GB713703A - Identification of line circuits of an automatic switching system by line identification potential marking - Google Patents

Identification of line circuits of an automatic switching system by line identification potential marking

Info

Publication number
GB713703A
GB713703A GB11703/52A GB1170352A GB713703A GB 713703 A GB713703 A GB 713703A GB 11703/52 A GB11703/52 A GB 11703/52A GB 1170352 A GB1170352 A GB 1170352A GB 713703 A GB713703 A GB 713703A
Authority
GB
United Kingdom
Prior art keywords
identification
potential
outlets
outlet
volts
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
GB11703/52A
Inventor
Roelof Maarten Marie Oberman
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 GB713703A publication Critical patent/GB713703A/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
    • H04Q—SELECTING
    • H04Q1/00—Details of selecting apparatus or arrangements
    • H04Q1/18—Electrical details
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Monitoring And Testing Of Exchanges (AREA)
  • Interface Circuits In Exchanges (AREA)

Abstract

713,703. Automatic exchange systems. STAATSBEDRIJF DER POSTERIJEN TELEGRAFIE EN TELEFONIE. May 8, 1952 [May 19, 1951], No. 11703/52. Class 40 (4) Corresponding test outlets of line finders OZ and final selectors EK are interconnected by a star or equivalent delta network of resistors R1 R2, R3, which are connected to a common potential VI of -60 volts and are so chosen that individual line finder and final selector outlets exhibit characteristic identification potentials in the ranges -32 to -60 volts and -28 to 0 volts respectively when the outlets are tested. The identity of line finder outlets is determined by a register (not shown) which tests the potential over a resistor R5 and busies the calling outlet by closing contact b. The corresponding final selector outlet then exhibits the correct identification potential between -28 to 0 volts instead of V1, and indicate a busy condition as well as permitting identification of the outlet by a register. Free final selectors initially have a potential V1, and the correct identification potential does not appear until a resistor R4 is connected in series by the register. A resistor of the same value. as R4 is connected to the outlet for the duration of the call to maintain a busy condition. Specification 647,073 is referred to.
GB11703/52A 1951-05-19 1952-05-08 Identification of line circuits of an automatic switching system by line identification potential marking Expired GB713703A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL309356X 1951-05-19

Publications (1)

Publication Number Publication Date
GB713703A true GB713703A (en) 1954-08-18

Family

ID=19783578

Family Applications (2)

Application Number Title Priority Date Filing Date
GB11703/52A Expired GB713703A (en) 1951-05-19 1952-05-08 Identification of line circuits of an automatic switching system by line identification potential marking
GB11852/52A Expired GB750130A (en) 1951-05-19 1952-05-09 Trunking diagram for an automatic signalling system

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB11852/52A Expired GB750130A (en) 1951-05-19 1952-05-09 Trunking diagram for an automatic signalling system

Country Status (6)

Country Link
BE (2) BE510822A (en)
CH (2) CH309356A (en)
DE (2) DE919480C (en)
FR (2) FR1059993A (en)
GB (2) GB713703A (en)
NL (3) NL81336C (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE969954C (en) * 1954-10-28 1958-08-07 Allg Telefon Fabrik G M B H Circuit arrangement for telecommunications systems with call seekers
DE1029044B (en) * 1955-09-14 1958-04-30 Siemens Ag Relayless subscriber circuit for telephone systems
CN110716467B (en) * 2019-10-16 2021-03-30 南京南瑞继保电气有限公司 Communication method and control system

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE322105C (en) * 1912-09-27 1920-06-22 Western Electric Co Ltd Circuit arrangement for telephone systems, in which calling lines are connected to connecting circuits by means of automatic switching mechanisms
DE696328C (en) * 1937-03-10 1940-09-19 Normalzeit G M B H Circuit arrangement for telecommunication systems with dialer operation for the automatic notification of a subscriber who is prevented from establishing a connection when the connection path becomes free

Also Published As

Publication number Publication date
DE919480C (en) 1954-10-25
NL161343B (en)
BE511424A (en)
CH309356A (en) 1955-08-31
FR1065475A (en) 1954-05-26
DE940359C (en) 1956-03-15
NL81336C (en)
GB750130A (en) 1956-06-13
FR1059993A (en) 1954-03-30
NL161342B (en)
BE510822A (en)
CH316037A (en) 1956-09-15

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