GB230563A - Improvements in telephone testing systems - Google Patents

Improvements in telephone testing systems

Info

Publication number
GB230563A
GB230563A GB3194323A GB3194323A GB230563A GB 230563 A GB230563 A GB 230563A GB 3194323 A GB3194323 A GB 3194323A GB 3194323 A GB3194323 A GB 3194323A GB 230563 A GB230563 A GB 230563A
Authority
GB
United Kingdom
Prior art keywords
standard
transmitter
receiver
resistance
subscriber
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
GB3194323A
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.)
AT&T Corp
Original Assignee
Western Electric Co Inc
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 Western Electric Co Inc filed Critical Western Electric Co Inc
Priority to GB3194323A priority Critical patent/GB230563A/en
Priority to FR576650D priority patent/FR576650A/fr
Publication of GB230563A publication Critical patent/GB230563A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/24—Arrangements for testing

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Monitoring And Testing Of Exchanges (AREA)
GB3194323A 1923-12-20 1923-12-20 Improvements in telephone testing systems Expired GB230563A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB3194323A GB230563A (en) 1923-12-20 1923-12-20 Improvements in telephone testing systems
FR576650D FR576650A (fr) 1923-12-20 1924-01-12 Méthode et procédé pour la détermination de l'efficacité de transmission des appareils et circuits téléphoniques

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3194323A GB230563A (en) 1923-12-20 1923-12-20 Improvements in telephone testing systems

Publications (1)

Publication Number Publication Date
GB230563A true GB230563A (en) 1925-03-19

Family

ID=10330694

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3194323A Expired GB230563A (en) 1923-12-20 1923-12-20 Improvements in telephone testing systems

Country Status (2)

Country Link
FR (1) FR576650A (fr)
GB (1) GB230563A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE872359C (de) * 1936-10-25 1953-03-30 Siemens Ag Verfahren zur Pruefung von Teilnehmerapparaten

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2457610A1 (fr) * 1979-04-20 1980-12-19 Laree Bernard Dispositif de mesure de l'intensite du micro des combines telephoniques munis de conjoncteurs

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE872359C (de) * 1936-10-25 1953-03-30 Siemens Ag Verfahren zur Pruefung von Teilnehmerapparaten

Also Published As

Publication number Publication date
FR576650A (fr) 1924-08-23

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