GB831499A - Signalling system for carrier frequency telephone systems - Google Patents

Signalling system for carrier frequency telephone systems

Info

Publication number
GB831499A
GB831499A GB30874/56A GB3087456A GB831499A GB 831499 A GB831499 A GB 831499A GB 30874/56 A GB30874/56 A GB 30874/56A GB 3087456 A GB3087456 A GB 3087456A GB 831499 A GB831499 A GB 831499A
Authority
GB
United Kingdom
Prior art keywords
carrier frequency
signalling
oct
telephone systems
frequencies
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
GB30874/56A
Inventor
Gerrit Jan Kamerbeck
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.)
Nederlanden Staat
Original Assignee
Nederlanden Staat
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 Nederlanden Staat filed Critical Nederlanden Staat
Publication of GB831499A publication Critical patent/GB831499A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J1/00—Frequency-division multiplex systems
    • H04J1/02—Details
    • H04J1/14—Arrangements providing for calling or supervisory signals

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Monitoring And Testing Of Exchanges (AREA)
  • Optical Communication System (AREA)

Abstract

831,499. Automatic exchange systems. STAAT DER NEDERLANDEN TEN DEZE VERTEGENWOORDIGD DOOR DE DIRECTEUR - GENERAAL DER POSTERIJEN, TELEGRAFIE EN TELEFONIE, DE. Oct. 10, 1956 [Oct. 10, 1955], No. 30874/56. Drawings to Specification. Class 40 (4). In a system employing carrier working, one or more frequencies within the speech band are employed for signalling until selection is complete, after which the signalling frequencies to be effective must be preceded or accompanied by a control frequency outside the speech band, for example the carrier frequency. The circuit changes in the signal receiver are brought about in response to a backward end-of-selection signal.
GB30874/56A 1955-10-10 1956-10-10 Signalling system for carrier frequency telephone systems Expired GB831499A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL348427X 1955-10-10

Publications (1)

Publication Number Publication Date
GB831499A true GB831499A (en) 1960-03-30

Family

ID=19784970

Family Applications (1)

Application Number Title Priority Date Filing Date
GB30874/56A Expired GB831499A (en) 1955-10-10 1956-10-10 Signalling system for carrier frequency telephone systems

Country Status (6)

Country Link
BE (1) BE551638A (en)
CH (1) CH348427A (en)
DE (1) DE1062747B (en)
FR (1) FR1192150A (en)
GB (1) GB831499A (en)
NL (2) NL104622C (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL267512A (en) * 1960-07-25
DE1258914B (en) * 1966-02-04 1968-01-18 Telefunken Patent Method for connecting subscriber stations to a telephone exchange with dialer operation via a carrier frequency path

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE454346A (en) * 1943-03-08
DE863673C (en) * 1951-06-29 1953-01-19 Siemens Ag Electrical signal receiver

Also Published As

Publication number Publication date
CH348427A (en) 1960-08-31
FR1192150A (en) 1959-10-23
NL201114A (en)
BE551638A (en)
NL104622C (en)
DE1062747B (en) 1959-08-06

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