GB801576A - Improvements in or relating to electrical signalling systems - Google Patents

Improvements in or relating to electrical signalling systems

Info

Publication number
GB801576A
GB801576A GB2622956A GB2622956A GB801576A GB 801576 A GB801576 A GB 801576A GB 2622956 A GB2622956 A GB 2622956A GB 2622956 A GB2622956 A GB 2622956A GB 801576 A GB801576 A GB 801576A
Authority
GB
United Kingdom
Prior art keywords
circuits
signals
receiver
frequency
group
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
GB2622956A
Other languages
English (en)
Inventor
Frederick Harry Bray
Ronald George Knight
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
Priority to BE562566D priority Critical patent/BE562566A/xx
Application filed by Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Priority to GB2622956A priority patent/GB801576A/en
Priority to FR1180780D priority patent/FR1180780A/fr
Priority to DEI13636A priority patent/DE1076749B/de
Priority to FR751658A priority patent/FR73365E/fr
Publication of GB801576A publication Critical patent/GB801576A/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
    • H04Q3/52—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker using static devices in switching stages, e.g. electronic switching arrangements
    • H04Q3/525—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker using static devices in switching stages, e.g. electronic switching arrangements using tubes in the switching stages
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M19/00—Current supply arrangements for telephone systems
    • H04M19/02—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Monitoring And Testing Of Exchanges (AREA)
GB2622956A 1956-08-28 1956-08-28 Improvements in or relating to electrical signalling systems Expired GB801576A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
BE562566D BE562566A (cg-RX-API-DMAC7.html) 1956-08-28
GB2622956A GB801576A (en) 1956-08-28 1956-08-28 Improvements in or relating to electrical signalling systems
FR1180780D FR1180780A (fr) 1956-08-28 1957-07-31 Perfectionnements aux systèmes téléphoniques automatiques
DEI13636A DE1076749B (de) 1956-08-28 1957-08-27 Halbelektronische Schaltungsanordnung fuer Fernmeldeanlagen, insbesondere automatische Fernsprechanlagen
FR751658A FR73365E (fr) 1956-08-28 1957-11-15 Perfectionnements aux systèmes téléphoniques automatiques

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2622956A GB801576A (en) 1956-08-28 1956-08-28 Improvements in or relating to electrical signalling systems

Publications (1)

Publication Number Publication Date
GB801576A true GB801576A (en) 1958-09-17

Family

ID=10240356

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2622956A Expired GB801576A (en) 1956-08-28 1956-08-28 Improvements in or relating to electrical signalling systems

Country Status (4)

Country Link
BE (1) BE562566A (cg-RX-API-DMAC7.html)
DE (1) DE1076749B (cg-RX-API-DMAC7.html)
FR (1) FR1180780A (cg-RX-API-DMAC7.html)
GB (1) GB801576A (cg-RX-API-DMAC7.html)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE660675C (de) * 1932-02-03 1938-06-01 Gerhard Seelmann Eggebert Dipl Schaltungsanordnung fuer Fernsprechanlagen mit Waehlerbetrieb
DE826167C (de) * 1950-01-10 1951-12-27 Siemens & Halske A G Schaltungsanordnung fuer Fernsprechgebuehrenanzeiger und Muenzfernsprecher

Also Published As

Publication number Publication date
BE562566A (cg-RX-API-DMAC7.html)
FR1180780A (fr) 1959-06-09
DE1076749B (de) 1960-03-03

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