GB559403A - Improvements in telephone systems - Google Patents

Improvements in telephone systems

Info

Publication number
GB559403A
GB559403A GB15775/42A GB1577542A GB559403A GB 559403 A GB559403 A GB 559403A GB 15775/42 A GB15775/42 A GB 15775/42A GB 1577542 A GB1577542 A GB 1577542A GB 559403 A GB559403 A GB 559403A
Authority
GB
United Kingdom
Prior art keywords
relay
extended service
subscriber
charge
subscribers
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
GB15775/42A
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.)
Automatic Telephone and Electric Co Ltd
Original Assignee
Automatic Telephone and Electric Co Ltd
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 Automatic Telephone and Electric Co Ltd filed Critical Automatic Telephone and Electric Co Ltd
Publication of GB559403A publication Critical patent/GB559403A/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
    • H04M15/04—Recording calls, or communications in printed, perforated or other permanent form
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Meter Arrangements (AREA)
GB15775/42A 1941-12-20 1942-11-09 Improvements in telephone systems Expired GB559403A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US559403XA 1941-12-20 1941-12-20

Publications (1)

Publication Number Publication Date
GB559403A true GB559403A (en) 1944-02-17

Family

ID=22001122

Family Applications (1)

Application Number Title Priority Date Filing Date
GB15775/42A Expired GB559403A (en) 1941-12-20 1942-11-09 Improvements in telephone systems

Country Status (2)

Country Link
BE (1) BE470549A (cs)
GB (1) GB559403A (cs)

Also Published As

Publication number Publication date
BE470549A (cs)

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