AU580679B2 - A telephone line switch - Google Patents

A telephone line switch

Info

Publication number
AU580679B2
AU580679B2 AU59803/86A AU5980386A AU580679B2 AU 580679 B2 AU580679 B2 AU 580679B2 AU 59803/86 A AU59803/86 A AU 59803/86A AU 5980386 A AU5980386 A AU 5980386A AU 580679 B2 AU580679 B2 AU 580679B2
Authority
AU
Australia
Prior art keywords
telephone line
line switch
switch
telephone
line
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
AU59803/86A
Other versions
AU5980386A (en
Inventor
Peter Anton Goode
David Russell Stevenson
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.)
Nokia Services Ltd
Original Assignee
Standard Telephone and Cables Pty Ltd
Standard Telephone and Cables PLC
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 Standard Telephone and Cables Pty Ltd, Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables Pty Ltd
Priority to AU59803/86A priority Critical patent/AU580679B2/en
Priority to PCT/AU1986/000182 priority patent/WO1987000717A1/en
Publication of AU5980386A publication Critical patent/AU5980386A/en
Application granted granted Critical
Publication of AU580679B2 publication Critical patent/AU580679B2/en
Assigned to ALCATEL AUSTRALIA LIMITED reassignment ALCATEL AUSTRALIA LIMITED Request to Amend Deed and Register Assignors: STANDARD TELEPHONES AND CABLES PTY. LIMITED
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/26—Devices for calling a subscriber
    • H04M1/30—Devices which can set up and transmit only one digit at a time
    • H04M1/31—Devices which can set up and transmit only one digit at a time by interrupting current to generate trains of pulses; by periodically opening and closing contacts to generate trains of pulses
    • H04M1/312—Devices which can set up and transmit only one digit at a time by interrupting current to generate trains of pulses; by periodically opening and closing contacts to generate trains of pulses pulses produced by electronic circuits
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/08—Modifications for protecting switching circuit against overcurrent or overvoltage
    • H03K17/082—Modifications for protecting switching circuit against overcurrent or overvoltage by feedback from the output to the control circuit
    • H03K17/0826—Modifications for protecting switching circuit against overcurrent or overvoltage by feedback from the output to the control circuit in bipolar transistor switches
    • 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
    • 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)
AU59803/86A 1985-07-18 1986-07-07 A telephone line switch Ceased AU580679B2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU59803/86A AU580679B2 (en) 1985-07-18 1986-07-07 A telephone line switch
PCT/AU1986/000182 WO1987000717A1 (en) 1985-07-18 1986-07-07 A telephone line switch

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AUPH1533 1985-07-18
AU59803/86A AU580679B2 (en) 1985-07-18 1986-07-07 A telephone line switch

Publications (2)

Publication Number Publication Date
AU5980386A AU5980386A (en) 1987-01-22
AU580679B2 true AU580679B2 (en) 1989-01-27

Family

ID=3745033

Family Applications (1)

Application Number Title Priority Date Filing Date
AU59803/86A Ceased AU580679B2 (en) 1985-07-18 1986-07-07 A telephone line switch

Country Status (1)

Country Link
AU (1) AU580679B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU606397B2 (en) * 1987-04-09 1991-02-07 Standard Telephones And Cables Pty. Limited Telephone subset circuit arrangement

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1574078A (en) * 1976-12-01 1980-09-03 Telefonbau & Normalzeit Gmbh Voltage-limiting circuit
US4388499A (en) * 1980-02-26 1983-06-14 U.S. Philips Corporation Line interruption circuit for use in a telephone set
US4390753A (en) * 1980-02-26 1983-06-28 U.S. Philips Corporation Line interruption arrangement

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1574078A (en) * 1976-12-01 1980-09-03 Telefonbau & Normalzeit Gmbh Voltage-limiting circuit
US4388499A (en) * 1980-02-26 1983-06-14 U.S. Philips Corporation Line interruption circuit for use in a telephone set
US4390753A (en) * 1980-02-26 1983-06-28 U.S. Philips Corporation Line interruption arrangement

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU606397B2 (en) * 1987-04-09 1991-02-07 Standard Telephones And Cables Pty. Limited Telephone subset circuit arrangement

Also Published As

Publication number Publication date
AU5980386A (en) 1987-01-22

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