GB528193A - Improvements in or relating to telecommunication exchange systems - Google Patents

Improvements in or relating to telecommunication exchange systems

Info

Publication number
GB528193A
GB528193A GB12131/39A GB1213139A GB528193A GB 528193 A GB528193 A GB 528193A GB 12131/39 A GB12131/39 A GB 12131/39A GB 1213139 A GB1213139 A GB 1213139A GB 528193 A GB528193 A GB 528193A
Authority
GB
United Kingdom
Prior art keywords
area
exchange systems
relating
areas
long distance
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
GB12131/39A
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 GB528193A publication Critical patent/GB528193A/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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)
  • Exchange Systems With Centralized Control (AREA)
GB12131/39A 1939-04-22 1939-04-22 Improvements in or relating to telecommunication exchange systems Expired GB528193A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB219019X 1939-04-22

Publications (1)

Publication Number Publication Date
GB528193A true GB528193A (en) 1940-10-24

Family

ID=10170718

Family Applications (1)

Application Number Title Priority Date Filing Date
GB12131/39A Expired GB528193A (en) 1939-04-22 1939-04-22 Improvements in or relating to telecommunication exchange systems

Country Status (4)

Country Link
BE (1) BE438722A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
CH (1) CH219019A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
FR (1) FR864742A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
GB (1) GB528193A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Also Published As

Publication number Publication date
FR864742A (fr) 1941-05-03
CH219019A (fr) 1942-01-15
BE438722A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Similar Documents

Publication Publication Date Title
GB516408A (en) Improvements in or relating to automatic or semi-automatic telephone systems
GB489609A (en) Improvements in or relating to electrical communication exchange systems
GB565665A (en) Improvements in telephone systems
GB554091A (en) Telephone systems
GB550244A (en) Improvements in telephone systems
GB560807A (en) Improvements in telephone or like systems
GB528193A (en) Improvements in or relating to telecommunication exchange systems
GB484649A (en) Improvements in or relating to telephone or like systems
FR862931A (fr) Envoyeur d'impulsions notamment pour abonné de réseau téléphonique automatique
FR885486A (fr) Systèmes téléphoniques ou similaires pour l'établissement de connexions
GB788595A (en) Improvements in or relating to automatic telecommunication exchange systems
CH214512A (de) Fernsprechanlage mit Münzfernsprecher.
GB555523A (en) Bridge-stabilised oscillators for voice frequency circuits
GB1032966A (en) Private automatic branch exchanges
GB549510A (en) Improvements in or relating to telephone systems
GB556929A (en) Improvements in or relating to automatic or semi-automatic telephone systems
GB326571A (en) Improvements in or relating to telephone systems
SE331703B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
AU100360B2 (en) An improved call meter for telephone systems
GB1234857A (en) Improvements to linking equipment between telephone exchanges
AU115006B2 (en) Telephone ringing systems
GB1028177A (en) Improvements in or relating to automatic switching systems
GB1024148A (en) Circuit arrangement for controlling the subscriber's meter and charge indicator in telecommunication systems, particularly telephone systems
GB598224A (en) Improvements in or relating to telecommunication systems
IE16461L (en) Call discrimination in telephone exchanges.