FR1135280A - Improvements to telephone systems - Google Patents

Improvements to telephone systems

Info

Publication number
FR1135280A
FR1135280A FR1135280DA FR1135280A FR 1135280 A FR1135280 A FR 1135280A FR 1135280D A FR1135280D A FR 1135280DA FR 1135280 A FR1135280 A FR 1135280A
Authority
FR
France
Prior art keywords
telephone systems
telephone
systems
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
Other languages
French (fr)
Inventor
Edward Joseph Leonard
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.)
International Standard Electric Corp
Original Assignee
International Standard Electric Corp
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 International Standard Electric Corp filed Critical International Standard Electric Corp
Application granted granted Critical
Publication of FR1135280A publication Critical patent/FR1135280A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M15/00—Arrangements for metering, time-control or time indication ; Metering, charging or billing arrangements for voice wireline or wireless communications, e.g. VoIP
    • H04M15/08—Metering calls to called party, i.e. B-party charged for the communication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/08—Indicating faults in circuits or apparatus
    • H04M3/12—Marking faulty circuits "busy"; Enabling equipment to disengage itself from faulty circuits ; Using redundant circuits; Response of a circuit, apparatus or system to an error

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
FR1135280D 1954-05-14 1955-05-13 Improvements to telephone systems Expired FR1135280A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US1135280XA 1954-05-14 1954-05-14

Publications (1)

Publication Number Publication Date
FR1135280A true FR1135280A (en) 1957-04-26

Family

ID=22349947

Family Applications (1)

Application Number Title Priority Date Filing Date
FR1135280D Expired FR1135280A (en) 1954-05-14 1955-05-13 Improvements to telephone systems

Country Status (1)

Country Link
FR (1) FR1135280A (en)

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