AU545372B2 - Intrinsically safe coupling unit for telecommunication systems - Google Patents

Intrinsically safe coupling unit for telecommunication systems

Info

Publication number
AU545372B2
AU545372B2 AU83192/82A AU8319282A AU545372B2 AU 545372 B2 AU545372 B2 AU 545372B2 AU 83192/82 A AU83192/82 A AU 83192/82A AU 8319282 A AU8319282 A AU 8319282A AU 545372 B2 AU545372 B2 AU 545372B2
Authority
AU
Australia
Prior art keywords
coupling unit
telecommunication systems
intrinsically safe
safe coupling
intrinsically
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
AU83192/82A
Other versions
AU8319282A (en
Inventor
Gilbert Highet Bertram
Neale David Bertram
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.)
CUSTOM SCIENTIFIC ELECTRONICS PTY Ltd
Original Assignee
CUSTOM SCIENT ELECTRONICS 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 CUSTOM SCIENT ELECTRONICS Pty filed Critical CUSTOM SCIENT ELECTRONICS Pty
Priority to AU83192/82A priority Critical patent/AU545372B2/en
Publication of AU8319282A publication Critical patent/AU8319282A/en
Application granted granted Critical
Publication of AU545372B2 publication Critical patent/AU545372B2/en
Anticipated expiration legal-status Critical
Ceased 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets
    • H04M1/18—Telephone sets specially adapted for use in ships, mines, or other places exposed to adverse environment
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M19/00—Current supply arrangements for telephone systems
    • H04M19/001—Current supply source at the exchanger providing current to substations
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/005—Interface circuits for subscriber lines

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
AU83192/82A 1981-05-01 1981-05-01 Intrinsically safe coupling unit for telecommunication systems Ceased AU545372B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU83192/82A AU545372B2 (en) 1981-05-01 1981-05-01 Intrinsically safe coupling unit for telecommunication systems

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AUPE8676 1981-05-01
AU83192/82A AU545372B2 (en) 1981-05-01 1981-05-01 Intrinsically safe coupling unit for telecommunication systems

Publications (2)

Publication Number Publication Date
AU8319282A AU8319282A (en) 1982-11-04
AU545372B2 true AU545372B2 (en) 1985-07-11

Family

ID=3761340

Family Applications (1)

Application Number Title Priority Date Filing Date
AU83192/82A Ceased AU545372B2 (en) 1981-05-01 1981-05-01 Intrinsically safe coupling unit for telecommunication systems

Country Status (1)

Country Link
AU (1) AU545372B2 (en)

Also Published As

Publication number Publication date
AU8319282A (en) 1982-11-04

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