int Standard Electric Corp | Dispositif et methode pour la detection des erreurs dans les systemes de transmission numerique |
-
1979
- 1979-01-09 FR FR7900383A patent/FR2446570A1/fr active Granted
- 1979-08-09 GB GB7927730A patent/GB2039447B/en not_active Expired
-
1980
- 1980-01-04 CH CH3280A patent/CH640678A5/fr not_active IP Right Cessation
- 1980-01-08 CA CA000343230A patent/CA1137581A/en not_active Expired
- 1980-01-09 DE DE3000941A patent/DE3000941C2/de not_active Expired
- 1980-01-09 IT IT84103/80A patent/IT1154951B/it active
- 1980-01-09 BE BE0/198905A patent/BE881066A/fr not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
DE3000941A1 (de) | 1980-07-17 |
FR2446570B1 (it) | 1981-09-18 |
GB2039447B (en) | 1983-07-27 |
DE3000941C2 (de) | 1985-09-26 |
CH640678A5 (fr) | 1984-01-13 |
CA1137581A (en) | 1982-12-14 |
FR2446570A1 (fr) | 1980-08-08 |
BE881066A (fr) | 1980-05-02 |
GB2039447A (en) | 1980-08-06 |
IT8084103A0 (it) | 1980-01-09 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
TA | Fee payment date (situation as of event date), data collected since 19931001 |
Effective date: 19950131 |