GB1055867A - Improvements in or relating to telephony exchange systems - Google Patents

Improvements in or relating to telephony exchange systems

Info

Publication number
GB1055867A
GB1055867A GB921365A GB921365A GB1055867A GB 1055867 A GB1055867 A GB 1055867A GB 921365 A GB921365 A GB 921365A GB 921365 A GB921365 A GB 921365A GB 1055867 A GB1055867 A GB 1055867A
Authority
GB
United Kingdom
Prior art keywords
exchange systems
circuit
relating
march
register
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
GB921365A
Inventor
Siemens Hal Aktiengesellschaft
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 filed Critical
Publication of GB1055867A publication Critical patent/GB1055867A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/08—Indicating faults in circuits or apparatus
    • H04M3/12—Marking faulty circuits "busy"; Enabling equipment to disengage itself from faulty circuits ; Using redundant circuits; Response of a circuit, apparatus or system to an error
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/0008—Selecting arrangements using relay selectors in the switching stages
    • H04Q3/0012—Selecting arrangements using relay selectors in the switching stages in which the relays are arranged in a matrix configuration

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)
  • Monitoring And Testing Of Exchanges (AREA)
  • Exchange Systems With Centralized Control (AREA)

Abstract

1,055,867. Automatic exchange systems- SIEMENS & HALSKE A.G. March 4, 1965 [March 5, 1964], No. 9213/65. Heading H4K. In a PBX employing a common circuit for identifying a calling line, the latter being connected to an idle link circuit and thence to a register, in the event of the caller hanging up before a link circuit is seized or of dialling prematurely, the common identifier is at once released, and similar action takes place if the connection to the register proves to be faulty. Thus the holding of the identifier is not dependent on a timing circuit. Specification 1.022,022 is referred to.
GB921365A 1964-03-05 1965-03-04 Improvements in or relating to telephony exchange systems Expired GB1055867A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DES89859A DE1211282B (en) 1964-03-05 1964-03-05 Circuit arrangement for a telephone, in particular telephone branch exchange, with a central device for identification

Publications (1)

Publication Number Publication Date
GB1055867A true GB1055867A (en) 1967-01-18

Family

ID=7515395

Family Applications (1)

Application Number Title Priority Date Filing Date
GB921365A Expired GB1055867A (en) 1964-03-05 1965-03-04 Improvements in or relating to telephony exchange systems

Country Status (7)

Country Link
BE (1) BE660689A (en)
CH (1) CH420282A (en)
DE (1) DE1211282B (en)
FR (1) FR1431203A (en)
GB (1) GB1055867A (en)
NL (1) NL150982B (en)
SE (1) SE311544B (en)

Also Published As

Publication number Publication date
SE311544B (en) 1969-06-16
NL150982B (en) 1976-09-15
CH420282A (en) 1966-09-15
FR1431203A (en) 1966-03-11
NL6501793A (en) 1965-09-06
BE660689A (en) 1965-09-06
DE1211282B (en) 1966-02-24

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