GB252355A - Improvements in or relating to fault-signalling means for automatic telephone plants - Google Patents

Improvements in or relating to fault-signalling means for automatic telephone plants

Info

Publication number
GB252355A
GB252355A GB1209026A GB1209026A GB252355A GB 252355 A GB252355 A GB 252355A GB 1209026 A GB1209026 A GB 1209026A GB 1209026 A GB1209026 A GB 1209026A GB 252355 A GB252355 A GB 252355A
Authority
GB
United Kingdom
Prior art keywords
relay
energizes
chain
switch
switches
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
GB1209026A
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.)
AUTOMATISCHE FERNSPRECH ANLAGE
Original Assignee
AUTOMATISCHE FERNSPRECH ANLAGE
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 AUTOMATISCHE FERNSPRECH ANLAGE filed Critical AUTOMATISCHE FERNSPRECH ANLAGE
Publication of GB252355A publication Critical patent/GB252355A/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
    • H04M3/14—Signalling existence of persistent "off-hook" condition
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Monitoring And Testing Of Exchanges (AREA)
GB1209026A 1925-05-25 1926-05-10 Improvements in or relating to fault-signalling means for automatic telephone plants Expired GB252355A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEA0045063 1925-05-25

Publications (1)

Publication Number Publication Date
GB252355A true GB252355A (en) 1927-08-10

Family

ID=6934522

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1209026A Expired GB252355A (en) 1925-05-25 1926-05-10 Improvements in or relating to fault-signalling means for automatic telephone plants

Country Status (3)

Country Link
BE (1) BE252855A (enrdf_load_stackoverflow)
FR (1) FR621406A (enrdf_load_stackoverflow)
GB (1) GB252355A (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116389433A (zh) * 2016-09-09 2023-07-04 Vid拓展公司 用于减少360度视区自适应流媒体延迟的方法和装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116389433A (zh) * 2016-09-09 2023-07-04 Vid拓展公司 用于减少360度视区自适应流媒体延迟的方法和装置

Also Published As

Publication number Publication date
FR621406A (fr) 1927-05-11
BE252855A (enrdf_load_stackoverflow)

Similar Documents

Publication Publication Date Title
GB252355A (en) Improvements in or relating to fault-signalling means for automatic telephone plants
US1927744A (en) Signal or alarm system
US1871457A (en) Signaling system
GB267556A (en) Improvements in or relating to electric signalling systems
US2067320A (en) Measuring system for program circuit maintenance
GB293294A (en) Improvements in or relating to telephone systems
GB307040A (en) Circuit arrangement for telephone installations
GB287377A (en) Improved selecting arrangement for fire alarm and like systems
GB696988A (en) Improvements in or relating to automatic signalling systems
GB205505A (en) Impulse circuit arrangements for automatic switches or repeaters of the type used intelephone systems
US1796376A (en) Apparatus for testing railroad signal systems
GB293747A (en) A circuit arrangement for the transmission of messages over telephone lines
GB591097A (en) Improvements in or relating to alarm systems
GB350814A (en) Improvements in or relating to annunciators
JPS5312206A (en) Channel test system
ES400466A1 (es) Red de transmision yno conmutacion de senales codificadas.
GB203755A (en) An alarm signal system for automatic water gas set
GB190163A (en) Improvements in selectors for party-line telephone installations
GB322050A (en) Improvements in fire alarm systems in conjunction with telephone exchange systems
GB336456A (en) Improvements relating to the prevention of gum formation in gas distribution systems
GB508577A (en) Improvements in and relating to telephone installations
GB342016A (en) Improvements in line distributing systems for electrical signals
GB143033A (en) Improvements in signal and light repeaters and circuits
DK65753C (da) Fjernsignaleringsanlæg, i hvilket en Abonnents Liniekreds har Modstande i Stedet for Linierelæer og Bryderelæer.
GB717495A (en) Improvements in or relating to railway signalling systems