FR971853A - Système téléphonique à exploitation interurbaine - Google Patents

Système téléphonique à exploitation interurbaine

Info

Publication number
FR971853A
FR971853A FR971853DA FR971853A FR 971853 A FR971853 A FR 971853A FR 971853D A FR971853D A FR 971853DA FR 971853 A FR971853 A FR 971853A
Authority
FR
France
Prior art keywords
long distance
telephone system
distance telephone
long
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)
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.)
Automatic Electric Laboratories Inc
Original Assignee
Automatic Electric Laboratories 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
Priority claimed from US775818A external-priority patent/US2550755A/en
Application filed by Automatic Electric Laboratories Inc filed Critical Automatic Electric Laboratories Inc
Priority claimed from US104513A external-priority patent/US2596833A/en
Application granted granted Critical
Publication of FR971853A publication Critical patent/FR971853A/fr
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/60—Semi-automatic systems, i.e. in which the numerical selection of the outgoing line is under the control of an operator
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Interface Circuits In Exchanges (AREA)
FR971853D 1947-09-24 1948-09-21 Système téléphonique à exploitation interurbaine Expired FR971853A (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US688197XA 1947-09-24 1947-09-24
US775818A US2550755A (en) 1947-09-24 1947-09-24 Toll switching telephone system
US104513A US2596833A (en) 1947-09-24 1949-07-13 Toll switching telephone system

Publications (1)

Publication Number Publication Date
FR971853A true FR971853A (fr) 1951-01-23

Family

ID=27371424

Family Applications (1)

Application Number Title Priority Date Filing Date
FR971853D Expired FR971853A (fr) 1947-09-24 1948-09-21 Système téléphonique à exploitation interurbaine

Country Status (2)

Country Link
FR (1) FR971853A (fr)
GB (1) GB688197A (fr)

Also Published As

Publication number Publication date
GB688197A (en) 1953-03-04

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