FR831620A - Improvements to telephone systems - Google Patents

Improvements to telephone systems

Info

Publication number
FR831620A
FR831620A FR831620DA FR831620A FR 831620 A FR831620 A FR 831620A FR 831620D A FR831620D A FR 831620DA FR 831620 A FR831620 A FR 831620A
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)
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.)
Associated Electric Laboratories Inc
Original Assignee
Associated Electric Laboratories Inc
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
Priority claimed from GB435/37A external-priority patent/GB488430A/en
Application filed by Associated Electric Laboratories Inc filed Critical Associated Electric Laboratories Inc
Application granted granted Critical
Publication of FR831620A publication Critical patent/FR831620A/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
    • H04M15/10—Metering calls from calling party, i.e. A-party charged for the communication
    • 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
    • H04Q1/32—Signalling arrangements; Manipulation of signalling currents using trains of dc pulses
    • H04Q1/36—Pulse-correcting arrangements, e.g. for reducing effects due to interference

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Interface Circuits In Exchanges (AREA)
FR831620D 1937-01-06 1938-01-04 Improvements to telephone systems Expired FR831620A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB435/37A GB488430A (en) 1937-01-06 1937-01-06 Improvements in or relating to telephone systems
GB2232181X 1937-01-06
GB831620X 1937-01-06

Publications (1)

Publication Number Publication Date
FR831620A true FR831620A (en) 1938-09-09

Family

ID=27253720

Family Applications (1)

Application Number Title Priority Date Filing Date
FR831620D Expired FR831620A (en) 1937-01-06 1938-01-04 Improvements to telephone systems

Country Status (2)

Country Link
US (1) US2232181A (en)
FR (1) FR831620A (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL69604C (en) * 1945-06-13
US2543022A (en) * 1945-08-03 1951-02-27 Standard Telephones Cables Ltd Metering circuit control for automatic telephone systems
US2546605A (en) * 1947-02-12 1951-03-27 Automatic Elect Lab Measured service telephone system
US2602119A (en) * 1947-10-15 1952-07-01 Automatic Elect Lab Pay station time signal
US2570239A (en) * 1948-12-15 1951-10-09 Standard Telephones Cables Ltd Time zone telephone metering system
US2595062A (en) * 1949-12-12 1952-04-29 Stromberg Carlson Co Telephone conversation timing means
BE503542A (en) * 1950-06-21
US2747016A (en) * 1952-11-14 1956-05-22 Gen Dynamics Corp Conversation timing circuit
US3723663A (en) * 1971-09-24 1973-03-27 J Ewen Battery feed and ring trip relay circuit

Also Published As

Publication number Publication date
US2232181A (en) 1941-02-18

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