GB1513465A - Line testing circuit for switching system - Google Patents

Line testing circuit for switching system

Info

Publication number
GB1513465A
GB1513465A GB3836175A GB3836175A GB1513465A GB 1513465 A GB1513465 A GB 1513465A GB 3836175 A GB3836175 A GB 3836175A GB 3836175 A GB3836175 A GB 3836175A GB 1513465 A GB1513465 A GB 1513465A
Authority
GB
United Kingdom
Prior art keywords
circuit
line
condition
output
sept
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
GB3836175A
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.)
International Standard Electric Corp
Original Assignee
International Standard Electric Corp
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 International Standard Electric Corp filed Critical International Standard Electric Corp
Publication of GB1513465A publication Critical patent/GB1513465A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Tests Of Electronic Circuits (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)
GB3836175A 1974-09-24 1975-09-18 Line testing circuit for switching system Expired GB1513465A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7432118A FR2286573A1 (fr) 1974-09-24 1974-09-24 Circuit d'exploration pour systeme de commutation

Publications (1)

Publication Number Publication Date
GB1513465A true GB1513465A (en) 1978-06-07

Family

ID=9143363

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3836175A Expired GB1513465A (en) 1974-09-24 1975-09-18 Line testing circuit for switching system

Country Status (5)

Country Link
BE (1) BE833739A (enExample)
BR (1) BR7505686A (enExample)
ES (1) ES441228A1 (enExample)
FR (1) FR2286573A1 (enExample)
GB (1) GB1513465A (enExample)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2938981A1 (de) * 1979-09-26 1981-04-30 Siemens AG, 1000 Berlin und 8000 München Schaltungsanordnung zur registrierung des schaltzustandes in einem insbesondere durch teilnehmeranschlussleitungen von fernsprechvermittlungsanlagen gebildeten schaltkreis
DE2938946A1 (de) * 1979-09-26 1981-04-09 Siemens AG, 1000 Berlin und 8000 München Schaltungsanordnung zur verhinderung der nachteiligen auswirkung von wechselspannungsanteilen bei der registrierung des schaltzustandes in einem insbesondere durch teilnehmeranschlussleitungen in fernsprechvermittlungsanlagen gebildeten schaltkreis

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE754235A (fr) * 1969-08-05 1970-12-31 Western Electric Co Circuit de supervision pour lignes telephoniques
FR2158619A5 (enExample) * 1971-10-26 1973-06-15 Constr Telephoniques

Also Published As

Publication number Publication date
FR2286573A1 (fr) 1976-04-23
BE833739A (fr) 1976-03-24
BR7505686A (pt) 1978-01-10
FR2286573B1 (enExample) 1979-02-16
ES441228A1 (es) 1977-03-16

Similar Documents

Publication Publication Date Title
ES8204168A1 (es) Perfeccionamientos en la deteccion de fallos en sistemas sensores
GB1168073A (en) Improvements relating to the Handling of Data
GB1234169A (enExample)
JPS5730098A (en) Method of transmitting measured value in fire alarm unit and device for executing same method
JPS475054Y1 (en) Signal selection and monitoring system
GB1025589A (en) Burglar alarm apparatus and system
GB970736A (en) Improvements in or relating to pulse communication systems
US3187262A (en) Detector of phase differences between currents of different frequencies
GB1513465A (en) Line testing circuit for switching system
ES458597A1 (es) Aparato para la indicacion digital de valores de medicion y verificacion electricos.
GB1273429A (en) Improvements in or relating to measuring instruments
GB1263798A (en) Measuring apparatus
GB1501562A (en) Signal detection apparatus
GB1430091A (en) Apparatus for detecting smoke and like suspensions
GB1144549A (en) Pulse modulation system
GB1271768A (en) Alarm device
GB1233476A (enExample)
GB1031612A (en) Improvements in or relating to indicating systems
JPS56155428A (en) Sequence monitoring device for question-and-answer type bus
SU552713A1 (ru) Система телеконтрол промежуточных станций системы св зи
SU558343A1 (ru) Способ дифференцильной токовой защиты
GB1403968A (en) Monitoring arrangements
GB907961A (en) Improvements in or relating to circuit arrangements for testing for the presence of voltages
NO141236C (no) System for identifisering av en gruppe av radiofrekvenspulser i et radiofrekvenssignal
GB1266223A (enExample)

Legal Events

Date Code Title Description
PS Patent sealed
746 Register noted 'licences of right' (sect. 46/1977)
PCNP Patent ceased through non-payment of renewal fee