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AU409703B1 - Improvements in or relating to private manual branch telephone exchanges - Google Patents

Improvements in or relating to private manual branch telephone exchanges

Info

Publication number
AU409703B1
AU409703B1 AU7101/66A AU710166A AU409703B1 AU 409703 B1 AU409703 B1 AU 409703B1 AU 7101/66 A AU7101/66 A AU 7101/66A AU 710166 A AU710166 A AU 710166A AU 409703 B1 AU409703 B1 AU 409703B1
Authority
AU
Australia
Prior art keywords
relating
telephone exchanges
branch telephone
manual branch
private
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
AU7101/66A
Inventor
Jack Peady Clifford
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.)
Telephone Manufacturing Co (australasia Ltd Pty
Original Assignee
Telephone Manufacturing Co (australasia Ltd Pty
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 Telephone Manufacturing Co (australasia Ltd Pty filed Critical Telephone Manufacturing Co (australasia Ltd Pty
Priority to AU7101/66A priority Critical patent/AU409703B1/en
Priority to GB25513/67A priority patent/GB1142669A/en
Application granted granted Critical
Publication of AU409703B1 publication Critical patent/AU409703B1/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M19/00—Current supply arrangements for telephone systems
    • H04M19/02—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone
    • H04M19/04—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone the ringing-current being generated at the substations
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/22—Arrangements for supervision, monitoring or testing
    • H04M3/2272—Subscriber line supervision circuits, e.g. call detection circuits
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M9/00—Arrangements for interconnection not involving centralised switching

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)
AU7101/66A 1966-06-17 1966-06-17 Improvements in or relating to private manual branch telephone exchanges Expired AU409703B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU7101/66A AU409703B1 (en) 1966-06-17 1966-06-17 Improvements in or relating to private manual branch telephone exchanges
GB25513/67A GB1142669A (en) 1966-06-17 1967-06-02 Improvements in or relating to private manual branch telephone exchanges

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AU7101/66A AU409703B1 (en) 1966-06-17 1966-06-17 Improvements in or relating to private manual branch telephone exchanges

Publications (1)

Publication Number Publication Date
AU409703B1 true AU409703B1 (en) 1971-01-11

Family

ID=3697705

Family Applications (1)

Application Number Title Priority Date Filing Date
AU7101/66A Expired AU409703B1 (en) 1966-06-17 1966-06-17 Improvements in or relating to private manual branch telephone exchanges

Country Status (2)

Country Link
AU (1) AU409703B1 (en)
GB (1) GB1142669A (en)

Also Published As

Publication number Publication date
GB1142669A (en) 1969-02-12

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