GB498374A - Improvements in or relating to call-recording arrangements in telephone or like systems - Google Patents

Improvements in or relating to call-recording arrangements in telephone or like systems

Info

Publication number
GB498374A
GB498374A GB3579/38A GB357938A GB498374A GB 498374 A GB498374 A GB 498374A GB 3579/38 A GB3579/38 A GB 3579/38A GB 357938 A GB357938 A GB 357938A GB 498374 A GB498374 A GB 498374A
Authority
GB
United Kingdom
Prior art keywords
relays
digit
switch
tariff
magnet
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
GB3579/38A
Other languages
English (en)
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.)
STC PLC
Original Assignee
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 PLC filed Critical Standard Telephone and Cables PLC
Publication of GB498374A publication Critical patent/GB498374A/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
    • H04M15/38—Charging, billing or metering by apparatus other than mechanical step-by-step counter type
    • 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
    • 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
    • H04M15/04—Recording calls, or communications in printed, perforated or other permanent form

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Meter Arrangements (AREA)
GB3579/38A 1937-03-10 1938-02-04 Improvements in or relating to call-recording arrangements in telephone or like systems Expired GB498374A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
BE211385X 1937-03-10

Publications (1)

Publication Number Publication Date
GB498374A true GB498374A (en) 1939-01-06

Family

ID=3865936

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3579/38A Expired GB498374A (en) 1937-03-10 1938-02-04 Improvements in or relating to call-recording arrangements in telephone or like systems

Country Status (4)

Country Link
BE (1) BE420466A (enrdf_load_stackoverflow)
CH (1) CH211385A (enrdf_load_stackoverflow)
FR (1) FR835041A (enrdf_load_stackoverflow)
GB (1) GB498374A (enrdf_load_stackoverflow)

Also Published As

Publication number Publication date
CH211385A (de) 1940-09-15
FR835041A (fr) 1938-12-09
BE420466A (enrdf_load_stackoverflow)

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