ZA914518B - Communications transmission system - Google Patents

Communications transmission system

Info

Publication number
ZA914518B
ZA914518B ZA914518A ZA914518A ZA914518B ZA 914518 B ZA914518 B ZA 914518B ZA 914518 A ZA914518 A ZA 914518A ZA 914518 A ZA914518 A ZA 914518A ZA 914518 B ZA914518 B ZA 914518B
Authority
ZA
South Africa
Prior art keywords
bidirectional
modem
exchange
subscribers
demultiplexer
Prior art date
Application number
ZA914518A
Inventor
Wilfried Kausel
Kausel Wilfried
Hannes Kremser
Kremser Hannes
Hermann Stallbaumer
Stallbaumer Hermann
Original Assignee
Semoctec Handelsgesellschaft M
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 Semoctec Handelsgesellschaft M filed Critical Semoctec Handelsgesellschaft M
Publication of ZA914518B publication Critical patent/ZA914518B/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H04J3/18—Time-division multiplex systems using frequency compression and subsequent expansion of the individual signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M11/00—Telephonic communication systems specially adapted for combination with other electrical systems
    • H04M11/06—Simultaneous speech and data transmission, e.g. telegraphic transmission over the same conductors
    • H04M11/068—Simultaneous speech and data transmission, e.g. telegraphic transmission over the same conductors using time division multiplex techniques
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M19/00—Current supply arrangements for telephone systems
    • H04M19/08—Current supply arrangements for telephone systems with current supply sources at the substations

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Telephonic Communication Services (AREA)
  • Communication Control (AREA)
  • Transmitters (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
  • Radio Relay Systems (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)
  • Eye Examination Apparatus (AREA)
  • Telephone Set Structure (AREA)
  • Radio Transmission System (AREA)

Abstract

Described is a communications-transmission system, in particular a telephone system, in which subscribers are connected by a line with an exchange, a bidirectional multiplexer or demultiplexer (4, 4') being connected via a bidirectional modem (5, 5') at the exchange end and at the subscriber end, respectively, of the line (6), the modem modulating and demodulating the data, depending on the transmission. Connected to the multiplexers and demultiplexers (4, 4') are, respectively, bidirectional compressor and decompressor circuits (3, 3') to which the subscribers are connected via bidirectional analog/digital converters (2) or a switching device (11; 11') at the exchange via control circuits (2', 12, 13). Alternatively, the invention can call for a bidirectional modem (5, 5') to be connected at the exchange end and the subscriber end of the line (6), the modem modulating and demodulating the data depending on the transmission, a bidirectional compressor or decompressor circuit (17, 17') being connected to the modem and a bidirectional multiplexer or demultiplexer (18, 18') being connected to the compressor circuit or decompressor circuit, the subscribers being connected to the multiplexer or demultiplexer via bidirectional analog/digital converters (2) or a switching device (11; 11') at the exchange via control circuits (2'; 12; 13).
ZA914518A 1990-06-13 1991-06-13 Communications transmission system ZA914518B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT0128690A AT396535B (en) 1990-06-13 1990-06-13 MESSAGE TRANSMISSION SYSTEM, IN PARTICULAR TELEPHONE SYSTEM

Publications (1)

Publication Number Publication Date
ZA914518B true ZA914518B (en) 1992-04-29

Family

ID=3510603

Family Applications (1)

Application Number Title Priority Date Filing Date
ZA914518A ZA914518B (en) 1990-06-13 1991-06-13 Communications transmission system

Country Status (12)

Country Link
EP (1) EP0533755B2 (en)
AT (2) AT396535B (en)
BG (1) BG43Y1 (en)
CZ (1) CZ281443B6 (en)
DE (1) DE59108545D1 (en)
GR (2) GR3023369T3 (en)
HU (1) HU213436B (en)
PL (1) PL168636B1 (en)
RU (1) RU2108683C1 (en)
SK (1) SK279649B6 (en)
WO (1) WO1991020141A1 (en)
ZA (1) ZA914518B (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT399071B (en) * 1992-10-27 1995-03-27 Semcotec Handel MESSAGE TRANSMISSION SYSTEM, IN PARTICULAR TELEPHONE SYSTEM
DE4334004A1 (en) * 1993-10-06 1995-04-13 Hoechst Ag Aramid fibers of high strength and high titer, process for their production and their use
DE29605533U1 (en) * 1996-03-14 1997-07-17 Elmeg Gmbh Kommunikationstechnik, 31228 Peine Interface converter
AT408297B (en) * 1997-08-19 2001-10-25 Ericsson Austria Ag MESSAGE TRANSMISSION SYSTEM, IN PARTICULAR TELEPHONE SYSTEM
BG1170U1 (en) * 2008-07-22 2009-03-31 Сд "Елта - Р - Ченкин И С-Ие" Communication system

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4021619A (en) * 1974-06-10 1977-05-03 The Post Office Improved digital telephone and switching system employing time division multiplex pulse code modulation
CA1211241A (en) * 1984-04-30 1986-09-09 Joseph W. Hingston Line feed circuit for a digital signal loop
US4750169A (en) * 1985-03-12 1988-06-07 Pacific Bell Telephone system and method for transmitting digital information
JP2713883B2 (en) * 1986-02-07 1998-02-16 株式会社日立製作所 Time division switch
DE3609889A1 (en) * 1986-03-24 1987-10-08 Siemens Ag Circuit arrangement for telecommunications switching systems, in particular PCM telephone switching systems, with concentrators
US4769833A (en) * 1986-03-31 1988-09-06 American Telephone And Telegraph Company Wideband switching system
DE3708975A1 (en) * 1987-03-19 1988-10-06 Kabelmetal Electro Gmbh Circuit arrangement for transmitting communications signals

Also Published As

Publication number Publication date
PL168636B1 (en) 1996-03-29
GR3034692T3 (en) 2001-01-31
DE59108545D1 (en) 1997-03-27
CS178191A3 (en) 1992-04-15
CZ281443B6 (en) 1996-10-16
HU213436B (en) 1997-06-30
EP0533755B1 (en) 1997-02-12
ATE148968T1 (en) 1997-02-15
WO1991020141A1 (en) 1991-12-26
RU2108683C1 (en) 1998-04-10
HUT62426A (en) 1993-04-28
BG43Y1 (en) 1996-07-31
GR3023369T3 (en) 1997-08-29
ATA128690A (en) 1993-01-15
SK279649B6 (en) 1999-01-11
AT396535B (en) 1993-10-25
EP0533755B2 (en) 2000-08-02
HU9203723D0 (en) 1993-04-28
EP0533755A1 (en) 1993-03-31

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