GB516235A - Improvements in or relating to telephone systems - Google Patents

Improvements in or relating to telephone systems

Info

Publication number
GB516235A
GB516235A GB1843638A GB1843638A GB516235A GB 516235 A GB516235 A GB 516235A GB 1843638 A GB1843638 A GB 1843638A GB 1843638 A GB1843638 A GB 1843638A GB 516235 A GB516235 A GB 516235A
Authority
GB
United Kingdom
Prior art keywords
relay
digit
over
repeater
discriminator
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
GB1843638A
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.)
Associated Telephone and Telegraph Co
Original Assignee
Associated Telephone and Telegraph Co
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 to BE435006D priority Critical patent/BE435006A/xx
Application filed by Associated Telephone and Telegraph Co filed Critical Associated Telephone and Telegraph Co
Priority to GB1843638A priority patent/GB516235A/en
Publication of GB516235A publication Critical patent/GB516235A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/42—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker
    • 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)
GB1843638A 1938-06-21 1938-06-21 Improvements in or relating to telephone systems Expired GB516235A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
BE435006D BE435006A (en:Method) 1938-06-21
GB1843638A GB516235A (en) 1938-06-21 1938-06-21 Improvements in or relating to telephone systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1843638A GB516235A (en) 1938-06-21 1938-06-21 Improvements in or relating to telephone systems

Publications (1)

Publication Number Publication Date
GB516235A true GB516235A (en) 1939-12-28

Family

ID=10112409

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1843638A Expired GB516235A (en) 1938-06-21 1938-06-21 Improvements in or relating to telephone systems

Country Status (2)

Country Link
BE (1) BE435006A (en:Method)
GB (1) GB516235A (en:Method)

Also Published As

Publication number Publication date
BE435006A (en:Method)

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