AU575272B2 - Circuit arrangement for binary character analysis - Google Patents

Circuit arrangement for binary character analysis

Info

Publication number
AU575272B2
AU575272B2 AU72926/87A AU7292687A AU575272B2 AU 575272 B2 AU575272 B2 AU 575272B2 AU 72926/87 A AU72926/87 A AU 72926/87A AU 7292687 A AU7292687 A AU 7292687A AU 575272 B2 AU575272 B2 AU 575272B2
Authority
AU
Australia
Prior art keywords
current
binary
voltage
value
current value
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.)
Ceased
Application number
AU72926/87A
Other versions
AU7292687A (en
Inventor
Helmut Sundermann
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
Application filed by Siemens AG filed Critical Siemens AG
Publication of AU7292687A publication Critical patent/AU7292687A/en
Application granted granted Critical
Publication of AU575272B2 publication Critical patent/AU575272B2/en
Anticipated expiration legal-status Critical
Ceased 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
    • H04L5/1469—Two-way operation using the same type of signal, i.e. duplex using time-sharing
    • H04L5/1484—Two-way operation using the same type of signal, i.e. duplex using time-sharing operating bytewise
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q1/00—Details of selecting apparatus or arrangements
    • H04Q1/18—Electrical details
    • H04Q1/30—Signalling arrangements; Manipulation of signalling currents
    • H04Q1/38—Signalling arrangements; Manipulation of signalling currents using combinations of direct currents of different amplitudes or polarities over line conductors or combination of line conductors

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)
  • Image Processing (AREA)
  • Image Generation (AREA)
  • Monitoring And Testing Of Exchanges (AREA)
  • Dc Digital Transmission (AREA)

Abstract

Between the central equipment (ZE) and a terminal equipment (E1) connected to it, information items are alternately transmitted. The binary values can be formed by a lowering of the current or by the closed-circuit current value of the signal line. For the information items to be transmitted in the opposite direction, a voltage modulation can be provided. In the modem existing in the central equipment (ZSt), a weighting of the binary characters independent of the choice of current values is carried out for the evaluation of the binary characters formed via the current modulation. Thus, binary characters can be reliably decoded in any case, even if terminal equipments having a different mean current consumption are connected. To make this possible, a voltage comparator (K) is used, one input (x) of which is supplied with the voltage derived from the upper current value and at least approximately corresponding to this value and the other input (y) of which is supplied with the voltage corresponding to the instantaneous current value. Independently of the type of the respective terminal equipment, any change in the binary value then results in a corresponding change in the output signal of the voltage comparator. <IMAGE>
AU72926/87A 1986-05-15 1987-05-14 Circuit arrangement for binary character analysis Ceased AU575272B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3616345 1986-05-15
DE3616345 1986-05-15

Publications (2)

Publication Number Publication Date
AU7292687A AU7292687A (en) 1987-11-19
AU575272B2 true AU575272B2 (en) 1988-07-21

Family

ID=6300876

Family Applications (1)

Application Number Title Priority Date Filing Date
AU72926/87A Ceased AU575272B2 (en) 1986-05-15 1987-05-14 Circuit arrangement for binary character analysis

Country Status (4)

Country Link
EP (1) EP0246480B1 (en)
AT (1) ATE92231T1 (en)
AU (1) AU575272B2 (en)
DE (1) DE3786700D1 (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU543673B2 (en) * 1982-04-22 1985-04-26 Siemens Aktiengesellschaft Telephone system

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3886315A (en) * 1973-10-01 1975-05-27 Gte Automatic Electric Lab Inc Arrangement and method of signalling both ways through a two wire electronic junctor
DE3001548C2 (en) * 1980-01-17 1982-11-18 Telefonbau Und Normalzeit Gmbh, 6000 Frankfurt Circuit arrangement for the transmission of signals to and from a subscriber station of a telephone private branch exchange
SE451930B (en) * 1982-11-16 1987-11-02 Rydborn S A O SET TO CONSULT AND INDEPENDENTLY TRANSMIT TWO UNMODULATED SIGNALS ON A SINGLE LEADER AND DEVICE IMPLEMENTATION DEVICE

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU543673B2 (en) * 1982-04-22 1985-04-26 Siemens Aktiengesellschaft Telephone system

Also Published As

Publication number Publication date
ATE92231T1 (en) 1993-08-15
EP0246480A2 (en) 1987-11-25
EP0246480A3 (en) 1989-11-15
EP0246480B1 (en) 1993-07-28
DE3786700D1 (en) 1993-09-02
AU7292687A (en) 1987-11-19

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Legal Events

Date Code Title Description
MK14 Patent ceased section 143(a) (annual fees not paid) or expired