FR1184842A - Système pour tester les lignes téléphoniques - Google Patents

Système pour tester les lignes téléphoniques

Info

Publication number
FR1184842A
FR1184842A FR1184842DA FR1184842A FR 1184842 A FR1184842 A FR 1184842A FR 1184842D A FR1184842D A FR 1184842DA FR 1184842 A FR1184842 A FR 1184842A
Authority
FR
France
Prior art keywords
telephone lines
testing telephone
testing
lines
telephone
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
Other languages
English (en)
French (fr)
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
Application granted granted Critical
Publication of FR1184842A publication Critical patent/FR1184842A/fr
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/58—Arrangements providing connection between main exchange and sub-exchange or satellite

Landscapes

  • Physics & Mathematics (AREA)
  • Astronomy & Astrophysics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Radio Relay Systems (AREA)
FR1184842D 1956-12-07 1957-10-18 Système pour tester les lignes téléphoniques Expired FR1184842A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US626846A US2892037A (en) 1956-12-07 1956-12-07 Electrical information system

Publications (1)

Publication Number Publication Date
FR1184842A true FR1184842A (fr) 1959-07-27

Family

ID=24512104

Family Applications (1)

Application Number Title Priority Date Filing Date
FR1184842D Expired FR1184842A (fr) 1956-12-07 1957-10-18 Système pour tester les lignes téléphoniques

Country Status (6)

Country Link
US (1) US2892037A (instruction)
BE (1) BE560633A (instruction)
DE (1) DE1073552B (instruction)
FR (1) FR1184842A (instruction)
GB (1) GB843225A (instruction)
NL (2) NL112427C (instruction)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1260552B (de) * 1965-02-15 1968-02-08 Telefonbau Relaislose Teilnehmeranschlussschaltung fuer Fernsprechanlagen

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3061817A (en) * 1959-04-22 1962-10-30 Gen Dynamics Corp Finder circuit
US3028510A (en) * 1959-12-21 1962-04-03 Automatic Elect Lab Diode gate utilizing charged capacitor to forward bias diode
DE1162418B (de) * 1960-11-22 1964-02-06 Standard Elektrik Lorenz Ag Schaltungsanordnung zur Verhinderung der faelschlichen Auswertung von UEberspannungen durch Signalempfaenger in Fernmeldeanlagen
US3129291A (en) * 1960-12-29 1964-04-14 Bell Telephone Labor Inc Remote distributed telephone line concentrator
BE626082A (instruction) * 1961-03-03
DE1157665B (de) * 1962-04-04 1963-11-21 Telefunken Patent Schaltungsanordnung zur Pruefung des Belegungszustandes von Teilnehmerleitungen in Fernmelde-, insbesondere Fernsprechanlagen
US3393276A (en) * 1964-10-14 1968-07-16 Ericsson Telefon Ab L M Threshold crosspoint identifying means for an automatic telephone exchange
BE754235A (fr) * 1969-08-05 1970-12-31 Western Electric Co Circuit de supervision pour lignes telephoniques
ZA74205B (en) * 1973-02-12 1974-11-27 Int Standard Electric Corp Line condition signalling system
US4150258A (en) * 1975-02-03 1979-04-17 Oki Electric Industry Co., Ltd. Electronic switching system
US4292473A (en) * 1979-08-06 1981-09-29 International Standard Electric Corporation Loop supervision circuit

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE517178A (instruction) * 1952-01-26
US2715656A (en) * 1952-08-02 1955-08-16 Bell Telephone Labor Inc Electrical information system
US2724744A (en) * 1954-05-06 1955-11-22 Bell Telephone Labor Inc Remote line concentrator
US2783307A (en) * 1954-05-06 1957-02-26 Bell Telephone Labor Inc Supervisory circuit
DE1093704B (de) 1956-04-23 1960-11-24 United Shoe Machinery Corp Selbsttaetige Schuhfuehrung, bestehend aus Vorderteil und Rahmen-faltenfuehrung, in einer Sohlenbeschneidemaschine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1260552B (de) * 1965-02-15 1968-02-08 Telefonbau Relaislose Teilnehmeranschlussschaltung fuer Fernsprechanlagen

Also Published As

Publication number Publication date
US2892037A (en) 1959-06-23
BE560633A (instruction)
NL112427C (instruction)
DE1073552B (de) 1960-01-21
NL220430A (instruction)
GB843225A (en) 1960-08-04

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