GB937258A - Improvements in automatic telecommunication systems - Google Patents

Improvements in automatic telecommunication systems

Info

Publication number
GB937258A
GB937258A GB1533161A GB1533161A GB937258A GB 937258 A GB937258 A GB 937258A GB 1533161 A GB1533161 A GB 1533161A GB 1533161 A GB1533161 A GB 1533161A GB 937258 A GB937258 A GB 937258A
Authority
GB
United Kingdom
Prior art keywords
calling
signals
individual
identity
line
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
GB1533161A
Inventor
Ivan Witalis Grundin
Harry Freese
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.)
SVENSKA RELAFABRIKEN A B N AKT
SVENSKA RELAFABRIKEN ABN AB
Original Assignee
SVENSKA RELAFABRIKEN A B N AKT
SVENSKA RELAFABRIKEN ABN AB
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 SVENSKA RELAFABRIKEN A B N AKT, SVENSKA RELAFABRIKEN ABN AB filed Critical SVENSKA RELAFABRIKEN A B N AKT
Publication of GB937258A publication Critical patent/GB937258A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/0004—Selecting arrangements using crossbar selectors in the switching stages

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Monitoring And Testing Of Exchanges (AREA)
  • Exchange Systems With Centralized Control (AREA)
  • Interface Circuits In Exchanges (AREA)

Abstract

937,258. Automatic exchange systems. SVENSKA RELAFABRIKEN A.B.N. A.B. April 27, 1961, No. 15331/61. Drawings to Specification. Class 40 (4). In a system in which certain substations are provided with individual keys for calling frequently wanted subscribers, the number of selecting signals is reduced by allocating similar signals to several different subscribers and making the selection dependent also on the identity of the calling subscriber. For this purpose there is employed an analysing circuit which may be common to a number of registers and which, when an individual selecting signal is received, determines the destination of the call in accordance with the identity of the calling line as registered on tens and units relays. Alternating current of graduated strength is employed both for the individual selecting signals and for the digital signals, but the individual signals are sent over only one leg of the line. Instead of the identity of the calling line being sent to the analysing circuit, it may receive a signal which may be the same for a number of sub-stations having the same traffic conditions. Connections are established to the calling and called lines over cross-bar switches operating under the control of markers.
GB1533161A 1961-05-02 1961-04-27 Improvements in automatic telecommunication systems Expired GB937258A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19611162888 DE1162888C2 (en) 1961-05-02 1961-05-02 CIRCUIT ARRANGEMENT FOR TELEPHONE SYSTEMS

Publications (1)

Publication Number Publication Date
GB937258A true GB937258A (en) 1963-09-18

Family

ID=5654637

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1533161A Expired GB937258A (en) 1961-05-02 1961-04-27 Improvements in automatic telecommunication systems

Country Status (2)

Country Link
DE (1) DE1162888C2 (en)
GB (1) GB937258A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3271524A (en) * 1961-09-27 1966-09-06 Bell Telephone Labor Inc Key type common control telephone switching system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3271524A (en) * 1961-09-27 1966-09-06 Bell Telephone Labor Inc Key type common control telephone switching system

Also Published As

Publication number Publication date
DE1162888B (en) 1973-01-04
DE1162888C2 (en) 1973-01-04

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