NL234653A - - Google Patents

Info

Publication number
NL234653A
NL234653A NL234653DA NL234653A NL 234653 A NL234653 A NL 234653A NL 234653D A NL234653D A NL 234653DA NL 234653 A NL234653 A NL 234653A
Authority
NL
Netherlands
Application number
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.)
Publication of NL234653A publication Critical patent/NL234653A/xx

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q1/00—Details of selecting apparatus or arrangements
    • H04Q1/18—Electrical details
    • H04Q1/20—Testing circuits or apparatus; Circuits or apparatus for detecting, indicating, or signalling faults or troubles
    • H04Q1/22—Automatic arrangements
    • H04Q1/26—Automatic arrangements for signalling trouble in unoccupied sub-exchanges
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/0004—Selecting arrangements using crossbar selectors in the switching stages

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)
  • Counters In Electrophotography And Two-Sided Copying (AREA)
  • Paper Feeding For Electrophotography (AREA)
  • Exchange Systems With Centralized Control (AREA)
NL234653D 1957-12-31 NL234653A (ja)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US706342A US2894072A (en) 1957-12-31 1957-12-31 Centralized memory line concentrator system

Publications (1)

Publication Number Publication Date
NL234653A true NL234653A (ja)

Family

ID=24837144

Family Applications (2)

Application Number Title Priority Date Filing Date
NL234653D NL234653A (ja) 1957-12-31
NL130183D NL130183C (ja) 1957-12-31

Family Applications After (1)

Application Number Title Priority Date Filing Date
NL130183D NL130183C (ja) 1957-12-31

Country Status (6)

Country Link
US (1) US2894072A (ja)
BE (1) BE574292A (ja)
DE (1) DE1149407B (ja)
FR (1) FR1221633A (ja)
GB (1) GB908700A (ja)
NL (2) NL130183C (ja)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1068763B (de) * 1955-08-23 1959-11-12 Automatic Electric Laboratories, Inc., Chicago, 111. (V. St. A.) Schaltungsanordnung zum zweidrahtmäßigen Verbinden von Leitungsabschnitten über eine Zeitmultiplexubertragungsleitung
FR1187979A (fr) * 1958-01-14 1959-09-17 Constr Telephoniques Perfectionnements aux systèmes téléphoniques
US3047665A (en) * 1958-03-28 1962-07-31 Bell Telephone Labor Inc Traffic recorder
FR1212109A (fr) * 1958-07-26 1960-03-22 Concentrateur de trafic téléphonique
US3106615A (en) * 1958-12-22 1963-10-08 Automatic Elect Lab Communication switching system
US3114007A (en) * 1959-07-01 1963-12-10 Bell Telephone Labor Inc Supervisory circuit
US3151219A (en) * 1959-07-28 1964-09-29 Gen Dynamics Corp Tone detecting circuitry

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2774822A (en) * 1952-08-02 1956-12-18 Bell Telephone Labor Inc Communication system
US2715656A (en) * 1952-08-02 1955-08-16 Bell Telephone Labor Inc Electrical information system
DE971475C (de) * 1953-08-21 1959-02-05 Int Standard Electric Corp Schaltungsanordnung fuer grosse automatische Landzentralen
US2812385A (en) * 1955-12-28 1957-11-05 Bell Telephone Labor Inc Line concentrator system

Also Published As

Publication number Publication date
GB908700A (en) 1962-10-24
DE1149407B (de) 1963-05-30
NL130183C (ja)
FR1221633A (fr) 1960-06-02
US2894072A (en) 1959-07-07
BE574292A (fr) 1959-04-16

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