FR867450A - Central office communications systems - Google Patents

Central office communications systems

Info

Publication number
FR867450A
FR867450A FR867450DA FR867450A FR 867450 A FR867450 A FR 867450A FR 867450D A FR867450D A FR 867450DA FR 867450 A FR867450 A FR 867450A
Authority
FR
France
Prior art keywords
central office
communications systems
office communications
systems
central
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
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.)
Thales SA
Original Assignee
Le Materiel Telephonique Thomson CSF
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 Le Materiel Telephonique Thomson CSF filed Critical Le Materiel Telephonique Thomson CSF
Application granted granted Critical
Publication of FR867450A publication Critical patent/FR867450A/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)
  • Monitoring And Testing Of Exchanges (AREA)
  • Interface Circuits In Exchanges (AREA)
FR867450D 1939-07-24 1940-10-10 Central office communications systems Expired FR867450A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US286220A US2295032A (en) 1939-07-24 1939-07-24 Communication exchange system

Publications (1)

Publication Number Publication Date
FR867450A true FR867450A (en) 1941-10-27

Family

ID=23097618

Family Applications (1)

Application Number Title Priority Date Filing Date
FR867450D Expired FR867450A (en) 1939-07-24 1940-10-10 Central office communications systems

Country Status (5)

Country Link
US (1) US2295032A (en)
CH (1) CH235878A (en)
FR (1) FR867450A (en)
GB (1) GB541768A (en)
NL (1) NL57724C (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2471415A (en) * 1940-05-22 1949-05-31 Int Standard Electric Corp Telephone calling line identification system
FR960696A (en) * 1942-06-15 1950-04-22
NL76006C (en) * 1946-06-20
BE486659A (en) * 1948-01-08
FR993449A (en) * 1949-06-27 1951-10-31 Materiel Telephonique Improvements to automatic switching systems
FR1034629A (en) * 1950-11-09 1953-07-28 Materiel Telephonique Improvements to signaling systems used to characterize subscriber lines in a telephone network
BE508995A (en) * 1951-03-16

Also Published As

Publication number Publication date
GB541768A (en) 1941-12-10
US2295032A (en) 1942-09-08
NL57724C (en)
CH235878A (en) 1944-12-31

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