GB560936A - Improvements in or relating to automatic telecommunication exchange systems - Google Patents

Improvements in or relating to automatic telecommunication exchange systems

Info

Publication number
GB560936A
GB560936A GB14804/42A GB1480442A GB560936A GB 560936 A GB560936 A GB 560936A GB 14804/42 A GB14804/42 A GB 14804/42A GB 1480442 A GB1480442 A GB 1480442A GB 560936 A GB560936 A GB 560936A
Authority
GB
United Kingdom
Prior art keywords
relay
junction
impulse
resistance
selector
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
GB14804/42A
Other languages
English (en)
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 FR957473D priority Critical patent/FR957473A/fr
Application filed by Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Priority to GB14804/42A priority patent/GB560936A/en
Publication of GB560936A publication Critical patent/GB560936A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q1/00—Details of selecting apparatus or arrangements
    • H04Q1/18—Electrical details
    • H04Q1/30—Signalling arrangements; Manipulation of signalling currents
    • H04Q1/32—Signalling arrangements; Manipulation of signalling currents using trains of DC pulses

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Interface Circuits In Exchanges (AREA)
GB14804/42A 1942-10-22 1942-10-22 Improvements in or relating to automatic telecommunication exchange systems Expired GB560936A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
FR957473D FR957473A (enrdf_load_stackoverflow) 1942-10-22
GB14804/42A GB560936A (en) 1942-10-22 1942-10-22 Improvements in or relating to automatic telecommunication exchange systems

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB14804/42A GB560936A (en) 1942-10-22 1942-10-22 Improvements in or relating to automatic telecommunication exchange systems
GB2376771X 1942-10-22

Publications (1)

Publication Number Publication Date
GB560936A true GB560936A (en) 1944-04-27

Family

ID=26250810

Family Applications (1)

Application Number Title Priority Date Filing Date
GB14804/42A Expired GB560936A (en) 1942-10-22 1942-10-22 Improvements in or relating to automatic telecommunication exchange systems

Country Status (2)

Country Link
FR (1) FR957473A (enrdf_load_stackoverflow)
GB (1) GB560936A (enrdf_load_stackoverflow)

Also Published As

Publication number Publication date
FR957473A (enrdf_load_stackoverflow) 1950-02-20

Similar Documents

Publication Publication Date Title
GB1297565A (enrdf_load_stackoverflow)
GB560936A (en) Improvements in or relating to automatic telecommunication exchange systems
US2495725A (en) Pulse correcting repeater
US2669606A (en) Automatic toll trunking system
GB655682A (en) Improvements in telephone exchange systems
GB581284A (en) Improvements in or relating to telephone systems
US2376771A (en) Automatic telecommunication exchange system
GB543065A (en) Improvements in or relating to telephone systems
DE670202C (de) Schaltungsanordnung fuer Hochfrequenztelefonieverkehr, insbesondere ueber Starkstromleitungen
DE430277C (de) Schaltungsanordnung fuer Fernsprechanlagen mit Waehlerbetrieb
US2535872A (en) Signaling system
US2562555A (en) Automatic telephone system
US2814674A (en) Telephone trunk supervisory signalling system
GB533113A (en) Improvements relating to telephone and like signalling systems
DE915232C (de) Schaltungsanordnung fuer Fernschreib-Nebenstellenanlagen mit Waehlerbetrieb
GB547468A (en) Alternating current signalling systems
AT116322B (de) Schaltungsanordnung zur Herstellung verschiedenwertiger Verbindungen im Fernsprechanlagen mit Wählerbetrieb.
US2338216A (en) Signaling system
DE650668C (de) Schaltungsanordnung fuer Fernsprechanlagen mit Waehlerbetrieb
US2546067A (en) Two-way telephone trunk circuit
DE656936C (de) Schaltungsanordnung fuer Fernmelde-, insbesondere Fernsprechanlagen, mit an gemeinsamer Leitung liegenden, wahlweise anrufbaren Abzweigstellen
DE1762166C3 (de) Schaltungsanordnung zur automatischen Kanalumschaltung bei der Datenübertragung über Fernsprechleitungen mit zweikanaligen Datenmodems
DE710829C (de) Mit mehreren Abzweigstellen versehene Verbindungsleitung in Fernmeldeanlagen, insbesondere Fernsprechanlagen
GB534023A (en) Improvements in or relating to alternating current signalling systems
GB709081A (en) Telephone station ringing equipment